ICD-10 K81.9
Billable / SpecificCholecystitis, unspecified
About ICD-10-CM K81.9
ICD-10-CM code K81.9 represents Cholecystitis, unspecified. This is a billable/specific code in the Digestive System chapter (block K81). The 2026 edition of ICD-10-CM K81.9 became effective on October 1, 2025.
Medicare LCD Coverage for K81.9
Local Coverage Determinations (LCDs) from CMS MACs that list K81.9 as a covered diagnosis.
Showing top 9. Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing K81.9.
1 Medicare
1 Aetna
CPT Codes Commonly Billed with K81.9
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert K81.9 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| K81.9 | 57510 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To K81.9
Other codes in section K80-K87 (Disorders of gallbladder, biliary tract and pancreas).
ICD-10 K81.9, Billing FAQ
Is ICD-10 code K81.9 billable? +
Yes, K81.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does K81.9 map to? +
Per CMS GEMs, K81.9 maps to ICD-9 codes: 57510. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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