2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D05: its own notes plus those printed at block D00-D09 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block D00-D09 In situ neoplasms applies to 106 codes
  • Bowen's disease
  • erythroplasia
  • grade III intraepithelial neoplasia
  • Queyrat's erythroplasia

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • carcinoma in situ of skin of breast (D04.5)
  • malignant neoplasm of breast (C50.-)
  • melanoma in situ of breast (skin) (D03.5)
  • Paget's disease of breast or nipple (C50.-)

Notes

General instructions on how these codes are used.

From Chapter 2 (C00-D49) Neoplasms applies to 1,730 codes
  • 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 D05, its category, or a range that includes it.

Applicable To 1

These notes mention D05.

  • Z86.000 Personal history of in-situ neoplasm of breast
    Conditions classifiable to D05

Clinical InformationClinical

  • Breast Carcinoma In Situ

    an intraepithelial carcinoma that arises from the breast without evidence of invasion. it includes ductal carcinoma in situ and lobular carcinoma in situ.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D05Overview

What is the ICD-10 code for carcinoma in situ of breast?

D05 is the ICD-10-CM category for carcinoma in situ of breast, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can D05 be reported with D04.5?

Not as a rule. The Excludes1 note on D05 lists "carcinoma in situ of skin of breast (D04.5)". 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).