2026 ICD-10-CM Diagnosis Code D09.8Carcinoma in situ of other specified sites

Billable — Valid for Submission
Chronic Condition

ICD-10-CM D09.8

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

D09.8 is a billable ICD-10-CM diagnosis code for carcinoma in situ of other specified sites. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 826 through 830, 843 through 845. Coders also document this condition as carcinoma in situ of ear, nose and throat. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cancer of other sites.

Code Identity

ICD-10-CM Code

D09.8

Billable Status

Yes — Valid for Submission

Code Describes

Carcinoma in situ of other specified sites

Short Description

Carcinoma in situ of other specified sites

Same as the full description in the CMS dataset.

Parent Code

D09

Carcinoma in situ of other and unspecified sites

Code Classification

ChapterC00–D49Neoplasms

SectionD00-D09In situ neoplasms

CategoryD09Carcinoma in situ of other and unspecified sites

This CodeD09.8Carcinoma in situ of other specified sites

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

Carcinoma in situ of ear, nose and throat
Carcinoma in situ of respiratory and intrathoracic organ
Primary squamous cell carcinoma of chest wall

Clinical ClassificationClinical

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

CCSR NEO069

Cancer of other sites

Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

Perineum
the body region lying between the genital area and the anus on the surface of the trunk, and to the shallow compartment lying deep to this area that is inferior to the pelvic diaphragm. the surface area is between the vulva and the anus in the female, and between the scrotum and the anus in the male.

Table of NeoplasmsClinical

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

Filter table of neoplasms:

Site	Malig. Primary	Malig. Secondary	Ca in situ	Benign	Uncertain	Unspec.
abdomen, abdominal	C76.2	C79.8	D09.8	D36.7	D48.7	D49.89
abdomen, abdominal › cavity	C76.2	C79.8	D09.8	D36.7	D48.7	D49.89
abdomen, abdominal › organ	C76.2	C79.8	D09.8	D36.7	D48.7	D49.89
abdomen, abdominal › viscera	C76.2	C79.8	D09.8	D36.7	D48.7	D49.89
axilla, axillary	C76.1	C79.89	D09.8	D36.7	D48.7	D49.89
cervical region	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
cheek	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
chest (wall) NEC	C76.1	C79.89	D09.8	D36.7	D48.7	D49.89
extrarectal	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
fossa (of) › ischiorectal	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
intra-abdominal	C76.2	C79.89	D09.8	D36.7	D48.7	D49.89
intrathoracic (cavity) (organs)	C76.1	C79.89	D09.8	D15.9	D48.7	D49.89
intrathoracic (cavity) (organs) › specified NEC	C76.1	C79.89	D09.8	D15.7	–	–
ischiorectal (fossa)	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
jaw	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
neck NEC	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
nose, nasal	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
parasagittal (region)	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
pelvis, pelvic	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
pelvis, pelvic › floor	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
pelvis, pelvic › viscera	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
pelvis, pelvic › wall	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
pelvo-abdominal	C76.8	C79.89	D09.8	D36.7	D48.7	D49.89
perineum	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
peritonsillar (tissue)	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
rectovaginal septum or wall	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
rectovesical septum	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
retro-orbital	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
retrovesical (septum)	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
sacrococcyx, sacrococcygeal › region	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
scapular region	C76.1	C79.89	D09.8	D36.7	D48.7	D49.89
septum › rectovaginal	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
septum › rectovesical	C76.3	C79.89	D09.8	D36.7	D48.7	D49.89
specified site NEC	C76.8	C79.89	D09.8	D36.7	D48.7	D49.89
submental	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
supraclavicular region	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
temporal › region	C76.0	C79.89	D09.8	D36.7	D48.7	D49.89
thorax, thoracic (cavity) (organs NEC)	C76.1	C79.89	D09.8	D36.7	D48.7	D49.89
thorax, thoracic (cavity) (organs NEC) › wall NEC	C76.1	C79.89	D09.8	D36.7	D48.7	D49.89
vesicorectal	C76.3	C79.82	D09.8	D36.7	D48.7	D49.89
viscera NEC	C76.8	C79.89	D09.8	D36.7	D48.7	D49.89

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?
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Can cancer be prevented?

Read the full article at MedlinePlus

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

Convert D09.8 to ICD-9-CMHistory

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

ICD-9-CM

234.8 Ca in situ NEC

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 D09.8Overview

Is D09.8 (Carcinoma in situ of other and unspecified sites) a billable code?

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

What MS-DRG does D09.8 group to?

When carcinoma in situ of other specified sites is the principal diagnosis on an inpatient stay, it groups to MS-DRG 826, 827, 828, 829, 830, 843, 844, 845, with relative weights from 0.8516 to 4.6778 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D09.8?

Under the General Equivalence Mappings, carcinoma in situ of other specified sites converts to ICD-9-CM 234.8 (ca in situ NEC). 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.

Indicator	Meaning	CMS pays CC/MCC DRG
Y	Diagnosis was present at the time of inpatient admission	Yes
N	Diagnosis was not present at the time of admission	No
U	Documentation is insufficient to determine	No
W	Clinically undetermined	Yes
1	Unreported, exempt from POA reporting	No