2026 ICD-10-CM Diagnosis Code D05Carcinoma in situ of breast

ICD-10-CM Codes›C00–D49›D00-D09›D05

ICD-10-CM D05
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D05 is a non-billable ICD-10-CM category code for carcinoma in situ of breast, so it cannot be submitted on claims. Use a more specific code from this category instead, such as D05.00, D05.01, D05.02, and D05.10.

Code Identity

ICD-10-CM Code
D05
Billable Status
No — Non-Billable Category
Code Describes
Carcinoma in situ of breast
Short Description
Carcinoma in situ of breast
Same as the full description in the CMS dataset.
Chapter
D00-D09
In situ neoplasms

Code Classification

ChapterC00–D49Neoplasms
SectionD00-D09In situ neoplasms
CategoryD05Carcinoma in situ of breast
This CodeD05Carcinoma in situ of breast

Specific Coding for Carcinoma in situ of breastOverview

Non-specific codes like D05 require more characters. Use one of these billable codes instead:

  • D05.0 for Lobular carcinoma in situ of breast

  • Use D05.00 for Lobular carcinoma in situ of unspecified breast

  • Use D05.01 for Lobular carcinoma in situ of right breast

  • Use D05.02 for Lobular carcinoma in situ of left breast

  • D05.1 for Intraductal carcinoma in situ of breast

  • Use D05.10 for Intraductal carcinoma in situ of unspecified breast

  • Use D05.11 for Intraductal carcinoma in situ of right breast

  • Use D05.12 for Intraductal carcinoma in situ of left breast

  • D05.8 for Other specified type of carcinoma in situ of breast

  • Use D05.80 for Other specified type of carcinoma in situ of unspecified breast

  • Use D05.81 for Other specified type of carcinoma in situ of right breast

  • Use D05.82 for Other specified type of carcinoma in situ of left breast

  • D05.9 for Unspecified type of carcinoma in situ of breast

  • Use D05.90 for Unspecified type of carcinoma in situ of unspecified breast

  • Use D05.91 for Unspecified type of carcinoma in situ of right breast

  • Use D05.92 for Unspecified type of carcinoma in situ of left breast

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • carcinoma in situ of skin of breast D04.5
  • melanoma in situ of breast skin D03.5
  • Paget's disease of breast or nipple C50

Type 2 Excludes

  • malignant neoplasm of breast C50

Patient EducationClinical

Breast Cancer

Breast cancer is a cancer that starts in breast tissue. It happens when cells in the breast change and grow out of control. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor.

The full article covers:

  • What is breast cancer?
  • What are the types of breast cancer?
  • What causes breast cancer?
  • Who is at risk for breast cancer?
  • What are the signs and symptoms of breast cancer?
  • How is breast cancer diagnosed?
  • What are the treatments for breast cancer?
  • Can breast cancer be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D05Overview

Is D05 (Carcinoma in situ of breast) a billable code?

No. This is a category header that groups the codes for carcinoma in situ of breast, and headers cannot be submitted on claims. Claims for carcinoma in situ of breast need a more specific code from this category, such as D05.00, D05.01, and D05.02.