CPT code 43235 is the billing code for a diagnostic esophagogastroduodenoscopy (EGD), a flexible upper GI endoscopy that examines the esophagus, stomach, and duodenum without tissue removal or therapeutic intervention.
Procedure: CPT 43235 covers visual inspection of the upper GI tract, including specimen collection by brushing or washing when performed, but no biopsy and no therapeutic intervention.
Exclusions: When tissue is removed for biopsy, use CPT 43239. When bleeding is controlled, use CPT 43255. When dilation is performed, use CPT 43249. When CPT 43889 appears on the same claim for the same session, do not report CPT 43235 alongside it.
Documentation Requirements: Medical records must support medical necessity and include the clinical indication, the extent of the examination to D2 or the documented stop point, segmental findings, any specimens collected by brushing or washing, and post-procedure patient status.
Gastroenterology practices billing high volumes of EGD claims face CO-97 bundling denials, modifier errors, and medical necessity gaps that compound across hundreds of claims per month. One O Seven RCM‘s GI denial recovery services stops these patterns before they reach the payer.
This guide covers the 2026 code descriptor, the comparison with CPT 43239, every applicable modifier with documentation language, NCCI bundling rules including the 2026 CPT 43889 restriction, Q3 2026 NCCI PTP edit updates, Medicare reimbursement rates sourced from Medicare.gov, ICD-10 diagnosis pairings, and a nine-item pre-submission denial prevention checklist.
The gastroenterology medical billing section at the end of each block covers One O Seven RCM’s scope. Every rule traces to CMS, the AMA, or the ASGE.
What Changed for CPT 43235 in 2026
CPT 43889 Now Bundles With CPT 43235 (Effective January 1, 2026)
CPT 43889, the new Category I code for endoscopic sleeve gastroplasty, took effect January 1, 2026. Payers treat CPT 43235 as bundled into CPT 43889 when both codes appear on the same claim for the same session. The AMA coding note for CPT 43889 prohibits reporting a diagnostic EGD alongside it.
Bariatric endoscopy practices that perform a combined diagnostic EGD before the sleeve gastroplasty must report only CPT 43889 for the session. CPT 43889 carries a 90-day global period, unlike CPT 43235, which carries a 0-day global period. Confusing the global periods causes improper E/M bundling on follow-up visits.
The 2026 Medicare Conversion Factor Affects CPT 43235 Payment
The 2026 CMS Physician Fee Schedule established two conversion factors: $33.57 for qualifying Alternative Payment Model participants and $33.40 for non-qualifying participants. The 2025 conversion factor was $32.35. The increase for qualifying APM participants is $1.22, a 3.83% gain.
Multiply the applicable conversion factor by the total RVUs for CPT 43235 in your site of service to estimate your Medicare payment before locality adjustment. CPT 43235 carries 2.39 work RVUs under the 2026 fee schedule.
Q3 2026 NCCI PTP Edit Table Update (Effective July 1, 2026)
CMS posted its Q3 2026 Practitioner PTP Edits file (v32r0) on June 1, 2026, effective July 1, 2026. GI billing teams should pull the current NCCI PTP edit file before submitting any EGD claim that pairs CPT 43235 or CPT 43239 with another endoscopy code on the same date of service.
See CMS NCCI Policy Manual Chapter 6, 2026 for the full endoscopy bundling table.
Prior-quarter edit tables produce automatic denials when a new bundling restriction took effect after the last pull. Pull the current file at the start of every quarter.
What CPT Code 43235 Covers
The AMA’s official CPT code descriptor reads: “Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure).” CPT 43235 covers the base EGD examination. Brushing or washing for cytology is included in the code payment. No additional code is reported when the only specimens collected during the session are taken by brushing or washing.
When Gastroenterologists Use CPT 43235
Use CPT 43235 when the EGD is diagnostic: the physician visually inspects the esophagus, stomach, and duodenum, documents findings, and may collect specimens by brushing or washing only. No tissue removal, no bleeding control, no dilation, no stent placement, no biopsy.
