K81: Cholecystitis
Codes under K81 (Cholecystitis). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| K81.0 | Acute cholecystitis | ✓ |
| K81.0 | Acute cholecystitis | ✓ |
| K81.1 | Chronic cholecystitis | ✓ |
| K81.1 | Chronic cholecystitis | ✓ |
| K81.2 | Acute cholecystitis with chronic cholecystitis | ✓ |
| K81.2 | Acute cholecystitis with chronic cholecystitis | ✓ |
| K81.9 | Cholecystitis, unspecified | ✓ |
| K81.9 | Cholecystitis, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code K81?
K81 is an ICD-10-CM category covering Cholecystitis. It contains 8 more specific diagnosis codes, 8 of which are billable.
Is K81 a billable code?
No — K81 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 K81.0 — Acute cholecystitis). 8 of the 8 codes under K81 are billable.
What codes fall under K81?
K81 includes K81.0, K81.0, K81.1, K81.1, K81.2, plus 3 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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