H21.3
Cyst of iris, ciliary body and anterior chamber
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 13 never code together
H00-H59chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)E09.3-E10.3-E11.3-E13.3-
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury (trauma) of eye and orbit (S05.-)S05.-
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
- syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)A50.01A50.3-A51.43A52.71
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 1
H00-H59chapter
Notes
- Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 7 same parent — H21
H21.0 Hyphema category H21.1 Other vascular disorders of iris and ciliary body category H21.2 Degeneration of iris and ciliary body category H21.4 Pupillary membranes category H21.5 Oth and unsp adhes and disruptions of iris and ciliary body category H21.8 Other specified disorders of iris and ciliary body category H21.9 Unspecified disorder of iris and ciliary body
Subordinate codes 6
H21.30 Idiopathic cysts of iris, ciliary body or anterior chamber H21.31 Exudative cysts of iris or anterior chamber H21.32 Implantation cysts of iris, ciliary body or anterior chamber H21.33 Parasitic cyst of iris, ciliary body or anterior chamber H21.34 Primary cyst of pars plana H21.35 Exudative cyst of pars plana
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.