The following clinical presentations support CPT 43235 under LCD L35350 coverage criteria:
- Persistent dysphagia with no prior workup
- Unexplained upper GI bleeding or melena
- Iron-deficiency anemia requiring investigation
- Chronic GERD symptoms with alarm features
- Persistent nausea and vomiting unresponsive to treatment
- Unexplained weight loss in patients over 50
- Surveillance for Barrett’s esophagus (diagnostic only, no biopsy taken)
- Suspected gastritis or peptic ulcer disease
- Refractory GERD not responding to standard pharmacotherapy (2026 LCD addition)
- Abnormal imaging findings requiring endoscopic correlation (2026 LCD addition)
ICD-10 Diagnosis Codes That Support CPT 43235
Pair CPT 43235 with a diagnosis code that matches the documented clinical indication. The table below shows the most common ICD-10 codes used with CPT 43235 and their coverage status under CMS Billing and Coding Article A57414.
| ICD-10 Code | Description | Coverage Status |
|---|---|---|
| K21.0 | GERD with esophagitis | Covered |
| K21.9 | GERD without esophagitis | Covered |
| K92.1 | Melena | Covered |
| K29.70 | Gastritis without bleeding | Covered |
| K31.5 | Obstruction of duodenum | Covered |
| R13.10 | Dysphagia, unspecified | Covered |
| D50.9 | Iron-deficiency anemia, unspecified | Covered |
| R11.10 | Vomiting, unspecified | Covered |
| K22.70 | Barrett’s esophagus without dysplasia | Covered |
| K22.10 | Esophagitis, unspecified | Covered |
Coverage per LCD L35350 when documented as medically necessary. Source: CMS Billing and Coding Article A57414.
Unspecified diagnosis codes carry higher review risk when documentation supports a more specific code. Use the most specific ICD-10 code the clinical record supports.
For practices managing related abdominal diagnoses, our guide on abdominal pain ICD-10 coding covers the specificity rules that apply across the full GI coding range.
CPT Code 43235 vs CPT 43239: When the Code Changes
CPT 43235 and CPT 43239 describe the same base procedure, an upper GI endoscopy performed through the mouth, but differ at one decision point: whether tissue was removed. That single clinical decision determines which code the claim carries and whether billing both codes on the same claim triggers an automatic denial.
CPT 43235 vs CPT 43239 Comparison Table
The ASGE EGD CPT coding reference defines the official AMA names for both codes. The comparison below adds 2026 RVU data and denial codes that no other editorial source includes in a comparison table.
| Feature | CPT 43235 | CPT 43239 |
|---|---|---|
| Official AMA Name | EGD, flexible, transoral; diagnostic | EGD, flexible, transoral; biopsy, single or multiple |
| Action Taken | Visual inspection; brushing or washing for cytology if performed | Visual inspection plus tissue removal with biopsy forceps for histological analysis |
| Tools Used | Flexible endoscope only | Flexible endoscope plus biopsy forceps or sampling instruments |
| Biopsy Included | No. Brushing or washing for cytology only. | Yes. Tissue is removed for pathological examination. |
| Reimbursement | Lower, diagnostic base rate. 2.39 work RVUs. | Higher, additional complexity for biopsy. 2.76 work RVUs. |
| Denial Risk When Miscoded | CO-97 fires when 43235 is billed alongside 43239 on the same claim | CO-50 fires when biopsy is documented but 43235 was selected instead of 43239 |
2026 RVU data per CMS Physician Fee Schedule. CO-97 and CO-50 per CMS NCCI PTP edits.
The Cytology vs Biopsy Rule
Brushing or washing collects cells from the mucosal surface without removing tissue. Cytology analysis follows. That collection is included in CPT 43235 at no additional code.
Biopsy uses forceps to remove a tissue sample for histological analysis. That action requires CPT 43239. The distinction is not in what the pathologist does with the specimen but in how the gastroenterologist collected it.
CPT 43235: Covers visual inspection and specimen collection by brushing or washing for cytology. No tissue removal during the session.
