H05.00 Unspecified acute inflammation of orbit

The ICD-10-CM code for Unspecified acute inflammation of orbit is H05.00 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

H00-H05: Disorders of eyelid, lacrimal system and orbit (H00-H05)

Category H05

133 codes (102 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to H05.00:

• Inflammation, inflamed, inflammatory (with exudation) › orbit (chronic) › acute

U.S. Hospital Utilization

• An estimated 60 U.S. inpatient stays in 2021 included H05.00 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 H05.00 with the canonical source and edition:

H05.00 — Unspecified acute inflammation of orbit. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/H05.00

Canonical URL: https://icd10codingpro.com/codes/H05.00