R12

ICD-10Billable

Heartburn

Official ICD-10-CM descriptor (FY2026)

Heartburn

R12 is valid for submission on a claim — CMS flags it as a billable, specific code.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

dyspepsia NOS (R10.13)
functional dyspepsia (K30)

Where this code sits

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: Symptoms and signs involving the digestive system and abdomen (R10-R19)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.