2026 ICD-10-CM Diagnosis Code H20.023Recurrent acute iridocyclitis, bilateral

ICD-10-CM Codes›H00–H59›H15-H22›H20

ICD-10-CM H20.023
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H20.023 is a billable ICD-10-CM diagnosis code for recurrent acute iridocyclitis, bilateral. 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 Uveitis and ocular inflammation.

Code Identity

ICD-10-CM Code
H20.023
Billable Status
Yes — Valid for Submission
Code Describes
Recurrent acute iridocyclitis, bilateral
Short Description
Recurrent acute iridocyclitis, bilateral
Same as the full description in the CMS dataset.
Parent Code
H20.02
Recurrent acute iridocyclitis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH20Iridocyclitis
This CodeH20.023Recurrent acute iridocyclitis, bilateral

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral recurrent iridocyclitis
  • Bilateral recurrent iritis
  • Iridocyclitis of bilateral eyes
  • Recurrent anterior uveitis
  • Recurrent iridocyclitis
  • Recurrent iridocyclitis of left eye
  • Recurrent iridocyclitis of right eye
  • Recurrent iritis
  • Recurrent iritis of left eye
  • Recurrent iritis of right eye

Clinical ClassificationClinical

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

CCSR EYE004
Uveitis and ocular inflammation
Default principal diagnosis: inpatient Yes · 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 H20.023 to ICD-9-CMHistory

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

ICD-9-CM
364.02 Recurrent iridocyclitis
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 H20.023Overview

Is H20.023 (Recurrent acute iridocyclitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report recurrent acute iridocyclitis, bilateral on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H20.023 group to?

When recurrent acute iridocyclitis, bilateral 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 H20.023?

Under the General Equivalence Mappings, recurrent acute iridocyclitis, bilateral converts to ICD-9-CM 364.02 (recurrent iridocyclitis). 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.