2026 ICD-10-CM Diagnosis Code D04.5Carcinoma in situ of skin of trunk
ICD-10-CM Codes›C00–D49›D00-D09›D04
- Billable — Valid for Submission
- Not Chronic
D04.5 is a billable ICD-10-CM diagnosis code for carcinoma in situ of skin of trunk. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin cancers - all other types.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Anal intraepithelial neoplasia
- Carcinoma in situ of anal margin
- Carcinoma in situ of anus
- Carcinoma in situ of perianal skin
- Carcinoma in situ of skin of abdomen
- Carcinoma in situ of skin of axilla
- Carcinoma in situ of skin of back
- Carcinoma in situ of skin of breast
- Carcinoma in situ of skin of buttock
- Carcinoma in situ of skin of chest
- Carcinoma in situ of skin of groin
- Carcinoma in situ of skin of perineum
- Carcinoma in situ of skin of trunk
- Carcinoma in situ of skin of umbilicus
- Intraepithelial squamous cell carcinoma of anogenital region
- Neoplasm of skin of axilla
- Neoplasm of skin of buttock
- Neoplasm of skin of groin
- Neoplasm of skin of umbilicus
- Squamous cell carcinoma in situ of skin of anus
- Squamous cell carcinoma in situ of skin of buttock
- Squamous cell carcinoma in situ of skin of chest
- Squamous cell carcinoma in situ of skin of lower limb
- Squamous cell carcinoma in situ of skin of perianal area
- Squamous cell carcinoma in situ of skin of trunk
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Carcinoma in situ of anal margin
- Carcinoma in situ of anal skin
- Carcinoma in situ of perianal skin
- Carcinoma in situ of skin of breast
Type 1 Excludes
- carcinoma in situ of anus NOS D01.3
- carcinoma in situ of scrotum D07.61
- carcinoma in situ of skin of genital organs D07
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| abdomen, abdominal › wall [See Also: Neoplasm, abdomen, wall, skin] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| anus, anal › margin [See Also: Neoplasm, anus, skin] | C44.500 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| anus, anal › skin | C44.500 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| axilla, axillary › fold [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| back NEC | C76.8 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| breast (connective tissue) (glandular tissue) (soft parts) › skin | C44.501 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| buttock NEC | C76.3 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| flank NEC | C76.8 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| gluteal region | C76.3 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| groin NEC | C76.3 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| infraclavicular (region) | C76.1 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| inguinal (region) | C76.3 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| nates [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| perianal (skin) [See Also: Neoplasm, anus, skin] | C44.500 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › abdominal wall | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › anus | C44.500 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › axilla, axillary fold [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › back [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › breast | C44.501 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › buttock [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › chest (wall) [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › clavicular area [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › flank [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › gluteal region [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › groin [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › infraclavicular region [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › inguinal region [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › nates [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › perianal [See Also: Neoplasm, skin, anus] | C44.500 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › perineum [See Also: Neoplasm, skin, anus] | C44.500 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › pubes [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › sacrococcygeal region [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › scapular region [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › submammary fold [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › thoracic wall [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › trunk | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| skin NOS › umbilicus [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
| trunk NEC | C76.8 | C79.89 | D04.5 | D36.7 | D48.7 | D49.89 |
| umbilicus, umbilical [See Also: Neoplasm, skin, trunk] | C44.509 | C79.2 | D04.5 | D23.5 | D48.5 | D49.2 |
Patient EducationClinical
Skin Cancer
Skin cancer is the most common form of cancer in the United States. The two most common types are basal cell cancer and squamous cell cancer. They usually form on the head, face, neck, hands, and arms. Another type of skin cancer, melanoma, is more dangerous but less common.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D04.5 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D04.5Overview
Is D04.5 (Carcinoma in situ of skin) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of skin of trunk on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D04.5 group to?
When carcinoma in situ of skin of trunk is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D04.5?
Under the General Equivalence Mappings, carcinoma in situ of skin of trunk converts to ICD-9-CM 232.5 (ca in situ skin trunk). 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.
