CPT Code 43239 (EGD With Biopsy): Billing, Modifiers, and 2026 Reimbursement

What Is CPT Code 43239?

CPT code 43239 is a gastroenterology procedure code that reports a flexible upper endoscopy (esophagogastroduodenoscopy, or EGD) performed through the mouth with one or more biopsies of the esophagus, stomach, or duodenum. It is one of the most common upper GI codes billed, and it is reported only once per session no matter how many biopsies are taken. Because it is a surgical endoscopy code, it replaces the diagnostic EGD code 43235 whenever a biopsy is performed.

Report it once: 43239 covers a single biopsy or many biopsies from multiple sites in the same session. You do not bill it per specimen or per site.

It replaces 43235: When a biopsy is taken, bill 43239, not 43235 plus 43239. Surgical endoscopy always includes the diagnostic exam.

Reimbursement follows the setting: The 2026 payment ranges from about $420 in an office to about $927 in a hospital outpatient department, and the multiple endoscopy rule reduces any second EGD in the same session.

CPT 43239 looks simple and bills often, which is exactly why it is one of the highest-denial codes in gastroenterology. Analyses of Medicare Part B data show roughly 930,000 claims for 43239 in 2023 and a denial rate above 16%, driven mostly by diagnosis linkage, documentation gaps, and modifier errors. Get the biopsy documentation, the code selection, and the multiple endoscopy math right and most of those denials disappear. Here is how to bill 43239 cleanly in 2026.

When Should You Bill 43239 Instead of 43235?

Bill 43239 whenever a biopsy is taken during an upper endoscopy, and bill 43235 only when the EGD is purely diagnostic with no tissue removed. If the endoscopist takes forceps biopsies, 43239 is the correct code and it replaces 43235; you never report both together. Brushings or washings alone stay under 43235.

This is the single most misunderstood point in EGD coding, and it flows from a rule that runs through the entire endoscopy family: surgical endoscopy always includes the diagnostic endoscopy. The moment a biopsy, polyp removal, dilation, or bleeding control happens, the interventional code supersedes 43235. A note that says the physician took gastric antrum biopsies for H. pylori maps to 43239 alone, not 43235 plus 43239. Cytology collected by brushing or washing does not count as a biopsy for this purpose; if that is all that was done, the code is 43235. Choosing the code correctly starts with one question in the procedure note: was tissue actually sampled with forceps? For a broader look at how diagnostic endoscopy codes work across the GI family, see our guide to CPT 45378 for diagnostic colonoscopy.

How Much Does CPT 43239 Reimburse in 2026?

CPT 43239 pays roughly $420 as a physician office (non-facility) global payment in 2026, but the code is almost always performed in a facility. In an ambulatory surgery center the facility fee is about $498, and in a hospital outpatient department it is about $927, based on national average Medicare rates, with the physician billing a separate professional fee.

Setting	2026 National Payment	Paid To
Physician office (non-facility)	About $420 (global)	The physician
Ambulatory surgery center (ASC)	About $498 (facility fee)	The ASC
Hospital outpatient (HOPD)	About $927 (facility fee)	The hospital

In an ASC or hospital outpatient department, the physician bills a separate, lower professional fee under the Physician Fee Schedule facility rate, while the facility bills the numbers above. Those figures move with the 2026 Medicare conversion factors, which for the first time split into two: $33.57 for practices in a qualifying Advanced Payment Model and $33.40 for everyone else, per the CMS CY2026 Physician Fee Schedule final rule (CMS-1832-F). 43239 carries about 12.54 total RVUs and a work RVU of 2.33, with a 000 global period, meaning no separate follow-up window is bundled into the payment. Where the procedure is performed drives the number far more than the conversion factor does, so site of service is the first thing to confirm on any 43239 claim. For the latest on how the 2027 proposed rule could change GI reimbursement further, see our coverage of 2027 Medicare GI payment changes.

How Does the Multiple Endoscopy Rule Affect 43239?

When 43239 is billed with another endoscopy from the same EGD family in the same session, Medicare’s multiple endoscopy rule applies. The highest-valued procedure is paid in full, and each additional EGD is paid at a reduced amount: the payer subtracts the value of the base diagnostic endoscopy (43235) from the second code rather than paying it in full.

Every code in the 43235 to 43270 family shares the same base, the diagnostic EGD (43235). The payer will not pay that base value twice in one session, so second and subsequent endoscopies are discounted. On facility claims, secondary endoscopic procedures are commonly reduced by about 50%.

