2026 ICD-10-CM Diagnosis Code D06.9Carcinoma in situ of cervix, unspecified

ICD-10-CM Codes›C00–D49›D00-D09›D06

ICD-10-CM D06.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D06.9 is a billable ICD-10-CM diagnosis code for carcinoma in situ of cervix, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 736 through 741, 754 through 756. Coders also document this condition as adenocarcinoma in situ of cervix. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Female reproductive system cancers - cervix.

Code Identity

ICD-10-CM Code
D06.9
Billable Status
Yes — Valid for Submission
Code Describes
Carcinoma in situ of cervix, unspecified
Short Description
Carcinoma in situ of cervix, unspecified
Same as the full description in the CMS dataset.
Parent Code
D06
Carcinoma in situ of cervix uteri

Code Classification

ChapterC00–D49Neoplasms
SectionD00-D09In situ neoplasms
CategoryD06Carcinoma in situ of cervix uteri
This CodeD06.9Carcinoma in situ of cervix, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adenocarcinoma in situ of cervix
  • Carcinoma in situ of uterine cervix
  • Carcinoma in situ of uterus
  • Cervical intraepithelial neoplasia
  • Dysplasia of cervix
  • High grade cervical glandular intraepithelial neoplasia
  • Squamous cell carcinoma in situ of uterine cervix

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Adenocarcinoma
      • cervix, in situ
    • Carcinoma(malignant)
      • cervix uteri
        • in situ
    • Carcinoma-in-situ
      • epidermoid
        • with questionable stromal invasion
          • cervix
    • Carcinoma-in-situ
      • epidermoid
        • with questionable stromal invasion
          • unspecified site
    • Carcinoma-in-situ
      • squamous cell
        • with questionable stromal invasion
          • cervix
    • Carcinoma-in-situ
      • squamous cell
        • with questionable stromal invasion
          • unspecified site
    • Dysplasia
      • cervix (uteri)
        • severe
    • Neoplasia
      • intraepithelial (histologically confirmed)
        • cervical glandular (histologically confirmed)
    • Neoplasia
      • intraepithelial (histologically confirmed)
        • cervix (uteri) (CIN) (histologically confirmed)
          • glandular
    • Neoplasia
      • intraepithelial (histologically confirmed)
        • cervix (uteri) (CIN) (histologically confirmed)
          • grade III (severe dysplasia)

Clinical ClassificationClinical

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

CCSR NEO032
Female reproductive system cancers - cervix
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • High Grade Cervical Glandular Intraepithelial Neoplasia

    cervical glandular intraepithelial neoplasia characterized by the presence of severe dysplastic changes.

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
cervix (cervical) (uteri) (uterus)C53.9C79.82D06.9D26.0D39.0D49.59
uterus, uteri, uterine › cervixC53.9C79.82D06.9D26.0D39.0D49.59

Patient EducationClinical

Cervical Cancer

Cervical cancer is cancer that starts in the cells of the cervix. The cervix is part of the female reproductive system. It is the lower, narrow end of the uterus (womb), which opens into the vagina (birth canal).

The full article covers:

  • What is cervical cancer?
  • What causes cervical cancer?
  • Who is more likely to develop cervical cancer?
  • What are the symptoms of cervical cancer?
  • How is cervical cancer diagnosed?
  • What are the treatments for cervical cancer?
  • Can cervical cancer be prevented?
  • What is Cervical Cancer?

Read the full article at MedlinePlus

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

Convert D06.9 to ICD-9-CMHistory

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

ICD-9-CM
233.1 Ca in situ cervix uteri
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 D06.9Overview

Is D06.9 (Carcinoma in situ of cervix uteri) a billable code?

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

What MS-DRG does D06.9 group to?

When carcinoma in situ of cervix, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 736, 737, 738, 739, 740, 741, 754, 755, 756, with relative weights from 0.9605 to 3.5745 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D06.9?

Under the General Equivalence Mappings, carcinoma in situ of cervix, unspecified converts to ICD-9-CM 233.1 (ca in situ cervix uteri). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.