K21 Gastro-esophageal reflux disease

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Gastro-esophageal reflux disease is K21 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
K20-K31: Diseases of esophagus, stomach and duodenum (K20-K31)
Category K21
5 codes (3 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with K21.
  • newborn esophageal reflux (P78.83)

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.11

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference K21 with the canonical source and edition:

K21 — Gastro-esophageal reflux disease. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/K21

Canonical URL: https://icd10codingpro.com/codes/K21

Related Codes

More Specific Codes

K21.0 Gastro-esophageal reflux disease with esophagitis K21.9 Gastro-esophageal reflux disease without esophagitis

All Codes in K21

Every most-specific code under K21 Gastro-esophageal reflux disease (3 codes):

Show the complete K21 code list
K21.00 Gastro-esophageal reflux disease with esophagitis, without bleeding K21.01 Gastro-esophageal reflux disease with esophagitis, with bleeding K21.9 Gastro-esophageal reflux disease without esophagitis
Search all 70,000+ ICD-10-CM codes →
Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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