2026 ICD-10-CM Diagnosis Code D23.121Other benign neoplasm of skin of left upper eyelid, including canthus

ICD-10-CM Codes›C00–D49›D10-D36›D23

ICD-10-CM D23.121
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D23.121 is a billable ICD-10-CM diagnosis code for other benign neoplasm of skin of left upper 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Benign neoplasms.

Code Identity

ICD-10-CM Code
D23.121
Billable Status
Yes — Valid for Submission
Code Describes
Other benign neoplasm of skin of left upper eyelid, including canthus
Short Description
Other benign neoplasm skin/ left upper eyelid, inc canthus
Parent Code
D23.12
Other benign neoplasm of skin of left eyelid, including canthus

Code Classification

ChapterC00–D49Neoplasms
SectionD10-D36Benign neoplasms, except benign neuroendocrine tumors
CategoryD23Other benign neoplasms of skin
This CodeD23.121Other benign neoplasm of skin of left upper eyelid, including canthus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Apocrine hidrocystoma
  • Apocrine hidrocystoma of eyelid
  • Apocrine hidrocystoma of left upper eyelid
  • Benign neoplasm of skin of left upper eyelid
  • Benign neoplasm of sweat gland
  • Dermatofibroma of face
  • Dermatofibroma of skin of left upper eyelid
  • Dysplastic nevus of skin of face
  • Dysplastic nevus of skin of left upper eyelid
  • Eccrine hidrocystoma
  • Epidermal nevus of left upper eyelid
  • Melanocytic nevus of left upper eyelid
  • Melanocytic nevus of upper eyelid
  • Papilloma of eyelid
  • Papilloma of left eyelid
  • Papilloma of skin of left upper eyelid

Clinical ClassificationClinical

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

CCSR NEO073
Benign neoplasms
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Benign Tumors

Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.

Read the full article at MedlinePlus

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

Code History & ChangesHistory

Replacement D23.121 replaces the following previously assigned code(s):

  • D23.12 - Oth benign neoplasm skin/ left eyelid, including canthus
FY 2019AddedAdded to the ICD-10-CM code setEffective October 1, 2018.
FY 2020–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D23.121Overview

Is D23.121 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other benign neoplasm of skin of left upper eyelid, including canthus on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D23.121 group to?

When other benign neoplasm of skin of left upper 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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.