ICD-10-CM · Chapter 18 · R00-R99
R12 Heartburn
Excludes 1 (cannot be coded together)
- functional dyspepsia (K30)
Excludes 2 (not included here)
- dyspepsia NOS (R10.13)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit R12 directly on claims and documentation without a subcode extension.
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category R12:
- Heartburn — Acidez estomacal
Last reviewed: September 2026