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ICD-10-CM · FY 2026 APRIL UPDATE

H21.3

Cyst of iris, ciliary body and anterior chamber

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
H21.30Idiopathic cysts of iris, ciliary body or anterior chamberCategory
H21.301Idiopathic cysts of iris, ciliary body or anterior chamber, right eyeBillable
H21.302Idiopathic cysts of iris, ciliary body or anterior chamber, left eyeBillable
H21.303Idiopathic cysts of iris, ciliary body or anterior chamber, bilateralBillable
H21.309Idiopathic cysts of iris, ciliary body or anterior chamber, unspecified eyeBillable
H21.31Exudative cysts of iris or anterior chamberCategory
H21.311Exudative cysts of iris or anterior chamber, right eyeBillable
H21.312Exudative cysts of iris or anterior chamber, left eyeBillable
H21.313Exudative cysts of iris or anterior chamber, bilateralBillable
H21.319Exudative cysts of iris or anterior chamber, unspecified eyeBillable
H21.32Implantation cysts of iris, ciliary body or anterior chamberCategory
H21.321Implantation cysts of iris, ciliary body or anterior chamber, right eyeBillable
H21.322Implantation cysts of iris, ciliary body or anterior chamber, left eyeBillable
H21.323Implantation cysts of iris, ciliary body or anterior chamber, bilateralBillable
H21.329Implantation cysts of iris, ciliary body or anterior chamber, unspecified eyeBillable
H21.33Parasitic cyst of iris, ciliary body or anterior chamberCategory
H21.331Parasitic cyst of iris, ciliary body or anterior chamber, right eyeBillable
H21.332Parasitic cyst of iris, ciliary body or anterior chamber, left eyeBillable
H21.333Parasitic cyst of iris, ciliary body or anterior chamber, bilateralBillable
H21.339Parasitic cyst of iris, ciliary body or anterior chamber, unspecified eyeBillable
H21.34Primary cyst of pars planaCategory
H21.341Primary cyst of pars plana, right eyeBillable
H21.342Primary cyst of pars plana, left eyeBillable
H21.343Primary cyst of pars plana, bilateralBillable
H21.349Primary cyst of pars plana, unspecified eyeBillable
H21.35Exudative cyst of pars planaCategory
H21.351Exudative cyst of pars plana, right eyeBillable
H21.352Exudative cyst of pars plana, left eyeBillable
H21.353Exudative cyst of pars plana, bilateralBillable
H21.359Exudative cyst of pars plana, unspecified eyeBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

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ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.