H21.549Billable
Posterior synechiae (iris), unspecified eye
- Chapter
- 7. Diseases of the eye and adnexa
- Category
- H21
- Effective date
- October 1, 2026
Related codes in category H21
H21Other disorders of iris and ciliary bodyH21.0HyphemaH21.00Hyphema, 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 eyeYes
Frequently asked questions
What is ICD-10 code H21.549?
H21.549 is an ICD-10-CM diagnosis code for Posterior synechiae (iris), unspecified eye.
Is H21.549 a billable code?
Yes. H21.549 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is H21.549 in?
H21.549 falls under Chapter 7: Diseases of the eye and adnexa.
When did H21.549 become effective?
H21.549 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to H21.549?
H21.549 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.