All ICD10 Codes
Chapter 7

H00–H59: Diseases of the Eye and Adnexa

Diseases of the Eye and Adnexa diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)
All CodesBillable Only
Internal Codes
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  • H21.313—

    Exudative cysts of iris or anterior chamber, bilateral

  • H21.319—

    Exudative cysts of iris or anterior chamber, unspecified eye

  • H21.32—

    Implantation cysts of iris, ciliary body or anterior chamber

  • H21.321—

    Implantation cysts of iris, ciliary body or anterior chamber, right eye

  • H21.322—

    Implantation cysts of iris, ciliary body or anterior chamber, left eye

  • H21.323—

    Implantation cysts of iris, ciliary body or anterior chamber, bilateral

  • H21.329—

    Implantation cysts of iris, ciliary body or anterior chamber, unspecified eye

  • H21.33—

    Parasitic cyst of iris, ciliary body or anterior chamber

  • H21.331—

    Parasitic cyst of iris, ciliary body or anterior chamber, right eye

  • H21.332—

    Parasitic cyst of iris, ciliary body or anterior chamber, left eye

  • H21.333—

    Parasitic cyst of iris, ciliary body or anterior chamber, bilateral

  • H21.339—

    Parasitic cyst of iris, ciliary body or anterior chamber, unspecified eye

  • H21.34—

    Primary cyst of pars plana

  • H21.341—

    Primary cyst of pars plana, right eye

  • H21.342—

    Primary cyst of pars plana, left eye

  • H21.343—

    Primary cyst of pars plana, bilateral

  • H21.349—

    Primary cyst of pars plana, unspecified eye

  • H21.35—

    Exudative cyst of pars plana

  • H21.351—

    Exudative cyst of pars plana, right eye

  • H21.352—

    Exudative cyst of pars plana, left eye

  • H21.353—

    Exudative cyst of pars plana, bilateral

  • H21.359—

    Exudative cyst of pars plana, unspecified eye

  • H21.4—

    Pupillary membranes

  • H21.40—

    Pupillary membranes, unspecified eye

  • H21.41—

    Pupillary membranes, right eye

  • H21.42—

    Pupillary membranes, left eye

  • H21.43—

    Pupillary membranes, bilateral

  • H21.5—

    Other and unspecified adhesions and disruptions of iris and ciliary body

  • H21.50—

    Unspecified adhesions of iris

  • H21.501—

    Unspecified adhesions of iris, right eye

  • H21.502—

    Unspecified adhesions of iris, left eye

  • H21.503—

    Unspecified adhesions of iris, bilateral

  • H21.509—

    Unspecified adhesions of iris and ciliary body, unspecified eye

  • H21.51—

    Anterior synechiae (iris)

  • H21.511—

    Anterior synechiae (iris), right eye

  • H21.512—

    Anterior synechiae (iris), left eye

  • H21.513—

    Anterior synechiae (iris), bilateral

  • H21.519—

    Anterior synechiae (iris), unspecified eye

  • H21.52—

    Goniosynechiae

  • H21.521—

    Goniosynechiae, right eye

  • H21.522—

    Goniosynechiae, left eye

  • H21.523—

    Goniosynechiae, bilateral

  • H21.529—

    Goniosynechiae, unspecified eye

  • H21.53—

    Iridodialysis

  • H21.531—

    Iridodialysis, right eye

  • H21.532—

    Iridodialysis, left eye

  • H21.533—

    Iridodialysis, bilateral

  • H21.539—

    Iridodialysis, unspecified eye

  • H21.54—

    Posterior synechiae (iris)

  • H21.541—

    Posterior synechiae (iris), right eye

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