2026 ICD-10-CM Diagnosis Code D04.0Carcinoma in situ of skin of lip
ICD-10-CM Codes›C00–D49›D00-D09›D04
- Billable — Valid for Submission
- Not Chronic
D04.0 is a billable ICD-10-CM diagnosis code for carcinoma in situ of skin of lip. 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 lip
- Squamous cell carcinoma in situ of skin of face
- Squamous cell carcinoma in situ of skin of lip
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 2 Excludes
- carcinoma in situ of vermilion border of lip D00.01
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
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 D04.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D04.0Overview
Is D04.0 (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 lip on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D04.0 group to?
When carcinoma in situ of skin of lip 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 D04.0?
Under the General Equivalence Mappings, carcinoma in situ of skin of lip converts to ICD-9-CM 232.0 (ca in situ skin lip). 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.
