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K21.0

Non-billable

Gastro-esophageal reflux disease with esophagitis

K21.0 is the ICD-10-CM code for Gastro-esophageal reflux disease with esophagitis. It is a non-billable category code — use a more specific child code such as K21.00 for billing.

Status
Header (non-billable)
Chapter
K00-K95
Parent
K21
Subcodes
2
Edition
FY2026

K00-K95 Diseases of the digestive system

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code K21.0?
K21.0 is the ICD-10-CM code for "Gastro-esophageal reflux disease with esophagitis". It falls under K00-K95 Diseases of the digestive system.
Is K21.0 a billable code?
No — K21.0 is a non-billable header code. Use a more specific child code (such as K21.00) for billing.
What are the subcodes of K21.0?
K21.0 has 2 more specific child codes, including K21.00, K21.01.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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