2026 ICD-10-CM Diagnosis Code H21.82Plateau iris syndrome (post-iridectomy) (postprocedural)

ICD-10-CM Codes›H00–H59›H15-H22›H21

ICD-10-CM H21.82
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H21.82 is a billable ICD-10-CM diagnosis code for plateau iris syndrome (post-iridectomy) (postprocedural). 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 bilateral plateau iris syndrome of eyes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified eye disorders.

Code Identity

ICD-10-CM Code
H21.82
Billable Status
Yes — Valid for Submission
Code Describes
Plateau iris syndrome (post-iridectomy) (postprocedural)
Short Description
Plateau iris syndrome (post-iridectomy) (postprocedural)
Same as the full description in the CMS dataset.
Parent Code
H21.8
Other specified disorders of iris and ciliary body

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH21Other disorders of iris and ciliary body
This CodeH21.82Plateau iris syndrome (post-iridectomy) (postprocedural)

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral plateau iris syndrome of eyes
  • Plateau iris configuration
  • Plateau iris syndrome
  • Plateau iris syndrome of left eye
  • Plateau iris syndrome of right eye

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.

    • Plateau iris syndrome(post-iridectomy) (postprocedural) (without glaucoma)
    • Syndrome
      • plateau iris (post-iridectomy) (postprocedural)

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 H21.82 to ICD-9-CMHistory

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

ICD-9-CM
364.82 Plateau iris syndrome
Exact Match The mapping is direct, with no qualifiers.

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 H21.82Overview

Is H21.82 (Other specified disorders of iris and ciliary body) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report plateau iris syndrome (post-iridectomy) (postprocedural) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H21.82 group to?

When plateau iris syndrome (post-iridectomy) (postprocedural) 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 H21.82?

Under the General Equivalence Mappings, plateau iris syndrome (post-iridectomy) (postprocedural) converts to ICD-9-CM 364.82 (plateau iris syndrome). The mapping is a direct match.

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.