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.
Complete category list
Categories beginning with H
Open a category to continue through its complete hierarchy of more specific codes.
H00Hordeolum and chalazion
H01Other inflammation of eyelid
H02Other disorders of eyelid
H04Disorders of lacrimal system
H05Disorders of orbit
H10Conjunctivitis
H11Other disorders of conjunctiva
H15Disorders of sclera
H16Keratitis
H17Corneal scars and opacities
H18Other disorders of cornea
H20Iridocyclitis
H21Other disorders of iris and ciliary body
H22Disorders of iris and ciliary body in diseases classified elsewhere
H25Age-related cataract
H26Other cataract
H27Other disorders of lens
H28Cataract in diseases classified elsewhere
H30Chorioretinal inflammation
H31Other disorders of choroid
H32Chorioretinal disorders in diseases classified elsewhere
H33Retinal detachments and breaks
H34Retinal vascular occlusions
H35Other retinal disorders
H36Retinal disorders in diseases classified elsewhere
H40Glaucoma
H42Glaucoma in diseases classified elsewhere
H43Disorders of vitreous body
H44Disorders of globe
H46Optic neuritis
H47Other disorders of optic [2nd] nerve and visual pathways
H49Paralytic strabismus
H50Other strabismus
H51Other disorders of binocular movement
H52Disorders of refraction and accommodation
H53Visual disturbances
H54Blindness and low vision
H55Nystagmus and other irregular eye movements
H57Other disorders of eye and adnexa
H59Intraoperative and postprocedural complications and disorders of eye and adnexa, not elsewhere classified
H60Otitis externa
H61Other disorders of external ear
H62Disorders of external ear in diseases classified elsewhere
H65Nonsuppurative otitis media
H66Suppurative and unspecified otitis media
H67Otitis media in diseases classified elsewhere
H68Eustachian salpingitis and obstruction
H69Other and unspecified disorders of Eustachian tube
H70Mastoiditis and related conditions
H71Cholesteatoma of middle ear
H72Perforation of tympanic membrane
H73Other disorders of tympanic membrane
H74Other disorders of middle ear mastoid
H75Other disorders of middle ear and mastoid in diseases classified elsewhere
H80Otosclerosis
H81Disorders of vestibular function
H82Vertiginous syndromes in diseases classified elsewhere
H83Other diseases of inner ear
H90Conductive and sensorineural hearing loss
H91Other and unspecified hearing loss
H92Otalgia and effusion of ear
H93Other disorders of ear, not elsewhere classified
H94Other disorders of ear in diseases classified elsewhere
H95Intraoperative and postprocedural complications and disorders of ear and mastoid process, not elsewhere classified
Transparency
Source and release
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.
Review the CDC/NCHS ICD-10-CM sourceCategory navigation
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.
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