2027 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 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.
- 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D04.0: 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
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- carcinoma in situ of vermilion border of lip (D00.01)
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 D04.0, its category, or a range that includes it.
Applicable To 1
These notes mention D04.0.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Lip Squamous Cell Carcinoma In Situ
a carcinoma that arises from the squamous epithelium of the lip and is confined to the epithelium without evidence of invasion.
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
What is the ICD-10 code for carcinoma in situ of skin of lip?
The ICD-10-CM code for carcinoma in situ of skin of lip is D04.0 (sometimes written as D040). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.
Can D04.0 be reported with D07.4?
Not as a rule. The Excludes1 note at D04, which applies to D04.0, lists "erythroplasia of Queyrat (penis) NOS (D07.4)". 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 D04.0?
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.
