2026 ICD-10-CM Diagnosis Code D09Carcinoma in situ of other and unspecified sites

ICD-10-CM Codes›C00–D49›D00-D09›D09

ICD-10-CM D09
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D09 is a non-billable ICD-10-CM category code for carcinoma in situ of other and unspecified sites, so it cannot be submitted on claims. Use a more specific code from this category instead, such as D09.0, D09.10, D09.19, and D09.20.

Code Identity

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

Code Classification

ChapterC00–D49Neoplasms
SectionD00-D09In situ neoplasms
CategoryD09Carcinoma in situ of other and unspecified sites
This CodeD09Carcinoma in situ of other and unspecified sites

Specific Coding for Carcinoma in situ of other and unspecified sitesOverview

Non-specific codes like D09 require more characters. Use one of these billable codes instead:

  • Use D09.0 for Carcinoma in situ of bladder

  • D09.1 for Carcinoma in situ of other and unspecified urinary organs

  • Use D09.10 for Carcinoma in situ of unspecified urinary organ

  • Use D09.19 for Carcinoma in situ of other urinary organs

  • D09.2 for Carcinoma in situ of eye

  • Use D09.20 for Carcinoma in situ of unspecified eye

  • Use D09.21 for Carcinoma in situ of right eye

  • Use D09.22 for Carcinoma in situ of left eye

  • Use D09.3 for Carcinoma in situ of thyroid and other endocrine glands

  • Use D09.8 for Carcinoma in situ of other specified sites

  • Use D09.9 for Carcinoma in situ, unspecified

Tabular List NotesGuidance

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

Type 1 Excludes

  • melanoma in situ D03

Patient EducationClinical

Cancer

Cancer is not just one disease but many diseases. Cancer begins in your cells, which are the building blocks of your body. Usually, your body forms new cells as needed, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should.

The full article covers:

  • What is cancer?
  • What are the types of cancer?
  • How does cancer develop?
  • What are the symptoms of cancer?
  • How is cancer diagnosed?
  • What are the treatments for cancer?
  • Can 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 D09Overview

Is D09 (Carcinoma in situ of other and unspecified sites) a billable code?

No. This is a category header that groups the codes for carcinoma in situ of other and unspecified sites, and headers cannot be submitted on claims. Claims for carcinoma in situ of other and unspecified sites need a more specific code from this category, such as D09.0, D09.10, and D09.19.