2026 ICD-10-CM Diagnosis Code H20.819Fuchs' heterochromic cyclitis, unspecified eye

ICD-10-CM Codes›H00–H59›H15-H22›H20

ICD-10-CM H20.819
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H20.819 is a billable ICD-10-CM diagnosis code for Fuchs' heterochromic cyclitis, unspecified eye. 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 Fuchs' heterochromic cyclitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Uveitis and ocular inflammation.

Code Identity

ICD-10-CM Code
H20.819
Billable Status
Yes — Valid for Submission
Code Describes
Fuchs' heterochromic cyclitis, unspecified eye
Short Description
Fuchs' heterochromic cyclitis, unspecified eye
Same as the full description in the CMS dataset.
Parent Code
H20.81
Fuchs' heterochromic cyclitis

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH20Iridocyclitis
This CodeH20.819Fuchs' heterochromic cyclitis, unspecified eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Fuchs' heterochromic cyclitis

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

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Read the full article at MedlinePlus

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

Convert H20.819 to ICD-9-CMHistory

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

ICD-9-CM
364.21 Fuch hetrochrom cyclitis
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 H20.819Overview

Is H20.819 (Fuchs' heterochromic cyclitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Fuchs' heterochromic cyclitis, unspecified eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H20.819 group to?

When Fuchs' heterochromic cyclitis, unspecified eye 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 H20.819?

Under the General Equivalence Mappings, Fuchs' heterochromic cyclitis, unspecified eye converts to ICD-9-CM 364.21 (fuch hetrochrom cyclitis). 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.