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HomeICD-10 CodesH21
ICD-10-CM
Non-billable

H21

Classification
Category:Diseases of the eye and adnexa
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Coding Guidance
H21 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.
Excludes 2
From H00-H59
sympathetic uveitis
certain conditions originating in the perinatal period
certain infectious and parasitic diseases
complications of pregnancy, childbirth and the puerperium
congenital malformations, deformations, and chromosomal abnormalities
diabetes mellitus related eye conditions
endocrine, nutritional and metabolic diseases
injury (trauma) of eye and orbit
injury, poisoning and certain other consequences of external causes
neoplasms
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
syphilis related eye disorders
Use Additional Code
From H00-H59
Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

More Specific Codes

H21.0
Hyphema
H21.1
Other vascular disorders of iris and ciliary body
H21.2
Degeneration of iris and ciliary body
H21.3
Cyst of iris, ciliary body and anterior chamber
H21.4
Pupillary membranes
H21.5
Other and unspecified adhesions and disruptions of iris and ciliary body
H21.8
Other specified disorders of iris and ciliary body
H21.9
Unspecified disorder of iris and ciliary body

External Resources

2025 ICD-10 guidelines from CMS.gov