2027 ICD-10-CM Diagnosis Code D04.122Carcinoma in situ of skin of left lower eyelid, including canthus

ICD-10-CM Codes›C00–D49›D00-D09›D04

ICD-10-CM D04.122
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

D04.122 is a billable ICD-10-CM diagnosis code for carcinoma in situ of skin of left lower eyelid, including canthus. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. Coders also document this condition as carcinoma in situ of skin of left lower eyelid. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin cancers - all other types.

Code Identity

ICD-10-CM Code
D04.122
Billable Status
Yes — Valid for Submission
Code Describes
Carcinoma in situ of skin of left lower eyelid, including canthus
Short Description
Ca in situ skin of left lower eyelid, including canthus
Parent Code
D04.12
Carcinoma in situ of skin of left eyelid, including canthus

Code Classification

ChapterC00–D49Neoplasms
SectionD00-D09In situ neoplasms
CategoryD04Carcinoma in situ of skin
This CodeD04.122Carcinoma in situ of skin of left lower eyelid, including canthus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Carcinoma in situ of skin of left lower eyelid
  • Carcinoma in situ of skin of lower eyelid
  • Squamous cell carcinoma in situ of eyelid
  • Squamous cell carcinoma in situ of skin of face
  • Squamous cell carcinoma in situ of skin of left lower eyelid

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to D04.122: 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.

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.

From D04 Carcinoma in situ of skin applies to 21 codes
  • 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 D04.122, its category, or a range that includes it.

Applicable To 1

These notes mention D04.122.

  • Z86.007 Personal history of in-situ neoplasm of skin
    Conditions classifiable to D04 names D04, which includes this code

Excludes1 1

These codes carry an Excludes1 note naming D04.122: they are not reported together with it, unless the two conditions are unrelated.

  • D09.2 Carcinoma in situ of eye
    carcinoma in situ of skin of eyelid (D04.1-) names D04.1-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO028
Skin cancers - all other types
Default principal diagnosis: inpatient Yes · outpatient Yes

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 History & ChangesHistory

Replacement D04.122 replaces the following previously assigned code(s):

  • D04.12 - Carcinoma in situ of skin of left eyelid, including canthus
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About D04.122Overview

What is the ICD-10 code for carcinoma in situ of skin of left lower eyelid, including canthus?

The ICD-10-CM code for carcinoma in situ of skin of left lower eyelid, including canthus is D04.122 (sometimes written as D04122). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is D04.122 (Carcinoma in situ of skin of left eyelid, including canthus) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of skin of left lower eyelid, including canthus on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does D04.122 group to?

When carcinoma in situ of skin of left lower eyelid, including canthus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

Can D04.122 be reported with D07.4?

Not as a rule. The Excludes1 note at D04, which applies to D04.122, 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).