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)
Internal Codes
  • H18.71

    Corneal ectasia

  • H18.711

    Corneal ectasia, right eye

  • H18.712

    Corneal ectasia, left eye

  • H18.713

    Corneal ectasia, bilateral

  • H18.719

    Corneal ectasia, unspecified eye

  • H18.72

    Corneal staphyloma

  • H18.721

    Corneal staphyloma, right eye

  • H18.722

    Corneal staphyloma, left eye

  • H18.723

    Corneal staphyloma, bilateral

  • H18.729

    Corneal staphyloma, unspecified eye

  • H18.73

    Descemetocele

  • H18.731

    Descemetocele, right eye

  • H18.732

    Descemetocele, left eye

  • H18.733

    Descemetocele, bilateral

  • H18.739

    Descemetocele, unspecified eye

  • H18.79

    Other corneal deformities

  • H18.791

    Other corneal deformities, right eye

  • H18.792

    Other corneal deformities, left eye

  • H18.793

    Other corneal deformities, bilateral

  • H18.799

    Other corneal deformities, unspecified eye

  • H18.8

    Other specified disorders of cornea

  • H18.81

    Anesthesia and hypoesthesia of cornea

  • H18.811

    Anesthesia and hypoesthesia of cornea, right eye

  • H18.812

    Anesthesia and hypoesthesia of cornea, left eye

  • H18.813

    Anesthesia and hypoesthesia of cornea, bilateral

  • H18.819

    Anesthesia and hypoesthesia of cornea, unspecified eye

  • H18.82

    Corneal disorder due to contact lens

  • H18.821

    Corneal disorder due to contact lens, right eye

  • H18.822

    Corneal disorder due to contact lens, left eye

  • H18.823

    Corneal disorder due to contact lens, bilateral

  • H18.829

    Corneal disorder due to contact lens, unspecified eye

  • H18.83

    Recurrent erosion of cornea

  • H18.831

    Recurrent erosion of cornea, right eye

  • H18.832

    Recurrent erosion of cornea, left eye

  • H18.833

    Recurrent erosion of cornea, bilateral

  • H18.839

    Recurrent erosion of cornea, unspecified eye

  • H18.89

    Other specified disorders of cornea

  • H18.891

    Other specified disorders of cornea, right eye

  • H18.892

    Other specified disorders of cornea, left eye

  • H18.893

    Other specified disorders of cornea, bilateral

  • H18.899

    Other specified disorders of cornea, unspecified eye

  • H18.9

    Unspecified disorder of cornea

  • H20

    Iridocyclitis

  • H20.0

    Acute and subacute iridocyclitis

  • H20.00

    Unspecified acute and subacute iridocyclitis

  • H20.01

    Primary iridocyclitis

  • H20.011

    Primary iridocyclitis, right eye

  • H20.012

    Primary iridocyclitis, left eye

  • H20.013

    Primary iridocyclitis, bilateral

  • H20.019

    Primary iridocyclitis, unspecified eye

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