2026 ICD-10-CM Diagnosis Code D04.70Carcinoma in situ of skin of unspecified lower limb, including hip
ICD-10-CM Codes›C00–D49›D00-D09›D04
- Billable — Valid for Submission
- Not Chronic
D04.70 is a billable ICD-10-CM diagnosis code for carcinoma in situ of skin of unspecified lower limb, including hip. 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.
- Carcinoma in situ of skin of ankle
- Carcinoma in situ of skin of foot
- Carcinoma in situ of skin of hip
- Carcinoma in situ of skin of knee
- Carcinoma in situ of skin of lower leg
- Carcinoma in situ of skin of lower limb
- Carcinoma in situ of skin of popliteal area
- Carcinoma in situ of skin of thigh
- Carcinoma in situ of skin of toe
- Neoplasm of skin of ankle
- Neoplasm of skin of lower leg
- Neoplasm of skin of popliteal area
- Neoplasm of skin of thigh
- Neoplasm of skin of toe
- Squamous cell carcinoma in situ of skin of foot
- Squamous cell carcinoma in situ of skin of lower limb
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. |
|---|---|---|---|---|---|---|
| ankle NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| calf | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| extremity › lower | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| foot NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| heel NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| hip NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| knee NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| leg NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| limb › lower | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| nail [See Also: Neoplasm, skin, limb] › toe [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| popliteal fossa or space | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| skin NOS › ankle [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › calf [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › foot [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › heel [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › hip [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › knee [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › leg [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › limb NEC › lower | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › plantar [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › popliteal fossa or space [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › sole (foot) [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › thigh [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| skin NOS › toe [See Also: Neoplasm, skin, limb, lower] | C44.70 | C79.2 | D04.7 | D23.7 | D48.5 | D49.2 |
| thigh NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
| toe NEC | C76.5 | C79.89 | D04.7 | D36.7 | D48.7 | D49.89 |
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 D04.70 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D04.70Overview
Is D04.70 (Carcinoma in situ of skin of lower limb, including hip) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of skin of unspecified lower limb, including hip on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D04.70 group to?
When carcinoma in situ of skin of unspecified lower limb, including hip 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 D04.70?
Under the General Equivalence Mappings, carcinoma in situ of skin of unspecified lower limb, including hip converts to ICD-9-CM 232.7 (ca in situ skin leg). 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.
