2026 ICD-10-CM Diagnosis Code H20.051Hypopyon, right eye

ICD-10-CM Codes›H00–H59›H15-H22›H20

ICD-10-CM H20.051
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H20.051 is a billable ICD-10-CM diagnosis code for hypopyon, right 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 hypopyon. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Uveitis and ocular inflammation.

Code Identity

ICD-10-CM Code
H20.051
Billable Status
Yes — Valid for Submission
Code Describes
Hypopyon, right eye
Short Description
Hypopyon, right eye
Same as the full description in the CMS dataset.
Parent Code
H20.05
Hypopyon

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH20Iridocyclitis
This CodeH20.051Hypopyon, right eye

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hypopyon
  • Hypopyon 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

Clinical InformationClinical

  • Hypopyon

    an accumulation of pus in the anterior chamber of the eye.

Patient EducationClinical

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Convert H20.051 to ICD-9-CMHistory

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

ICD-9-CM
364.05 Hypopyon
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 H20.051Overview

Is H20.051 (Hypopyon) a billable code?

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

What MS-DRG does H20.051 group to?

When hypopyon, right 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 H20.051?

Under the General Equivalence Mappings, hypopyon, right eye converts to ICD-9-CM 364.05 (hypopyon). 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.