CPT 43239: Covers visual inspection plus biopsy, single or multiple. The moment forceps remove tissue, the diagnostic service is bundled into CPT 43239. Do not report CPT 43235 alongside CPT 43239 for the same session.
Practices that perform same-day EGD and colonoscopy must place the colonoscopy code first on the claim because Medicare reimburses the higher-RVU procedure at 100% and reduces the lower-RVU procedure. Code-order sequencing is a direct revenue decision on every same-day procedure billing submission.
When EGD documentation is complete and the code selection is clear, the next error point is whether billing both codes on the same claim triggers an automatic denial. The following section covers the exact NCCI ruling on that question.
Can You Bill CPT 43235 and CPT 43239 Together?
The Direct Answer: No. CPT 43235 and CPT 43239 cannot be billed together for the same patient encounter on the same date of service.
The Coding Rule: CPT 43239 is a “child” code to the base diagnostic procedure CPT 43235. The moment tissue is removed for biopsy, the diagnostic service is absorbed into CPT 43239, and CPT 43235 is no longer separately reportable for that session.
Result of Billing Both: Submitting CPT 43235 and CPT 43239 on the same claim triggers National Correct Coding Initiative unbundling edits. The payer issues a CO-97 denial, meaning the claim was included in a previously adjudicated benefit, in this case, the biopsy code that already includes the diagnostic service.
What to Bill: If no tissue was removed, bill CPT 43235 only. If a biopsy was taken at any point during the session, regardless of how many biopsy sites were sampled, bill CPT 43239 only.
If the original pre-certification was for a diagnostic EGD and the procedure changed to a biopsy EGD during the session, the claim must reflect what was performed, not what was authorized.
Modifiers for CPT 43235
CPT 43235 doesn’t require a modifier on every claim. Three modifiers have specific and appropriate applications with this code. Four modifiers are regularly misapplied, producing CO-4 denials that are entirely avoidable. Knowing the difference prevents the denial before the claim reaches the payer.
Modifier 52 (Reduced Service) for Incomplete EGD
Modifier 52 applies when the EGD began but couldn’t reach D2 due to anatomical obstruction, such as a tight stricture, and no therapeutic service was performed. The procedure was partially completed at the physician’s discretion. Document the specific stop point and the clinical reason.
Documentation language: “EGD reduced due to critical stricture at [location]; unable to advance to D2. No therapy performed. Patient tolerated procedure without acute adverse event.”
Modifier 52 applies when the physician makes a discretionary decision to reduce the service. If the incomplete exam was due to patient safety risk after anesthesia induction, use Modifier 53 instead.
Modifier 53 (Discontinued Procedure) for Patient Safety
Modifier 53 applies when the EGD started after anesthesia induction but the physician discontinued it because a patient safety event occurred. The distinction from Modifier 52 is critical: Modifier 52 is discretionary, Modifier 53 is compelled by a safety event.
Documentation language: “Procedure discontinued post-induction due to hypoxia [or appropriate clinical event]. Scope withdrawn. Patient stabilized. Procedure not completed.”
Modifier 22 (Increased Procedural Services)
Modifier 22 applies when the EGD required greater effort than typical, such as when anatomical abnormalities extended the procedure time beyond the standard range. This modifier requires documentation describing what made the service more complex.
Without specific documentation language supporting the increased effort, payers deny the Modifier 22 claim as unsupported. Modifier 26 and Modifier TC do not apply to surgical endoscopy codes like CPT 43235.
Modifier 25 (Same-Day Evaluation and Management Service)
Modifier 25 goes on the E/M code, not on the CPT 43235 line. When a gastroenterologist performs a separate, significant E/M service on the same day as an EGD, Modifier 25 on the E/M code signals the distinct service.
The 2026 NCCI documentation requirements for Modifier 25 on same-day E/M plus endoscopy claims tightened. The E/M documentation must contain a separate chief complaint, a separate HPI, and an independent clinical assessment beyond the EGD decision itself.
