ICD-10 D04.20
Billable / SpecificCarcinoma in situ of skin of unspecified ear and external auricular canal
About ICD-10-CM D04.20
ICD-10-CM code D04.20 represents Carcinoma in situ of skin of unspecified ear and external auricular canal. This is a billable/specific code in the Neoplasms chapter (block D04). The 2026 edition of ICD-10-CM D04.20 became effective on October 1, 2025.
Medicare LCD Coverage for D04.20
Local Coverage Determinations (LCDs) from CMS MACs that list D04.20 as a covered diagnosis.
Showing top 10 of 203 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing D04.20.
5 Medicare
1 Aetna
CPT Codes Commonly Billed with D04.20
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 D04.20 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 |
|---|---|---|
| D04.20 | 2322 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To D04.20
Other codes in section D00-D09 (In situ neoplasms).
ICD-10 D04.20, Billing FAQ
Is ICD-10 code D04.20 billable? +
Yes, D04.20 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does D04.20 map to? +
Per CMS GEMs, D04.20 maps to ICD-9 codes: 2322. 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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