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ICD-10-CM 2027

ICD-10 code for pupillary margin degeneration

H21.24

Degeneration of pupillary margin

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Degeneration, degenerative › pupillary margin”. Page updated September 29, 2026.

About coding pupillary margin degeneration

The ICD-10-CM code for pupillary margin degeneration is H21.24 (Degeneration of pupillary margin).

Within H21.2 (degeneration of iris and ciliary body), H21.24 is specifically for degeneration of pupillary margin. Related codes cover degeneration of chamber angle (H21.21), degeneration of ciliary body (H21.22), degeneration of iris (pigmentary) (H21.23), Iridoschisis (H21.25), 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: H21.241 (right eye), H21.242 (left eye), H21.243 (bilateral) and H21.249 (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 pupillary margin degeneration ICD-10 codes

What is the ICD-10 code for pupillary margin degeneration?

H21.24 — Degeneration of pupillary margin (a header code; report a more specific subcode).

Is H21.24 billable?

No. H21.24 is a header code. Report one of its more specific subcodes instead.