ICD-10 L27.9
Billable / SpecificDermatitis due to unspecified substance taken internally
About ICD-10-CM L27.9
ICD-10-CM code L27.9 represents Dermatitis due to unspecified substance taken internally. This is a billable/specific code in the Skin and Subcutaneous Tissue chapter (block L27). The 2026 edition of ICD-10-CM L27.9 became effective on October 1, 2025.
Medicare LCD Coverage for L27.9
Local Coverage Determinations (LCDs) from CMS MACs that list L27.9 as a covered diagnosis.
Showing top 10 of 125 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing L27.9.
5 Medicare
CPT Codes Commonly Billed with L27.9
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 L27.9 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 |
|---|---|---|
| L27.9 | 6939 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To L27.9
Other codes in section L20-L30 (Dermatitis and eczema).
ICD-10 L27.9, Billing FAQ
Is ICD-10 code L27.9 billable? +
Yes, L27.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does L27.9 map to? +
Per CMS GEMs, L27.9 maps to ICD-9 codes: 6939. 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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