K21
Non-billableGastro-esophageal reflux disease
K21 is the ICD-10-CM code for Gastro-esophageal reflux disease. It is a non-billable category code — use a more specific child code such as K21.0 for billing.
- Status
- Header (non-billable)
- Chapter
- K00-K95
- Subcodes
- 2
- Edition
- FY2026
K00-K95 Diseases of the digestive system
Excludes1 — not coded here
- •newborn esophageal reflux (P78.83)
Frequently asked questions
- What is ICD-10 code K21?
- K21 is the ICD-10-CM code for "Gastro-esophageal reflux disease". It falls under K00-K95 Diseases of the digestive system.
- Is K21 a billable code?
- No — K21 is a non-billable header code. Use a more specific child code (such as K21.0) for billing.
- What is excluded from K21?
- Excludes1 (not coded here): newborn esophageal reflux (P78.83).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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