K63: Other diseases of intestine

Codes under K63 (Other diseases of intestine). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
K63.0	Abscess of intestine	✓
K63.1	Perforation of intestine (nontraumatic)	✓
K63.2	Fistula of intestine	✓
K63.3	Ulcer of intestine	✓
K63.4	Enteroptosis	✓
K63.5	Polyp of colon	✓
K63.8	Other specified diseases of intestine	—
K63.9	Disease of intestine, unspecified	✓
K63.81	Dieulafoy lesion of intestine	✓
K63.82	Intestinal microbial overgrowth	—
K63.89	Other specified diseases of intestine	✓
K63.821	Small intestinal bacterial overgrowth	—
K63.822	Small intestinal fungal overgrowth	✓
K63.829	Intestinal methanogen overgrowth, unspecified	✓
K63.8211	Small intestinal bacterial overgrowth, hydrogen-subtype	✓
K63.8212	Small intestinal bacterial overgrowth, hydrogen sulfide-subtype	✓
K63.8219	Small intestinal bacterial overgrowth, unspecified	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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