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ICD-10-CM 2027 diagnosis code

D01.40Carcinoma in situ of unspecified part of intestine

✓ Billable / specific

D01.40 is a valid, billable ICD-10-CM code for carcinoma in situ of unspecified part of intestine. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About D01.40

D01.40 is the ICD-10-CM diagnosis code for carcinoma in situ of unspecified part of intestine. It belongs to category D01 (carcinoma in situ of other and unspecified digestive organs), block D00-D09 (in situ neoplasms) and chapter 2 (neoplasms). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within D01.4, choose D01.40 (unspecified part of intestine) only when documentation doesn't support a more specific option: other parts of intestine (D01.49).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 374 (Digestive Malignancy with MCC, relative weight 2.1109), DRG 375 (Digestive Malignancy with CC, relative weight 1.1838) and DRG 376 (Digestive Malignancy without CC/MCC, relative weight 0.8929), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 230.7 (carcinoma in situ of other and unspecified parts of intestine).

Notes that apply from higher levels

Instructions written at a parent level also apply to D01.40.

› From D01.4 Carcinoma in situ of other and unspecified parts of intestine
Excludes1
  • carcinoma in situ of ampulla of Vater (D01.5)
› From D01 Carcinoma in situ of other and unspecified digestive organs
Excludes1
  • melanoma in situ (D03.-)

Broader instructions also apply from D00-D09 In situ neoplasms and Chapter 2: Neoplasms.

Table of Drugs & Neoplasms entries

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 230.7Carcinoma in situ of other and unspecified parts of intestineapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about D01.40

Is D01.40 billable?

Yes. D01.40 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can D01.40 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict D01.40 as a principal diagnosis.

Is D01.40 a CC or MCC?

No. D01.40 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does D01.40 group to?

D01.40 is used in the MS-DRG v44.0 logic for MS-DRG 374 (Digestive Malignancy with MCC), MS-DRG 375 (Digestive Malignancy with CC) and MS-DRG 376 (Digestive Malignancy without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for D01.40?

The CMS General Equivalence Mappings map D01.40 to ICD-9-CM 230.7.