2026 ICD-10-CM Diagnosis Code D01.9Carcinoma in situ of digestive organ, unspecified
ICD-10-CM Codes›C00–D49›D00-D09›D01
- Billable — Valid for Submission
- Chronic Condition
D01.9 is a billable ICD-10-CM diagnosis code for carcinoma in situ of digestive organ, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 374 through 376. Coders also document this condition as carcinoma in situ of digestive organ. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastrointestinal cancers - all other types.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Carcinoma in situ of digestive organ
- Carcinoma in situ of gastrointestinal tract
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. |
|---|---|---|---|---|---|---|
| alimentary canal or tract NEC | C26.9 | C78.80 | D01.9 | D13.99 | D37.9 | D49.0 |
| digestive organs, system, tube, or tract NEC | C26.9 | C78.89 | D01.9 | D13.99 | D37.9 | D49.0 |
| gastrocolic | C26.9 | C78.89 | D01.9 | D13.99 | D37.9 | D49.0 |
| gastrointestinal (tract) NEC | C26.9 | C78.89 | D01.9 | D13.99 | D37.9 | D49.0 |
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Convert D01.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D01.9Overview
Is D01.9 (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 digestive organ, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D01.9 group to?
When carcinoma in situ of digestive organ, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 374, 375, 376, with relative weights from 0.9243 to 2.1387 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D01.9?
Under the General Equivalence Mappings, carcinoma in situ of digestive organ, unspecified converts to ICD-9-CM 230.9 (ca in situ GI NEC/NOS). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
