ICD-10 D01.3
Billable / SpecificCarcinoma in situ of anus and anal canal
About ICD-10-CM D01.3
ICD-10-CM code D01.3 represents Carcinoma in situ of anus and anal canal. This is a billable/specific code in the Neoplasms chapter (block D01). The 2026 edition of ICD-10-CM D01.3 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under D01.3. Per CMS ICD-10-CM Tabular 2026.
- Anal intraepithelial neoplasia III [AIN III]
- Severe dysplasia of anus
Type 1 Excludes
Pure excludes, these codes can never be coded together with D01.3. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- anal intraepithelial neoplasia I and II [AIN I and AIN II] (K62.82)
- carcinoma in situ of anal margin (D04.5)
- carcinoma in situ of anal skin (D04.5)
- carcinoma in situ of perianal skin (D04.5)
Medicare LCD Coverage for D01.3
Local Coverage Determinations (LCDs) from CMS MACs that list D01.3 as a covered diagnosis.
Showing top 10 of 464 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing D01.3.
1 Aetna
1 Cigna
5 Medicare
CPT Codes Commonly Billed with D01.3
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 44408 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 45379 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 44406 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 45390 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 45392 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 44394 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 44402 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 44390 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 44405 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
- 44388 CMS LCD: Billing and Coding: Diagnostic Colonoscopy CMS LCD
Convert D01.3 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 |
|---|---|---|
| D01.3 | 2305 | 10000 |
| D01.3 | 2306 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To D01.3
Other codes in section D00-D09 (In situ neoplasms).
ICD-10 D01.3, Billing FAQ
Is ICD-10 code D01.3 billable? +
Yes, D01.3 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 D01.3? +
ICD-10 D01.3 includes: Anal intraepithelial neoplasia III [AIN III]; Severe dysplasia of anus.
What codes are Type 1 Excludes for D01.3? +
Type 1 Excludes (never code together with D01.3): anal intraepithelial neoplasia I and II [AIN I and AIN II] (K62.82); carcinoma in situ of anal margin (D04.5); carcinoma in situ of anal skin (D04.5)
What CPT codes are commonly billed with D01.3? +
Procedures frequently paired with D01.3 include: 44408, 45379, 44406, 45390, 45392.
What ICD-9 codes does D01.3 map to? +
Per CMS GEMs, D01.3 maps to ICD-9 codes: 2305, 2306. 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 June 1, 2026.
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