2026 ICD-10-CM Diagnosis Code D05.11Intraductal carcinoma in situ of right breast

ICD-10-CM Codes›C00–D49›D00-D09›D05

ICD-10-CM D05.11
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D05.11 is a billable ICD-10-CM diagnosis code for intraductal carcinoma in situ of right breast. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 582 through 583, 597 through 599. Coders also document this condition as bilateral carcinoma in situ of breasts. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Breast cancer - ductal carcinoma in situ (DCIS).

Code Identity

ICD-10-CM Code
D05.11
Billable Status
Yes — Valid for Submission
Code Describes
Intraductal carcinoma in situ of right breast
Short Description
Intraductal carcinoma in situ of right breast
Same as the full description in the CMS dataset.
Parent Code
D05.1
Intraductal carcinoma in situ of breast

Code Classification

ChapterC00–D49Neoplasms
SectionD00-D09In situ neoplasms
CategoryD05Carcinoma in situ of breast
This CodeD05.11Intraductal carcinoma in situ of right breast

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral carcinoma in situ of breasts
  • Carcinoma in situ of left breast
  • Carcinoma in situ of right breast
  • Ductal carcinoma in situ of bilateral breasts
  • Ductal carcinoma in situ of breast
  • Ductal carcinoma in situ of left breast
  • Ductal carcinoma in situ of right breast

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO029
Breast cancer - ductal carcinoma in situ (DCIS)
Default principal diagnosis: inpatient Yes · outpatient Yes

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.

Convert D05.11 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
233.0 Ca in situ breast
Approximate The match is approximate rather than exact.

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 D05.11Overview

Is D05.11 (Intraductal carcinoma in situ of breast) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report intraductal carcinoma in situ of right breast on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D05.11 group to?

When intraductal carcinoma in situ of right breast is the principal diagnosis on an inpatient stay, it groups to MS-DRG 582, 583, 597, 598, 599, with relative weights from 0.7332 to 1.9266 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D05.11?

Under the General Equivalence Mappings, intraductal carcinoma in situ of right breast converts to ICD-9-CM 233.0 (ca in situ breast). 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.