Consider a real example. A gastroenterologist performs an EGD, takes gastric biopsies (43239), and at a distinct duodenal site removes a polyp by snare (43251) in the same session. Both are payable. The payer pays the higher-valued procedure in full, then pays the second minus the base endoscopy value, so the additive total you might expect does not arrive. Bill both at full value assuming they stack and the remittance will fall short. Worse, if you omit modifier 59 (or XS) on the distinct-site procedure, the second line can be denied outright. Coding the multiple endoscopy math correctly, and appending the distinct-service modifier with site documentation, is the difference between a clean payment and a partial one.

Which Modifiers Apply to CPT 43239?

43239 needs a modifier far less often than coders think, and misapplied modifiers are a leading denial source. Note first that modifiers 26 and TC do not apply: 43239 is a global surgical code, not a split professional and technical service like radiology. The modifiers that do come up:

Modifier 59 or XS: Append when 43239 is reported with a therapeutic EGD performed at a distinct anatomic site in the same session. The note must clearly establish different sites. Without it, the codes bundle under NCCI edits.

Modifier 51: Use for multiple procedures in the same session where the payer requires it, understanding that the multiple endoscopy reduction still applies to payment.

Modifier 22: Append when the biopsy required substantially greater work than usual, with documentation that justifies the added effort.

Modifier 52: Use when the scope could not be advanced to the duodenum despite a good-faith attempt, which is a reduced service. For a full breakdown of when and how to use this modifier across GI codes, see our modifier 52 billing guide.

Modifier 53 (or 74 in a facility): Use modifier 53 in the physician setting when the procedure is discontinued due to a patient complication before completion. In an ASC or hospital outpatient setting, use modifier 74 once anesthesia has been administered.

Does CPT 43239 Need Prior Authorization?

Traditional Medicare does not require prior authorization for 43239, but a growing number of commercial payers do. Cigna requires prior authorization for a broad list of EGD codes including 43239, and several Blue Cross plans require it for outpatient EGD. UnitedHealthcare uses an advance notification process instead of prior auth for non-screening EGDs.

Payer	43239 Prior Authorization	Program or Notes
Cigna (commercial and MA)	Required	Managed through eviCore / CareCore National
Blue Cross plans (many)	Often required	Reviewed against GI clinical guidelines via Carelon
UnitedHealthcare (commercial)	Advance notification, not prior auth	Required for Gold Card eligibility
Traditional Medicare	Not required	Coverage governed by local coverage determinations

Because policies differ sharply and change often, verify the specific patient’s plan before scheduling. A missed prior authorization is one of the few 43239 denials that cannot be appealed on documentation alone, so it belongs in your pre-service workflow, not your billing cleanup.

Which ICD-10 Codes Support CPT 43239?

43239 must be linked to a diagnosis that justifies a biopsy, and payers deny claims when the diagnosis is vague, unspecified, or unsupported. Many MAC local coverage determinations, such as LCD A57414, publish approved diagnosis lists. Codes that commonly support 43239 include:

K21.9: GERD without esophagitis, for evaluating chronic reflux and possible mucosal damage.

K22.70: Barrett’s esophagus without dysplasia, for surveillance biopsies.

R13.10: Dysphagia unspecified, for working up difficulty swallowing.

D50.9: Iron deficiency anemia, for evaluating suspected occult GI blood loss.

K92.1: Melena, for identifying a source of upper GI bleeding.

K29.70: Gastritis unspecified without bleeding, to confirm inflammation and test for H. pylori.

Always match the code to the documented indication and confirm it appears on your MAC’s LCD or the commercial payer’s covered list. A medically necessary procedure still gets denied when the diagnosis link is weak.

Why Do CPT 43239 Claims Get Denied?

Most 43239 denials trace back to a short, predictable list:

Diagnosis does not support medical necessity: A vague or unspecified code, such as nonspecific abdominal discomfort, fails the payer’s biopsy criteria. Fix it by linking a specific covered diagnosis.

Documentation does not confirm the biopsy: The note omits the biopsy site, purpose, or the fact that tissue was sampled. Fix it by documenting site, technique, and clinical reason.

43235 billed with 43239: Reporting the diagnostic base alongside the biopsy code triggers a bundling edit. Fix it by billing 43239 alone when a biopsy is taken.

Overlapping EGD codes without distinction: Multiple EGD-family codes without modifier 59 or XS and distinct-site documentation get bundled. Fix it by adding the modifier and separating the sites in the note.

Missing or misused modifier: Applying 26, TC, or an unjustified modifier draws rejections. Fix it by using modifiers only when the record supports them.

Missed prior authorization: An elective EGD at a payer that requires prior auth denies for no authorization. Fix it by verifying and obtaining authorization before the procedure.

Frequently Asked Questions