ICD-10 L10.9
Billable / Specific CCPemphigus, unspecified
About ICD-10-CM L10.9
ICD-10-CM code L10.9 represents Pemphigus, unspecified. This is a billable/specific code in the Skin and Subcutaneous Tissue chapter (block L10). The 2026 edition of ICD-10-CM L10.9 became effective on October 1, 2025.
Coding Tips for L10.9
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
L10.9 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inpatient DRG Impact, CC
codes Pemphigus, unspecified. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for L10.9
Local Coverage Determinations (LCDs) from CMS MACs that list L10.9 as a covered diagnosis.
Showing top 10 of 109 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing L10.9.
5 Medicare
2 Aetna
CPT Codes Commonly Billed with L10.9
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 11104 Punch biopsy skin — uncertain skin neoplasm, skin cancer, melanoma, nevi, psoriasis, lupus, connective tissue disorder, pemphigus, bullous pemphigoid Dermatology
Convert L10.9 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 |
|---|---|---|
| L10.9 | 6944 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To L10.9
Other codes in section L10-L14 (Bullous disorders).
ICD-10 L10.9, Billing FAQ
Is ICD-10 code L10.9 billable? +
Yes, L10.9 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is L10.9 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with L10.9? +
Procedures frequently paired with L10.9 include: 11104.
What ICD-9 codes does L10.9 map to? +
Per CMS GEMs, L10.9 maps to ICD-9 codes: 6944. 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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