K21
K21: Gastro-esophageal reflux disease
Non-billable headerICD-10-CM
K21 is a non-billable header ICD-10-CM code for gastro-esophageal reflux disease. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- newborn esophageal reflux (P78.83)
Other codes that can never be billed with K21
Their own Excludes1 notes name this code, so the conflict is not listed above.
- K20Esophagitis
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
2 child codes. Green means billable.