H ICD-10-CM Categories: Category Index
Browse 64 top-level ICD-10-CM categories beginning with H, then follow their complete FY 2027 child-code hierarchies.
Categories beginning with H
Open a category to continue through its complete hierarchy of more specific codes.
H00Hordeolum and chalazionH01Other inflammation of eyelidH02Other disorders of eyelidH04Disorders of lacrimal systemH05Disorders of orbitH10ConjunctivitisH11Other disorders of conjunctivaH15Disorders of scleraH16KeratitisH17Corneal scars and opacitiesH18Other disorders of corneaH20IridocyclitisH21Other disorders of iris and ciliary bodyH22Disorders of iris and ciliary body in diseases classified elsewhereH25Age-related cataractH26Other cataractH27Other disorders of lensH28Cataract in diseases classified elsewhereH30Chorioretinal inflammationH31Other disorders of choroidH32Chorioretinal disorders in diseases classified elsewhereH33Retinal detachments and breaksH34Retinal vascular occlusionsH35Other retinal disordersH36Retinal disorders in diseases classified elsewhereH40GlaucomaH42Glaucoma in diseases classified elsewhereH43Disorders of vitreous bodyH44Disorders of globeH46Optic neuritisH47Other disorders of optic [2nd] nerve and visual pathwaysH49Paralytic strabismusH50Other strabismusH51Other disorders of binocular movementH52Disorders of refraction and accommodationH53Visual disturbancesH54Blindness and low visionH55Nystagmus and other irregular eye movementsH57Other disorders of eye and adnexaH59Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classifiedH60Otitis externaH61Other disorders of external earH62Disorders of external ear in diseases classified elsewhereH65Nonsuppurative otitis mediaH66Suppurative and unspecified otitis mediaH67Otitis media in diseases classified elsewhereH68Eustachian salpingitis and obstructionH69Other and unspecified disorders of Eustachian tubeH70Mastoiditis and related conditionsH71Cholesteatoma of middle earH72Perforation of tympanic membraneH73Other disorders of tympanic membraneH74Other disorders of middle ear mastoidH75Other disorders of middle ear and mastoid in diseases classified elsewhereH80OtosclerosisH81Disorders of vestibular functionH82Vertiginous syndromes in diseases classified elsewhereH83Other diseases of inner earH90Conductive and sensorineural hearing lossH91Other and unspecified hearing lossH92Otalgia and effusion of earH93Other disorders of ear, not elsewhere classifiedH94Other disorders of ear in diseases classified elsewhereH95Intraoperative and postprocedural complications and disorders of ear and mastoid process, not elsewhere classifiedSource and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This category index is generated from Vero’s repository-backed ICD-10-CM hierarchy. Every listed category is a top-level record, and each linked category page exposes its direct child codes.
Frequently asked questions
Which ICD-10-CM categories begin with H?
This index lists 64 top-level categories beginning with H from Vero’s FY 2027 U.S. ICD-10-CM reference dataset.
How do I find a more specific H code?
Open a category below, then follow its linked child-code hierarchy until you reach the code supported by the documentation.
Which ICD-10-CM release does this H index use?
The index uses the FY 2027 U.S. ICD-10-CM release and the repository-backed hierarchy displayed on each linked code page.
Is every H category billable?
No. These are top-level categories used for navigation. Follow the hierarchy to a sufficiently specific code and confirm the active code set, official guidance, and payer requirements.