ICD-10-CM 2027
ICD-10 code for overgrowth
Choose a code from the options below based on the documentation.
From the official ICD-10-CM alphabetic index entry “Overgrowth”. Page updated September 29, 2026.
About coding overgrowth
The official ICD-10-CM index doesn't give a single default code for overgrowth; the code depends on the details below.
More specific overgrowth codes (official index)
- bacterial
- small intestinal K63.8219 — Small intestinal bacterial overgrowth, unspecified
- hydrogen-subtype K63.8211 — Small intestinal bacterial overgrowth, hydrogen-subtype
- hydrogen sulfide-subtype K63.8212 — Small intestinal bacterial overgrowth, hydrogen sulfide-subtype
- bone
- fungal
- small intestinal K63.822 — Small intestinal fungal overgrowth
- intestinal methanogen K63.829 — Intestinal methanogen overgrowth, unspecified
Common questions about overgrowth ICD-10 codes
What is the ICD-10 code for intestinal methanogen overgrowth?
- K63.829 — Intestinal methanogen overgrowth, unspecified.