H33.321 Round hole, right eye

The ICD-10-CM code for Round hole, right eye is H33.321 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

7: Diseases of the eye and adnexa (H00-H59)

Section

H30-H36: Disorders of choroid and retina (H30-H36)

Category H33

85 codes (65 billable)

FY2026 Status

Stable since FY2024

U.S. Hospital Utilization

• An estimated 105 U.S. inpatient stays in 2022 included H33.321 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Glaucoma (TOC entry)

a. Glaucoma .............................................................................................................................. 48

Assigning glaucoma codes (use as many H40 codes as needed)

Assign as many codes from category H40, Glaucoma, as needed to identify the type of glaucoma, the affected eye, and the glaucoma stage.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference H33.321 with the canonical source and edition:

H33.321 — Round hole, right eye. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/H33.321

Canonical URL: https://icd10codingpro.com/codes/H33.321