43499 Unlisted procedure, esophagus

CPT Code 43499: Unlisted Procedure, Esophagus

CPT code 43499 represents an unlisted procedure performed on the esophagus. It is utilized when a physician performs an esophageal service that no specific Current Procedural Terminology code adequately describes. Because it lacks a standard definition, coders must submit supporting medical documentation and negotiate reimbursement rates with payers. 3 4

Plain-language overview

Code 43499 is an unlisted procedure code for the esophagus, utilized when no specific CPT code adequately describes the exact service provided to the patient. 3

What this code represents

The code 43499 represents an unlisted procedure, esophagus, and functions as a reporting mechanism for esophageal services lacking a specific, defined Current Procedural Terminology code. 3 4

Coding details

Because unlisted codes lack specific procedural definitions, assigning a modifier to code 43499 is not appropriate according to published coding guidance. 3

When multiple procedures are performed on the same anatomical location, the unlisted code is submitted once, but separate anatomical locations require submitting the unlisted code for each location. 3

Documentation considerations

When billing esophageal injections for achalasia or cardiospasm using 43499, providers must place a description of the procedure in Item 19 on the CMS-1500 claim form or its electronic equivalent. 1

Physicians must submit medical documentation with claims for unlisted codes like 43499 to ensure payment, as these codes do not describe specific procedures. 3

Coverage and utilization context

Unlike codes with preset values, physicians must negotiate reimbursement rates with payors for unlisted codes, meaning submitting 43499 does not guarantee a standard payment amount. 3

What the sources add

Clinical coding guidance states that physicians must negotiate rates with payors for unlisted codes, while a separate federal rate-setting document lists a payment value of $3,538.07 for code 43499. 2 3

Clinical coding resources identify 43499 as the unlisted procedure code for the esophagus, distinguishing it from 43289, which is designated specifically for unlisted laparoscopy procedures of the esophagus. 4

Sources

1. Coding Guidelines — downloads.cms.gov; accessed 2026-07-27.
2. 1 2010 APC PANEL VER E - ADDB 03 — cms.gov; accessed 2026-07-27.
3. Guidance for Billing Unlisted Codes — webfiles.gi.org; accessed 2026-07-27.
4. CATEGORY III & UNLISTED CODES — entnet.org; accessed 2026-07-27.