Alphabetic Index FY2027

H21

Other disorders of iris and ciliary body

FY2027Chapter 7: Diseases of the eye and adnexa/H15–H22 Disorders of sclera, cornea, iris and ciliary body

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

H21 is a non-billable ICD-10-CM code category for other disorders of iris and ciliary body. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are H21.0 Hyphema; H21.1 Other vascular disorders of iris and ciliary body; H21.2 Degeneration of iris and ciliary body; H21.3 Cyst of iris, ciliary body and anterior chamber and 4 more. Its coding notes include 12 Excludes2 entries.

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
Also from chapter/block level (11 notes)
Inherited from Chapter 7 Diseases of the eye and adnexa
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 7 Diseases of the eye and adnexa
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

More specific codes under H21 8