R12 — ICD-10-CM Diagnosis Codes

R12 Heartburn billable

ICD-10-CM and ICD-10-PCS are maintained by CMS/CDC-NCHS; HCPCS Level II by CMS — all public-domain US code sets. Data shown from release FY2026. This site is a reference tool, not medical or billing advice, and is not affiliated with or endorsed by CMS or any government agency.