2026 ICD-10-CM Diagnosis Code H57.00Unspecified anomaly of pupillary function

ICD-10-CM Codes›H00–H59›H55-H57›H57

ICD-10-CM H57.00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H57.00 is a billable ICD-10-CM diagnosis code for unspecified anomaly of pupillary function. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as abnormal function of pupil of bilateral eyes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified eye disorders.

Code Identity

ICD-10-CM Code
H57.00
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified anomaly of pupillary function
Short Description
Unspecified anomaly of pupillary function
Same as the full description in the CMS dataset.
Parent Code
H57.0
Anomalies of pupillary function

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH55-H57Other disorders of eye and adnexa
CategoryH57Other disorders of eye and adnexa
This CodeH57.00Unspecified anomaly of pupillary function

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal function of pupil of bilateral eyes
  • Abnormal function of pupil of left eye
  • Abnormal function of pupil of right eye
  • Abnormal pupil
  • Abnormal pupil reaction
  • Abnormal pupillary function
  • Impaired pupillary reflex

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.

    • Anomaly, anomalous(congenital) (unspecified type)
      • pupil
        • function

Clinical ClassificationClinical

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

CCSR EYE012
Other specified eye disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Eye Diseases

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Read the full article at MedlinePlus

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

Convert H57.00 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.

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 H57.00Overview

Is H57.00 (Anomalies of pupillary function) a billable code?

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

What is the ICD-9 equivalent of H57.00?

Under the General Equivalence Mappings, unspecified anomaly of pupillary function converts to ICD-9-CM 379.40 (abn pupil function NOS). 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.