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ICD-10-CM 2027

ICD-10 code for Iridoschisis

H21.25

Iridoschisis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Iridoschisis”. Page updated September 29, 2026.

About coding Iridoschisis

The ICD-10-CM code for Iridoschisis is H21.25 (Iridoschisis).

Within H21.2 (degeneration of iris and ciliary body), H21.25 is specifically for Iridoschisis. Related codes cover degeneration of chamber angle (H21.21), degeneration of ciliary body (H21.22), degeneration of iris (pigmentary) (H21.23), degeneration of pupillary margin (H21.24), iris atrophy (essential) (progressive) (H21.26), Miotic pupillary cyst (H21.27) and other iris atrophy (H21.29).

To report this condition, pick the subcode that matches the documentation: H21.251 (right eye), H21.252 (left eye), H21.253 (bilateral) and H21.259 (unspecified eye).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about Iridoschisis ICD-10 codes

What is the ICD-10 code for Iridoschisis?

H21.25 — Iridoschisis (a header code; report a more specific subcode).

Is H21.25 billable?

No. H21.25 is a header code. Report one of its more specific subcodes instead.