2027 ICD-10-CM Diagnosis Code D04Carcinoma in situ of skin

ICD-10-CM Codes›C00–D49›D00-D09›D04

ICD-10-CM D04
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D04 is a non-billable ICD-10-CM category code for carcinoma in situ of skin, so it cannot be submitted on claims. Use a more specific code from this category instead, such as D04.0, D04.10, D04.111, and D04.112.

Code Identity

ICD-10-CM Code
D04
Billable Status
No — Non-Billable Category
Code Describes
Carcinoma in situ of skin
Short Description
Carcinoma in situ of skin
Same as the full description in the CMS dataset.
Chapter
D00-D09
In situ neoplasms

Code Classification

ChapterC00–D49Neoplasms
SectionD00-D09In situ neoplasms
CategoryD04Carcinoma in situ of skin
This CodeD04Carcinoma in situ of skin

Specific Coding for Carcinoma in situ of skinOverview

Non-specific codes like D04 require more characters. Use one of these billable codes instead:

  • Use D04.0 for Carcinoma in situ of skin of lip

  • D04.1 for Carcinoma in situ of skin of eyelid, including canthus

  • Use D04.10 for Carcinoma in situ of skin of unspecified eyelid, including canthus

  • D04.11 for Carcinoma in situ of skin of right eyelid, including canthus

  • D04.12 for Carcinoma in situ of skin of left eyelid, including canthus

  • D04.2 for Carcinoma in situ of skin of ear and external auricular canal

  • Use D04.20 for Carcinoma in situ of skin of unspecified ear and external auricular canal

  • Use D04.21 for Carcinoma in situ of skin of right ear and external auricular canal

  • Use D04.22 for Carcinoma in situ of skin of left ear and external auricular canal

  • D04.3 for Carcinoma in situ of skin of other and unspecified parts of face

  • Use D04.30 for Carcinoma in situ of skin of unspecified part of face

  • Use D04.39 for Carcinoma in situ of skin of other parts of face

  • Use D04.4 for Carcinoma in situ of skin of scalp and neck

  • Use D04.5 for Carcinoma in situ of skin of trunk

  • D04.6 for Carcinoma in situ of skin of upper limb, including shoulder

  • Use D04.60 for Carcinoma in situ of skin of unspecified upper limb, including shoulder

  • Use D04.61 for Carcinoma in situ of skin of right upper limb, including shoulder

  • Use D04.62 for Carcinoma in situ of skin of left upper limb, including shoulder

  • D04.7 for Carcinoma in situ of skin of lower limb, including hip

  • Use D04.70 for Carcinoma in situ of skin of unspecified lower limb, including hip

  • Use D04.71 for Carcinoma in situ of skin of right lower limb, including hip

  • Use D04.72 for Carcinoma in situ of skin of left lower limb, including hip

  • Use D04.8 for Carcinoma in situ of skin of other sites

  • Use D04.9 for Carcinoma in situ of skin, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D04: its own notes plus those printed at 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.

From Block D00-D09 In situ neoplasms applies to 106 codes
  • 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.

  • erythroplasia of Queyrat (penis) NOS (D07.4)
  • melanoma in situ (D03.-)

Notes

General instructions on how these codes are used.

From Chapter 2 (C00-D49) Neoplasms applies to 1,730 codes
  • 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, its category, or a range that includes it.

Applicable To 1

These notes mention D04.

  • Z86.007 Personal history of in-situ neoplasm of skin
    Conditions classifiable to D04

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.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D04Overview

What is the ICD-10 code for carcinoma in situ of skin?

D04 is the ICD-10-CM category for carcinoma in situ of skin, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is D04 (Carcinoma in situ of skin) a billable code?

No. This is a category header that groups the codes for carcinoma in situ of skin, and headers cannot be submitted on claims. Claims for carcinoma in situ of skin need a more specific code from this category, such as D04.0, D04.10, and D04.111.

Can D04 be reported with D07.4?

Not as a rule. The Excludes1 note on D04 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).