2026 ICD-10-CM Diagnosis Code C69.91Malignant neoplasm of unspecified site of right eye

ICD-10-CM Codes›C00–D49›C69-C72›C69

ICD-10-CM C69.91
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C69.91 is a billable ICD-10-CM diagnosis code for malignant neoplasm of unspecified site of right eye. 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 primary malignant neoplasm of right eye. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Head and neck cancers - eye.

Code Identity

ICD-10-CM Code
C69.91
Billable Status
Yes — Valid for Submission
Code Describes
Malignant neoplasm of unspecified site of right eye
Short Description
Malignant neoplasm of unspecified site of right eye
Same as the full description in the CMS dataset.
Parent Code
C69.9
Malignant neoplasm of unspecified site of eye

Code Classification

ChapterC00–D49Neoplasms
SectionC69-C72Malignant neoplasms of eye, brain and other parts of central nervous system
CategoryC69Malignant neoplasm of eye and adnexa
This CodeC69.91Malignant neoplasm of unspecified site of right eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Primary malignant neoplasm of right eye

Clinical ClassificationClinical

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

CCSR NEO001
Head and neck cancers - eye
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
eye NECC69.9C79.49D09.2D31.9D48.7D49.89
eyeballC69.9C79.49D09.2D31.9D48.7D49.89
intraocularC69.9C79.49D09.2D31.9D48.7D49.89

Patient EducationClinical

Eye Cancer

Cancer of the eye is uncommon. It can affect the outer parts of the eye, such as the eyelid, which are made up of muscles, skin and nerves. If the cancer starts inside the eyeball it's called intraocular cancer. The most common intraocular cancers in adults are melanoma and lymphoma.

Read the full article at MedlinePlus

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

Convert C69.91 to ICD-9-CMHistory

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

ICD-9-CM
190.9 Malign neopl eye NOS
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 C69.91Overview

Is C69.91 (Malignant neoplasm of unspecified site of eye) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report malignant neoplasm of unspecified site of right eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does C69.91 group to?

When malignant neoplasm of unspecified site of right eye 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 C69.91?

Under the General Equivalence Mappings, malignant neoplasm of unspecified site of right eye converts to ICD-9-CM 190.9 (malign neopl eye NOS). 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.