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ICD-10-CM · FY 2026 APRIL UPDATE

H21.2

Degeneration of iris and ciliary body

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
H21.21Degeneration of chamber angleCategory
H21.211Degeneration of chamber angle, right eyeBillable
H21.212Degeneration of chamber angle, left eyeBillable
H21.213Degeneration of chamber angle, bilateralBillable
H21.219Degeneration of chamber angle, unspecified eyeBillable
H21.22Degeneration of ciliary bodyCategory
H21.221Degeneration of ciliary body, right eyeBillable
H21.222Degeneration of ciliary body, left eyeBillable
H21.223Degeneration of ciliary body, bilateralBillable
H21.229Degeneration of ciliary body, unspecified eyeBillable
H21.23Degeneration of iris (pigmentary)Category
H21.231Degeneration of iris (pigmentary), right eyeBillable
H21.232Degeneration of iris (pigmentary), left eyeBillable
H21.233Degeneration of iris (pigmentary), bilateralBillable
H21.239Degeneration of iris (pigmentary), unspecified eyeBillable
H21.24Degeneration of pupillary marginCategory
H21.241Degeneration of pupillary margin, right eyeBillable
H21.242Degeneration of pupillary margin, left eyeBillable
H21.243Degeneration of pupillary margin, bilateralBillable
H21.249Degeneration of pupillary margin, unspecified eyeBillable
H21.25IridoschisisCategory
H21.251Iridoschisis, right eyeBillable
H21.252Iridoschisis, left eyeBillable
H21.253Iridoschisis, bilateralBillable
H21.259Iridoschisis, unspecified eyeBillable
H21.26Iris atrophy (essential) (progressive)Category
H21.261Iris atrophy (essential) (progressive), right eyeBillable
H21.262Iris atrophy (essential) (progressive), left eyeBillable
H21.263Iris atrophy (essential) (progressive), bilateralBillable
H21.269Iris atrophy (essential) (progressive), 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.

Open official CMS files

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