All ICD10 Codes
ICD-10-CM · Chapter 11 · K00–K95

GERD ICD-10-CM Codes

ICD-10-CM codes for gastro-esophageal reflux disease (GERD), with and without esophagitis.

5Total codes
3Billable
2026FY

Coding Guidance for GERD

K21.9 (GERD without esophagitis) is the most frequently assigned code and the default when esophagitis is not documented. K21.0x is used when reflux esophagitis is confirmed, with the sixth character reporting whether bleeding is present (K21.00 without, K21.01 with).

Barrett's esophagus, a possible complication of chronic GERD, is coded separately in category K22.7 and should not be reported with an esophagitis code unless both are documented.

5 codes — FY2026 ICD-10-CMEffective April 1, 2026
K21Gastro-esophageal reflux diseaseNon-BillableK21.0Gastro-esophageal reflux disease with esophagitisNon-BillableK21.00Gastro-esophageal reflux disease with esophagitis, without bleedingBillableK21.01Gastro-esophageal reflux disease with esophagitis, with bleedingBillableK21.9Gastro-esophageal reflux disease without esophagitisBillable

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About these codes

These ICD-10-CM codes are sourced from the official FY2026 tabular list published by the Centers for Medicare & Medicaid Services (CMS), effective April 1, 2026. Click any code for full clinical details including instructional notes, excludes guidance, and DRG mappings.

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