2026 ICD-10-CM Diagnosis Code H02.521Blepharophimosis right upper eyelid

ICD-10-CM Codes›H00–H59›H00-H05›H02

ICD-10-CM H02.521
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H02.521 is a billable ICD-10-CM diagnosis code for blepharophimosis right upper eyelid. 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 Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H02.521
Billable Status
Yes — Valid for Submission
Code Describes
Blepharophimosis right upper eyelid
Short Description
Blepharophimosis right upper eyelid
Same as the full description in the CMS dataset.
Parent Code
H02.52
Blepharophimosis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH02Other disorders of eyelid
This CodeH02.521Blepharophimosis right upper eyelid

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Blepharophimosis(eyelid)
      • right
        • upper

Clinical ClassificationClinical

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

CCSR EYE008
Oculofacial plastics and orbital conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Blepharophimosis

    the abnormal narrowness of the palpebral fissure in the horizontal direction caused by the lateral displacement of the medial canthi of the eyelids. (dorland, 27th ed)

Patient EducationClinical

Eyelid Disorders

Your eyelids help protect your eyes. When you blink, your eyelids spread moisture over your eyes. Blinking also helps move dirt or other particles off the surface of the eye. You close your eyelids when you see something coming toward your eyes. This can help protect against injuries.

Read the full article at MedlinePlus

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

Convert H02.521 to ICD-9-CMHistory

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

ICD-9-CM
374.46 Blepharophimosis
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 H02.521Overview

Is H02.521 (Blepharophimosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report blepharophimosis right upper eyelid on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H02.521 group to?

When blepharophimosis right upper eyelid 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 H02.521?

Under the General Equivalence Mappings, blepharophimosis right upper eyelid converts to ICD-9-CM 374.46 (blepharophimosis). The mapping is approximate, so confirm the match fits the documentation.

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.