When Not to Use Modifier 59 With CPT 43235
Modifier 59 does not unbundle CPT 43235 from CPT 43239 or from other EGD family codes in the same session. The NCCI Modifier Indicator for the CPT 43235/CPT 43239 pair is 0, meaning no modifier can override this edit. Applying Modifier 59 to bypass this bundling pair is a billing compliance violation.
Use Modifier XS only when a same-day colonoscopy was performed at a separate anatomical site and is fully documented as a distinct service.
Modifier XS (Same-Day Colonoscopy)
When a gastroenterologist performs an EGD (CPT 43235) and a colonoscopy (CPT 45378) on the same day, Modifier XS on the colonoscopy code signals a distinct service at a separate anatomical site. The ASGE and CMS both encourage X-modifier use over Modifier 59 to reduce audit risk.
Documentation language: “EGD (CPT 43235) and colonoscopy (CPT 45378-XS) performed sequentially. EGD findings: [document separately]. Colonoscopy findings: [document separately]. Separate operative notes for each procedure.”
| Modifier errors on EGD claims produce CO-4 denials at the payer level and CO-97 denials when stacking errors compound. One O Seven RCM’s EGD denial management process reviews modifier configuration across all active EGD claim lines before submission. |
NCCI Edits and Bundling Rules for CPT 43235 (2026)
CMS NCCI Chapter 6 governs which CPT codes can appear together on the same claim for endoscopic services. For CPT 43235, four NCCI rules govern GI billing claim outcomes.
The Comprehensive Code Rule
A diagnostic endoscopy is bundled into a more extensive surgical endoscopy performed in the same session. When the EGD moves from diagnostic to biopsy, CPT 43235 is absorbed into CPT 43239 and the payer pays for the more comprehensive service only.
Reporting CPT 43235 alongside CPT 43239, CPT 43255, CPT 43249, or any other therapeutic EGD family code on the same claim triggers an immediate NCCI edit denial on the CPT 43235 line.
CMS NCCI Policy Manual Chapter 6 states: “Surgical endoscopy includes diagnostic endoscopy. A diagnostic endoscopy HCPCS/CPT code shall not be reported with a surgical endoscopy code.” Source: CMS NCCI Policy Manual Chapter 6, Digestive System, effective January 1, 2026.
CPT 43889 Bundling (New January 1, 2026)
CPT 43889, endoscopic sleeve gastroplasty, took effect January 1, 2026. Payers bundle CPT 43235 into CPT 43889 when both codes appear for the same session. ASC practices billing combined diagnostic EGD and sleeve gastroplasty sessions must report only CPT 43889 for the session.
CPT 43235 Plus CPT 91035 on the Same Date
When CPT 43235 and CPT 91035 (Bravo pH capsule placement via endoscope) appear on the same claim for the same facility encounter, NCCI edits require Modifier 59 on CPT 43235 to document that the diagnostic EGD is a separate and identifiable procedure from the Bravo pH study.
CPT 43239 does not require a modifier when reported at the same encounter as CPT 91035. This rule appears in CMS NCCI Chapter 6, Section C, Endoscopic Services, and no other editorial source has published it specifically for CPT 43235. The medical record must support that separation.
Medically Unlikely Edits (MUE) for CPT 43235
CMS Medically Unlikely Edits cap the maximum units of CPT 43235 that a single provider can bill for a single patient on a single date of service. The MUE for CPT 43235 is 1 unit per date of service.
Submitting 2 or more units of CPT 43235 for the same patient on the same date produces a CO-144 denial. GI practices should confirm their charge capture system doesn’t auto-populate units above 1 for this code. CO-144 denials carry no appeal pathway when the MUE limit reflects a genuine coding error.
Integral Services Not Separately Reportable With CPT 43235
The following services are integral to CPT 43235 and cannot be billed separately on the same claim per CMS NCCI Chapter 6:
- Venous access (CPT 36000)
- Infusion or injection services related to the endoscopy (CPT 96360 through 96379)
- Non-invasive pulse oximetry (CPT 94760, 94761)
- Anesthesia provided by the performing physician
These codes generate automatic NCCI edit denials when paired with CPT 43235. Remove each one from the claim before submission.
