2027 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 2027 (October 1, 2026 through September 30, 2027) 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D04.5: its own notes plus those printed at D04, block D00-D09, and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- Bowen's disease
- erythroplasia
- grade III intraepithelial neoplasia
- Queyrat's erythroplasia
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- 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
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Notes
General instructions on how these codes are used.
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name D04.5, its category, or a range that includes it.
Applicable To 1
These notes mention D04.5.
Excludes1 4
These codes carry an Excludes1 note naming D04.5: they are not reported together with it, unless the two conditions are unrelated.
- D01.3 Carcinoma in situ of anus and anal canalcarcinoma in situ of anal margin (D04.5)
- D01.3 Carcinoma in situ of anus and anal canalcarcinoma in situ of anal skin (D04.5)
- D01.3 Carcinoma in situ of anus and anal canalcarcinoma in situ of perianal skin (D04.5)
- D05 Carcinoma in situ of breastcarcinoma in situ of skin of breast (D04.5)
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
What is the ICD-10 code for carcinoma in situ of skin of trunk?
The ICD-10-CM code for carcinoma in situ of skin of trunk is D04.5 (sometimes written as D045). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D04.5 be reported with D01.3?
Not as a rule. The Excludes1 note on D04.5 lists "carcinoma in situ of anus NOS (D01.3)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
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.
