ICD-10 L05.91
Billable / SpecificPilonidal cyst without abscess
About ICD-10-CM L05.91
ICD-10-CM code L05.91 represents Pilonidal cyst without abscess. This is a billable/specific code in the Skin and Subcutaneous Tissue chapter (block L05). The 2026 edition of ICD-10-CM L05.91 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under L05.91. Per CMS ICD-10-CM Tabular 2026.
- Pilonidal dimple
- Postanal dimple
- Pilonidal cyst NOS
Type 2 Excludes
Not included here, the excluded code is not part of L05.91, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- congenital sacral dimple (Q82.6)
- parasacral dimple (Q82.6)
Medicare LCD Coverage for L05.91
Local Coverage Determinations (LCDs) from CMS MACs that list L05.91 as a covered diagnosis.
Showing top 7. Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing L05.91.
1 Medicare
CPT Codes Commonly Billed with L05.91
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 L05.91 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 |
|---|---|---|
| L05.91 | 6851 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To L05.91
Other codes in section L00-L08 (Infections of the skin and subcutaneous tissue).
ICD-10 L05.91, Billing FAQ
Is ICD-10 code L05.91 billable? +
Yes, L05.91 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to L05.91? +
ICD-10 L05.91 includes: Pilonidal dimple; Postanal dimple; Pilonidal cyst NOS.
What codes are Type 2 Excludes for L05.91? +
Type 2 Excludes (may be coded together when both conditions exist): congenital sacral dimple (Q82.6); parasacral dimple (Q82.6)
What ICD-9 codes does L05.91 map to? +
Per CMS GEMs, L05.91 maps to ICD-9 codes: 6851. 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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