Sedation Coding With CPT 43235 in 2026
Beginning January 1, 2017, CMS removed moderate sedation from the relative value units for gastrointestinal endoscopy services, including CPT 43235. Practices that don’t bill sedation separately for EGD procedures under Medicare leave a distinct, separately compensated service uncollected on every qualifying claim.
Medicare Sedation Codes for CPT 43235 (G0500 and 99153)
When the same physician or qualified healthcare professional who performs the EGD also provides moderate sedation, bill G0500 for the first 15 minutes of intra-service time and CPT 99153 for each additional 15-minute block. CMS requires documentation of all three of the following for every Medicare sedation claim in 2026:
- Total intra-service time in minutes
- Sedation level (moderate or conscious sedation)
- Presence of an independent trained observer throughout the sedation
Missing any one of these three elements produces a denial on the sedation line. The 2026 documentation requirements mean pre-payment review requests now flag sedation lines where intra-service time is absent or vague.
Commercial Payer Sedation Codes (99152 and 99153)
Commercial payers use CPT 99152 for the first 15 minutes of moderate sedation provided by the same physician performing the procedure, not G0500. Use G0500 for Medicare claims only. Submit CPT 99153 for each additional 15-minute block for both Medicare and commercial payers.
Verify each payer’s current sedation documentation requirements before submitting, because commercial payer policies update independently of CMS guidance.
When an anesthesia professional provides deep sedation or general anesthesia for the EGD, do not bill G0500 or 99152. Bill anesthesia codes per the payer’s anesthesia billing policy and the anesthesiologist’s own claim.
CPT 43235 Reimbursement and Medicare Payment in 2026
Medicare covers CPT 43235 under Medicare Part B for outpatient services when the claim is supported by documented medical necessity and a covered ICD-10 diagnosis code under LCD L35350.
CPT 43235 Global Period (0 Days)
CPT 43235 carries a 0-day global period. No pre-procedure or post-procedure evaluation and management visits are bundled into the code payment. A patient returning the following day with a complication or an unrelated complaint generates a separately billable visit.
2026 Medicare Reimbursement Rates for CPT 43235
The 2026 Medicare national average payment for CPT 43235 varies by site of service. Use the Medicare.gov procedure price for CPT 43235 and the CMS Physician Fee Schedule Look-Up Tool to verify the current payment in your locality.
| Site of Service | Total Approved Amount | Medicare Pays (80%) | Patient Copay (20%) |
|---|---|---|---|
| Hospital Outpatient Department | $1,036 | $829 | $207 |
| Ambulatory Surgical Center | See Medicare.gov for current ASC rate | Varies | Varies |
| Non-Facility (Physician Office) | Use CMS PFS Look-Up Tool | Varies by locality | Varies |
Data: Medicare.gov Procedure Price Lookup, 2026 national averages. Florida locality 03 non-facility rate for reference: $332.33. Verify your locality-adjusted rate at the CMS Physician Fee Schedule Look-Up Tool.
Commercial Payer Rates for CPT 43235
Commercial payer reimbursement for CPT 43235 varies by contract and geography. Based on federal price transparency filings current as of June 2026, national average commercial rates range from approximately $346 (BCBS) to $469 (Cigna) for CPT 43235. These are market averages. Your contracted rate may be higher or lower.
Practices that haven’t renegotiated GI billing contracts since 2023 may collect below current market rates for this code.
When Aetna or UnitedHealthcare requires prior authorization for EGD procedures performed in an ambulatory surgical center, a missing authorization number produces a non-covered denial that can’t be recovered on appeal. One O Seven RCM’s EGD prior authorization services manages pre-procedure authorization across all major commercial payers.
ICD-10 Codes and Medical Necessity for CPT 43235
Medical necessity for CPT 43235 is governed by LCD L35350. The payer evaluates the ICD-10 diagnosis code on the claim against the covered indications list in the LCD. A code mismatch produces a CO-50 denial, meaning the service is not considered medically necessary based on the submitted diagnosis.
