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ICD-10-CM 2027 diagnosis code

D12.3Benign neoplasm of transverse colon

✓ Billable / specific

D12.3 is a valid, billable ICD-10-CM code for benign neoplasm of transverse colon. 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 D12.3

D12.3 is the ICD-10-CM diagnosis code for benign neoplasm of transverse colon. It belongs to category D12 (benign neoplasm of colon, rectum, anus and anal canal), block D10-D36 (benign neoplasms, except benign neuroendocrine tumors) 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 D12 (benign neoplasm of colon, rectum, anus and anal canal), D12.3 is specifically for benign neoplasm of transverse colon. Related codes cover cecum (D12.0), appendix (D12.1), ascending colon (D12.2), descending colon (D12.4), sigmoid colon (D12.5), colon, unspecified (D12.6), rectosigmoid junction (D12.7), rectum (D12.8) and 1 more.

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 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), 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 211.3 (benign neoplasm of colon).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Benign neoplasm of hepatic flexure
  • Benign neoplasm of splenic flexure

Notes that apply from higher levels

Instructions written at a parent level also apply to D12.3.

› From D12 Benign neoplasm of colon, rectum, anus and anal canal
Excludes2
  • benign carcinoid tumors of the large intestine and rectum (D3A.02-)
  • polyp of colon NOS (K63.5)

Broader instructions also apply from Chapter 2: Neoplasms.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to D12.3.

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 →
  • 211.3Benign neoplasm of colonapproximate

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 D12.3

Is D12.3 billable?

Yes. D12.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can D12.3 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict D12.3 as a principal diagnosis.

Is D12.3 a CC or MCC?

No. D12.3 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does D12.3 group to?

D12.3 is used in the MS-DRG v44.0 logic for MS-DRG 393 (Other Digestive System Diagnoses with MCC), MS-DRG 394 (Other Digestive System Diagnoses with CC) and MS-DRG 395 (Other Digestive System Diagnoses 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 D12.3?

The CMS General Equivalence Mappings map D12.3 to ICD-9-CM 211.3.