H21Header code — not billable
Other disorders of iris and ciliary body
- Chapter
- 7. Diseases of the eye and adnexa
- Category
- H21
- Effective date
- October 1, 2026
Related codes in category H21
H21.0HyphemaH21.00Hyphema, unspecified eyeYesH21.01Hyphema, right eyeYesH21.02Hyphema, left eyeYesH21.03Hyphema, bilateralYesH21.1Other vascular disorders of iris and ciliary bodyH21.1XOther vascular disorders of iris and ciliary bodyH21.1X1Other vascular disorders of iris and ciliary body, right eyeYesH21.1X2Other vascular disorders of iris and ciliary body, left eyeYesH21.1X3Other vascular disorders of iris and ciliary body, bilateralYesH21.1X9Other vascular disorders of iris and ciliary body, unsp eyeYesH21.2Degeneration of iris and ciliary body
Frequently asked questions
What is ICD-10 code H21?
H21 is an ICD-10-CM diagnosis code for Other disorders of iris and ciliary body.
Is H21 a billable code?
No. H21 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is H21 in?
H21 falls under Chapter 7: Diseases of the eye and adnexa.
When did H21 become effective?
H21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to H21?
H21 belongs to category H21, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.