K58: Irritable bowel syndrome
Codes under K58 (Irritable bowel syndrome). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| K58.0 | Irritable bowel syndrome with diarrhea | ✓ |
| K58.0 | Irritable bowel syndrome with diarrhea | ✓ |
| K58.1 | Irritable bowel syndrome with constipation | ✓ |
| K58.1 | Irritable bowel syndrome with constipation | ✓ |
| K58.2 | Mixed irritable bowel syndrome | ✓ |
| K58.2 | Mixed irritable bowel syndrome | ✓ |
| K58.8 | Other irritable bowel syndrome | ✓ |
| K58.8 | Other irritable bowel syndrome | ✓ |
| K58.9 | Irritable bowel syndrome, unspecified | ✓ |
| K58.9 | Irritable bowel syndrome, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code K58?
K58 is an ICD-10-CM category covering Irritable bowel syndrome. It contains 10 more specific diagnosis codes, 10 of which are billable.
Is K58 a billable code?
No — K58 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 K58.0 — Irritable bowel syndrome with diarrhea). 10 of the 10 codes under K58 are billable.
What codes fall under K58?
K58 includes K58.0, K58.0, K58.1, K58.1, K58.2, plus 5 more. See the full list with descriptions and billable status above.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free