ICD-10-CM diagnosis code
H05.121 Orbital myositis, right orbit
- Billable
- Yes, a complete code (FY2026)
- Category
- H05 Disorders of orbit
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Other codes in H05
102 complete codes in this category.
- H05.049Tenonitis of unspecified orbit
- H05.10Unspecified chronic inflammatory disorders of orbit
- H05.111Granuloma of right orbit
- H05.112Granuloma of left orbit
- H05.113Granuloma of bilateral orbits
- H05.119Granuloma of unspecified orbit
- H05.121Orbital myositis, right orbit
- H05.122Orbital myositis, left orbit
- H05.123Orbital myositis, bilateral
- H05.129Orbital myositis, unspecified orbit
- H05.20Unspecified exophthalmos
- H05.211Displacement (lateral) of globe, right eye
Documentation tips
- Make sure the note supports every element of the title, “Orbital myositis, right orbit”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to H05.
The international WHO ICD-10 also has H05, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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