MCMedicalCodingSoftware
K21.0

K21.0: Gastro-esophageal reflux disease with esophagitis

Non-billable headerICD-10-CM

K21.0 is a non-billable header ICD-10-CM code for gastro-esophageal reflux disease with esophagitis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above K21.0

A category’s note binds every code beneath it.

Written on K21: Gastro-esophageal reflux disease

  • newborn esophageal reflux (P78.83)

Other codes that can never be billed with K21.0

Their own Excludes1 notes name this code, so the conflict is not listed above.

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

The condition this code belongs to

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead K21.0

2 child codes. Green means billable.

Other codes under K21

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.