2026 LCD Indications Update for CPT 43235
CMS updated the covered indications for upper GI endoscopy under LCD L35350 for 2026. Three new covered indications under LCD L35350 for 2026:
- Unexplained weight loss with no prior diagnostic workup
- Refractory GERD not responding to standard pharmacotherapy
- Abnormal imaging findings requiring endoscopic correlation
One previously acceptable indication was narrowed: “rule out malignancy” is no longer sufficient as a standalone indication without supporting clinical evidence in the record. The physician’s note must link the endoscopy request to a specific symptom cluster, a prior test result, or a named condition.
Practices using template notes with “rule out malignancy” as the sole indication are generating CO-50 denials they can’t appeal under the 2026 criteria. The clinical justification must connect to one of the LCD L35350 covered indications explicitly.
ICD-10 Specificity and Audit Risk
Unspecified ICD-10 codes are valid when documentation doesn’t support a more specific code. When documentation does support specificity and the coder selects an unspecified code, the claim carries elevated audit and ADR request risk.
Specificity rule: use the most specific ICD-10 code the clinical record supports. For GERD, use K21.0 (with esophagitis) when esophagitis is documented, and K21.9 (without esophagitis) when esophagitis is absent.
Submitting K21.9 when the operative report documents esophagitis is a coding accuracy failure, not a documentation gap. The two situations require different corrective actions and different appeal strategies.
Clinical Scenarios: When to Bill CPT 43235 and When to Switch Codes
Scenario 1: Pure Diagnostic EGD, Brushings Only
Clinical Situation: A patient presents with persistent dysphagia. The gastroenterologist advances to D2, documents mucosal findings, and takes brushings for cytology. No tissue is removed.
Correct Code: CPT 43235
Why: The procedure is diagnostic. Brushings for cytology are included in CPT 43235 and don’t add a separate code.
Documentation Language: “EGD, diagnostic. Indication: persistent dysphagia (meets LCD L35350 criteria). Extent: to D2. Specimens: brushings for cytology only; no biopsy, no therapy. Post-procedure status: stable.”
Denial Risk if 43239 Used Instead: CO-11 (inconsistent diagnosis and procedure code pair) if the pathology report shows cytology only with no tissue biopsy.
Scenario 2: Diagnostic EGD, Biopsy Taken During the Procedure
Clinical Situation: A planned diagnostic EGD reveals a mucosal lesion. The physician collects a biopsy sample using forceps.
Correct Code: CPT 43239 only. Drop CPT 43235 from the claim.
Why: The moment tissue is removed, the diagnostic service is bundled into the surgical endoscopy. Report only CPT 43239. Don’t stack CPT 43235 on the same claim.
Documentation Language: “EGD with biopsy. Indication: abnormal mucosal lesion, duodenal body. Single biopsy specimen collected via forceps for histological analysis. No additional therapeutic intervention.”
Denial Risk if Both Codes Billed: CO-97 (payment included in another adjudicated benefit), automatic NCCI edit denial.
Scenario 3: Incomplete EGD Due to Stricture, No Therapy
Clinical Situation: A tight esophageal stricture prevents the scope from reaching D2. The physician documents the findings and withdraws the scope without dilation or any therapeutic procedure.
Correct Code: CPT 43235 with Modifier 52 (reduced service)
Why: The procedure started but couldn’t reach the standard endpoint. No therapeutic intervention occurred. Modifier 52 signals the physician’s discretionary reduction of the service.
Documentation Language: “EGD reduced due to critical esophageal stricture at [location]; unable to advance beyond mid-esophagus. No dilation or therapy performed. Patient tolerated without acute adverse event.”
Denial Risk Without Modifier 52: CO-B7 or payer-specific bundling edit when the procedure documentation doesn’t match the code’s full descriptor, because the claim shows a complete EGD but the report documents a stopped exam.
Scenario 4: EGD and Colonoscopy Same Day
Clinical Situation: A gastroenterologist performs a diagnostic upper endoscopy and a diagnostic colonoscopy during the same procedure session.
