2027 ICD-10-CM Diagnosis Code D12.9Benign neoplasm of anus and anal canal
ICD-10-CM Codes›C00–D49›D10-D36›D12
- Billable — Valid for Submission
- Not Chronic
D12.9 is a billable ICD-10-CM diagnosis code for benign neoplasm 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 393 through 395. Coders also document this condition as anorectal tubulovillous adenoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Anorectal tubulovillous adenoma
- Benign neoplasm of anal canal
- Benign neoplasm of anus
- Benign neoplasm of rectum
- Benign neoplasm of rectum and anal canal
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D12.9: its own notes plus those printed at D12 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
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.
- Benign neoplasm of anus NOS
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
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 D12.9, its category, or a range that includes it.
Applicable To 2
These notes mention D12.9.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Benign Colon Neoplasm
a neoplasm that arises from the colon and is characterized by the absence of atypical or malignant cytological and architectural features, and absence of invasive features or metastatic potential.
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 Disorders
Your anus is the opening at the end of your large intestine. It is where stool (poop) leaves your body.
The full article covers:
- What is the anus?
- What are anal disorders?
- What are the symptoms of anal disorders?
- How are anal disorders diagnosed?
- How are anal disorders treated?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D12.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D12.9Overview
What is the ICD-10 code for benign neoplasm of anus and anal canal?
The ICD-10-CM code for benign neoplasm of anus and anal canal is D12.9 (sometimes written as D129). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D12.9 (Benign neoplasm of colon, rectum, anus and anal canal) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report benign neoplasm of anus and anal canal on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D12.9 group to?
When benign neoplasm of anus and anal canal is the principal diagnosis on an inpatient stay, it groups to MS-DRG 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D12.9 be reported with D22.5?
Not as a rule. The Excludes1 note on D12.9 lists "benign neoplasm of anal margin (D22.5, D23.5)". 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 D12.9?
Under the General Equivalence Mappings, benign neoplasm of anus and anal canal converts to ICD-9-CM 211.4 (benign neopl rectum/anus). The mapping is approximate, so confirm the match fits the documentation.
