2026 ICD-10-CM Diagnosis Code D03.10Melanoma in situ of unspecified eyelid, including canthus

ICD-10-CM Codes›C00–D49›D00-D09›D03

ICD-10-CM D03.10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D03.10 is a billable ICD-10-CM diagnosis code for melanoma in situ of unspecified eyelid, including canthus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. Coders also document this condition as lentigo maligna of skin of eyelid. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin cancers - melanoma.

Code Identity

ICD-10-CM Code
D03.10
Billable Status
Yes — Valid for Submission
Code Describes
Melanoma in situ of unspecified eyelid, including canthus
Short Description
Melanoma in situ of unspecified eyelid, including canthus
Same as the full description in the CMS dataset.
Parent Code
D03.1
Melanoma in situ of eyelid, including canthus

Code Classification

ChapterC00–D49Neoplasms
SectionD00-D09In situ neoplasms
CategoryD03Melanoma in situ
This CodeD03.10Melanoma in situ of unspecified eyelid, including canthus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Lentigo maligna of skin of eyelid
  • Melanoma in situ of eyelid, including canthus
  • Melanoma in situ of skin of upper eyelid

Clinical ClassificationClinical

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

CCSR NEO025
Skin cancers - melanoma
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Melanoma

Melanoma is the most serious type of skin cancer. Often the first sign of melanoma is a change in the size, shape, color, or feel of a mole. Most melanomas have a black or black-blue area. Melanoma may also appear as a new mole. It may be black, abnormal, or "ugly looking."

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D03.10 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
172.1 Malig melanoma eyelid
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D03.10Overview

Is D03.10 (Melanoma in situ of eyelid, including canthus) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report melanoma in situ of unspecified eyelid, including canthus on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D03.10 group to?

When melanoma in situ of unspecified eyelid, including canthus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D03.10?

Under the General Equivalence Mappings, melanoma in situ of unspecified eyelid, including canthus converts to ICD-9-CM 172.1 (malig melanoma eyelid). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.