Correct Code: CPT 43235 (EGD) and CPT 45378 (colonoscopy) with Modifier XS on CPT 45378. List the colonoscopy first because it carries higher RVUs. Medicare reimburses the higher-RVU code at 100%.
Why: These are separate procedures at distinct anatomical sites. Modifier XS signals a separate anatomical site, not a separate session, when performed in the same operative setting.
Documentation Language: “EGD (CPT 43235) and colonoscopy (CPT 45378-XS) performed sequentially. EGD findings: [document separately]. Colonoscopy findings: [document separately]. Separate operative notes for each procedure.”
Denial Risk Without Modifier XS or Wrong Code Order: NCCI edit denial on CPT 45378 as bundled into the EGD claim, or Medicare payment reduction on the higher-value procedure when code order is reversed.
Texas and State-Level Billing Considerations for CPT 43235
Texas gastroenterology practices bill CPT 43235 under the Novitas Solutions MAC (Jurisdiction H for Texas, Oklahoma, Louisiana, Mississippi, and Arkansas). Novitas applies LCD L35350 medical necessity criteria, and Texas GPCI adjustments affect the locality-adjusted payment rate for CPT 43235.
Medicaid and Managed Care Considerations for CPT 43235 in Texas
Texas Medicaid covers CPT 43235 for eligible beneficiaries when the procedure meets medical necessity criteria. Texas Managed Care Organization plans, which cover the majority of Texas Medicaid enrollees, add prior authorization requirements on top of the state fee-for-service baseline.
Texas GI practices billing MCO plans must verify prior authorization requirements plan-by-plan before scheduling. A missing Medicaid MCO authorization for CPT 43235 produces a denial that most plans won’t retroactively approve without documented clinical urgency.
For practices credentialing new gastroenterologists in Texas or expanding to additional payers, Novitas enrollment and Medicaid MCO credentialing run on separate timelines. One O Seven RCM’s gastroenterology credentialing services manages both Novitas enrollment and MCO panel applications simultaneously so new providers bill from day one without revenue gaps.
Denial Prevention Checklist for CPT 43235 Claims
Run this checklist before submitting any CPT 43235 claim. Each item maps to a specific denial pattern covered in this guide.
□ Biopsy performed? If yes, switch to CPT 43239. Remove CPT 43235 from the claim entirely.
□ Sedation coded by payer type? Medicare: G0500 plus 99153 with intra-service time, sedation level, and independent observer documented. Commercial: 99152 plus 99153.
□ Integral services on the claim? Remove venous access (36000), infusion codes (96360 through 96379), and pulse oximetry (94760, 94761) from the EGD claim line.
□ Units correct? CPT 43235 bills at 1 unit per date of service. The MUE is 1. Submitting 2 or more units produces a CO-144 denial with no appeal pathway.
□ Extent of examination documented? State “to D2” or document the specific stop point with the clinical reason.
□ Modifier required? Modifier 52 for incomplete (tight stricture, physician discretion). Modifier 53 for discontinued (patient safety post-anesthesia induction). Do not append Modifier 59 to bypass NCCI bundling pairs.
□ Same-day colonoscopy? Add Modifier XS to CPT 45378. List colonoscopy first (higher RVUs). Write separate operative notes for each procedure.
□ CPT 43889 on the same claim? If CPT 43889 is on the claim for the same session, remove CPT 43235. They cannot appear together under any modifier.
□ ICD-10 specificity confirmed? Use the most specific ICD-10 code the clinical record supports. K21.0 when esophagitis is documented, not K21.9. Unspecified codes carry elevated CO-50 denial risk when documentation supports a specific code.
| EGD claims that clear all nine checkpoints above submit with the documentation and configuration for first-pass acceptance. When denial patterns repeat across multiple EGD claims despite correct coding, the issue is charge capture configuration or payer-contract ambiguity, not a single coding error. One O Seven RCM’s EGD billing denial recovery team reviews denial trend data by CPT code, modifier, and payer to stop recurring EGD billing errors at the root cause. |
Frequently Asked Questions About CPT Code 43235
What is the difference between CPT code 43235 and 43239?
