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 | ✓ |
| K63.0 | Abscess of intestine | ✓ |
| K63.1 | Perforation of intestine (nontraumatic) | ✓ |
| K63.1 | Perforation of intestine (nontraumatic) | ✓ |
| K63.2 | Fistula of intestine | ✓ |
| K63.2 | Fistula of intestine | ✓ |
| K63.3 | Ulcer of intestine | ✓ |
| K63.3 | Ulcer of intestine | ✓ |
| K63.4 | Enteroptosis | ✓ |
| K63.4 | Enteroptosis | ✓ |
| K63.5 | Polyp of colon | ✓ |
| K63.5 | Polyp of colon | ✓ |
| K63.8 | Other specified diseases of intestine | — |
| K63.8 | Other specified diseases of intestine | — |
| K63.9 | Disease of intestine, unspecified | ✓ |
| K63.9 | Disease of intestine, unspecified | ✓ |
| K63.81 | Dieulafoy lesion of intestine | ✓ |
| K63.81 | Dieulafoy lesion of intestine | ✓ |
| K63.82 | Intestinal microbial overgrowth | — |
| K63.82 | Intestinal microbial overgrowth | — |
| K63.89 | Other specified diseases of intestine | ✓ |
| K63.89 | Other specified diseases of intestine | ✓ |
| K63.821 | Small intestinal bacterial overgrowth | — |
| K63.821 | Small intestinal bacterial overgrowth | — |
| K63.822 | Small intestinal fungal overgrowth | ✓ |
| K63.822 | Small intestinal fungal overgrowth | ✓ |
| K63.829 | Intestinal methanogen overgrowth, unspecified | ✓ |
| K63.829 | Intestinal methanogen overgrowth, unspecified | ✓ |
| K63.8211 | Small intestinal bacterial overgrowth, hydrogen-subtype | ✓ |
| K63.8211 | Small intestinal bacterial overgrowth, hydrogen-subtype | ✓ |
| K63.8212 | Small intestinal bacterial overgrowth, hydrogen sulfide-subtype | ✓ |
| K63.8212 | Small intestinal bacterial overgrowth, hydrogen sulfide-subtype | ✓ |
| K63.8219 | Small intestinal bacterial overgrowth, unspecified | ✓ |
| K63.8219 | Small intestinal bacterial overgrowth, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code K63?
K63 is an ICD-10-CM category covering Other diseases of intestine. It contains 34 more specific diagnosis codes, 28 of which are billable.
Is K63 a billable code?
No — K63 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example K63.0 — Abscess of intestine). 28 of the 34 codes under K63 are billable.
What codes fall under K63?
K63 includes K63.0, K63.0, K63.1, K63.1, K63.2, plus 29 more. See the full list with descriptions and billable status above.
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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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