2026 ICD-10-CM Diagnosis Code H57.9Unspecified disorder of eye and adnexa

ICD-10-CM Codes›H00–H59›H55-H57›H57

ICD-10-CM H57.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H57.9 is a billable ICD-10-CM diagnosis code for unspecified disorder of eye and adnexa. 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. The code is not accepted as a principal diagnosis by the Medicare Code Editor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified eye disorders.

Code Identity

ICD-10-CM Code
H57.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified disorder of eye and adnexa
Short Description
Unspecified disorder of eye and adnexa
Same as the full description in the CMS dataset.
Parent Code
H57
Other disorders of eye and adnexa

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH55-H57Other disorders of eye and adnexa
CategoryH57Other disorders of eye and adnexa
This CodeH57.9Unspecified disorder of eye and adnexa

Code EditsBilling

Medicare Code Editor checks that affect claim validity for H57.9.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute disease of eye
  • Anomaly of eye
  • Cataract due to inflammatory disorder
  • Cataract due to ocular disease
  • Cataract of bilateral eyes due to inflammatory disorder
  • Cataract of left eye due to inflammatory disorder
  • Cataract of left eye due to ocular disease
  • Cataract of right eye due to inflammatory disorder
  • Cataract of right eye due to ocular disease
  • Chronic disease of ocular adnexa
  • Diffuse mesangial sclerosis
  • Diffuse mesangial sclerosis with ocular abnormalities
  • Disorder of anterior segment of eye
  • Disorder of bilateral eyes
  • Disorder of eye proper co-occurrent with human immunodeficiency virus infection
  • Disorder of eye region
  • Disorder of left eye region
  • Disorder of ocular adnexa
  • Disorder of posterior segment of eye
  • Disorder of right eye region
  • Eye not working properly
  • Eye symptom
  • Hereditary disorder of the visual system
  • Immunoglobulin G4 related disease
  • Immunoglobulin G4 related ophthalmic disease
  • Lesion of eye
  • Limited duction associated with other condition of eye
  • Neonatal ophthalmologic disorder
  • Ophthalmological treatment changed
  • Ophthalmological treatment started
  • Restrictive ophthalmopathy
  • Thyroid eye disease
  • Visual system complication of procedure
  • Visual system disorder

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.

    • Complication(s) (from) (of)
      • eye
    • Disease, diseased
      • eye
    • Disorder(of)
      • eye
    • Problem(with) (related to)
      • eye

Clinical ClassificationClinical

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

CCSR EYE012
Other specified eye disorders
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Eye Diseases

Even if your eyes feel healthy, you could have a problem and not know it. That's why regular eye exams are so important. Refractive errors are the most common type of vision problem that makes it hard to see clearly. But some eye conditions or diseases don't have any symptoms and can lead to a permanent loss of vision.

The full article covers:

  • What diseases can affect the eye?
  • What are the symptoms of eye diseases?
  • Who is more likely to develop eye diseases?
  • What are the treatments for eye diseases?
  • Can eye diseases be prevented?

Read the full article at MedlinePlus

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

Convert H57.9 to ICD-9-CMHistory

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

ICD-9-CM
379.40 Abn pupil function NOS
Approximate The match is approximate rather than exact.
ICD-9-CM
379.90 Eye disorder NOS
Approximate The match is approximate rather than exact.
ICD-9-CM
V41.1 Eye problems NEC
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 H57.9Overview

Is H57.9 (Other disorders of eye and adnexa) a billable code?

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

What MS-DRG does H57.9 group to?

On inpatient claims, unspecified disorder of eye and adnexa maps to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

Can H57.9 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because unspecified disorder of eye and adnexa describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

What is the ICD-9 equivalent of H57.9?

Under the General Equivalence Mappings, unspecified disorder of eye and adnexa converts to ICD-9-CM 379.40 (abn pupil function NOS), 379.90 (eye disorder NOS), and V41.1 (eye problems NEC). 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.