CPT 43235 is a diagnostic EGD with no tissue removal. CPT 43239 is an EGD that includes a biopsy, single or multiple. When tissue is removed during the endoscopy, use CPT 43239 only and drop CPT 43235 from the claim. Brushing or washing for cytology during a 43235 EGD doesn’t change the code to 43239 because no tissue is removed.
Can you bill CPT 43235 and CPT 43239 together?
No. CPT 43239 is a child code that includes the diagnostic service of CPT 43235. Billing both together triggers NCCI unbundling edits and a CO-97 denial. Bill only the most comprehensive code that describes what the gastroenterologist performed during the session.
Does CPT 43235 require a modifier?
Not on every claim. Modifier 52 applies when the EGD was reduced but not discontinued. Modifier 53 applies when the procedure was discontinued after anesthesia induction for patient safety reasons.
Modifier 25 applies to the E/M code, not the CPT 43235 line, when a separately identifiable evaluation service was performed the same day. Do not use Modifier 59 to bypass NCCI bundling pairs for EGD family codes.
Is CPT code 43235 considered surgery?
Yes. CPT 43235 falls under the Surgery section of the CPT manual, within the Digestive System endoscopic procedures. Despite the surgical classification, it’s a minimally invasive outpatient procedure. For billing purposes, it carries a 0-day global period, meaning no pre-procedure or post-procedure E/M visits are bundled into the payment.
What is the global period for CPT 43235?
Zero days. CPT 43235 carries a 0-day global period, which means no pre-procedure or post-procedure evaluation and management visits are bundled into the code payment. A patient who returns the following day for an unrelated complaint generates a separately billable visit. A patient who returns for a complication of the EGD also generates a separately billable visit.
Is modifier 52 or 53 for incomplete EGD?
Modifier 52 applies when the physician makes a discretionary decision to reduce or stop the EGD, such as when a tight esophageal stricture prevents the scope from reaching D2 and no therapeutic intervention was performed.
Modifier 53 applies when the procedure was discontinued after anesthesia induction because of a patient safety event, such as hypoxia or cardiac instability. The clinical trigger for the stop determines which modifier is correct.
What is the Medicare reimbursement for CPT 43235 in 2026?
The 2026 Medicare national average for CPT 43235 at a hospital outpatient department is $1,036 total approved, with Medicare paying $829 and the patient paying a $207 copay.
The 2026 conversion factor is $33.57 for qualifying APM participants and $33.40 for non-qualifying participants. CPT 43235 carries 2.39 work RVUs under the 2026 fee schedule. Use the Medicare.gov Procedure Price Lookup to verify the rate in your locality.
Is CPT 43235 related to gastroenterology?
Yes. CPT 43235 falls within the gastroenterology CPT code range (43235 through 43259 and 43270), which describes EGD procedures performed by gastroenterologists and GI-focused general surgeons. Internists and other providers credentialed to perform upper GI endoscopy also use this code. It’s most often billed in ambulatory surgical centers and hospital outpatient departments.
Sources
- CMS NCCI Policy Manual Chapter 6, Digestive System, 2026 (endoscopy bundling rules, integral services)
- LCD L35350 Upper GI Endoscopy (coverage criteria, indications)
- CMS Billing and Coding Article A57414 (ICD-10 coverage status for CPT 43235)
- ASGE EGD CPT Coding Reference (AMA code descriptors 43235, 43239)
- Medicare.gov Procedure Price Lookup: CPT 43235 (2026 national average payment data)
- CMS Physician Fee Schedule Look-Up Tool (locality-adjusted rates, RVU data)
- AMA CPT 2026 (code descriptors for 43235, 43239, 43889, 43255, 43249)
- CMS CY 2026 Physician Fee Schedule Final Rule (CMS-1846-F): conversion factors $33.57/$33.40, 2.39 work RVUs for CPT 43235)
