2027 ICD-10-CM Diagnosis Code D01.3Carcinoma in situ of anus and anal canal
ICD-10-CM Codes›C00–D49›D00-D09›D01
- Billable — Valid for Submission
- Chronic Condition
D01.3 is a billable ICD-10-CM diagnosis code for carcinoma in situ of anus and anal canal. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 374 through 376. Coders also document this condition as bowenoid papulosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastrointestinal cancers - anus.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bowenoid papulosis
- Bowenoid papulosis of anus
- Carcinoma in situ of anal canal
- Carcinoma in situ of anus
- Carcinoma in situ of perianal skin
- Intraepithelial neoplasia due to human papillomavirus
- Intraepithelial squamous cell carcinoma of anogenital region
- Squamous cell carcinoma in situ of skin of perianal area
- Squamous cell carcinoma in situ of skin of trunk
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D01.3: its own notes plus those printed at D01, block D00-D09, and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- Bowen's disease
- erythroplasia
- grade III intraepithelial neoplasia
- Queyrat's erythroplasia
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Anal intraepithelial neoplasia III [AIN III]
- Severe dysplasia of anus
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Notes
General instructions on how these codes are used.
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name D01.3, its category, or a range that includes it.
Applicable To 1
These notes mention D01.3.
Excludes1 7
These codes carry an Excludes1 note naming D01.3: they are not reported together with it, unless the two conditions are unrelated.
- D04.5 Carcinoma in situ of skin of trunkcarcinoma in situ of anus NOS (D01.3)
- K62.82 Dysplasia of anusanal intraepithelial neoplasia III (D01.3)
- K62.82 Dysplasia of anuscarcinoma in situ of anus (D01.3)
- K62.82 Dysplasia of anussevere dysplasia of anus (D01.3)
- R85.61 Abnormal cytologic smear of anuscarcinoma in situ of anus (histologically confirmed) (D01.3)
- R85.61 Abnormal cytologic smear of anusanal intraepithelial neoplasia III [AIN III] (D01.3)
- R85.61 Abnormal cytologic smear of anussevere dysplasia of anus (histologically confirmed) (D01.3)
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Dysplasia See Also: Anomaly;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| anorectum, anorectal (junction) | C21.8 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| anus, anal | C21.0 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| anus, anal › canal | C21.1 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| anus, anal › cloacogenic zone | C21.2 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| anus, anal › sphincter | C21.1 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| canal › anal | C21.1 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| cloacogenic zone | C21.2 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| crypt of Morgagni | C21.8 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| hemorrhoidal zone | C21.1 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| junction › anorectal | C21.8 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
| sphincter › anal | C21.1 | C78.5 | D01.3 | D12.9 | D37.8 | D49.0 |
Patient EducationClinical
Anal Cancer
Your anus is the opening at the end of your large intestine. It is where stool (poop) leaves your body. The anus is formed partly from your outer layers of skin and partly from your intestine. Anal cancer is a type of cancer that forms in the tissues of your anus.
The full article covers:
- What is anal cancer?
- Who is more likely to develop anal cancer?
- What are the symptoms of anal cancer?
- How is anal cancer diagnosed?
- What are the treatments for anal cancer?
- Can anal cancer be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D01.3 to ICD-9-CMHistory
Code HistoryHistory
Questions About D01.3Overview
What is the ICD-10 code for carcinoma in situ of anus and anal canal?
The ICD-10-CM code for carcinoma in situ of anus and anal canal is D01.3 (sometimes written as D013). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D01.3 (Carcinoma in situ of other and unspecified digestive organs) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of anus and anal canal on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D01.3 group to?
When carcinoma in situ of anus and anal canal is the principal diagnosis on an inpatient stay, it groups to MS-DRG 375, 374, 376, with relative weights from 0.8925 to 2.1101 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D01.3 be reported with K62.82?
Not as a rule. The Excludes1 note on D01.3 lists "anal intraepithelial neoplasia I and II [AIN I and AIN II] (K62.82)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of D01.3?
Under the General Equivalence Mappings, carcinoma in situ of anus and anal canal converts to ICD-9-CM 230.5 (ca in situ anal canal) and 230.6 (ca in situ anus NOS). The mapping is approximate, so confirm the match fits the documentation.
