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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  • H16.252—

    Phlyctenular keratoconjunctivitis, left eye

  • H16.253—

    Phlyctenular keratoconjunctivitis, bilateral

  • H16.259—

    Phlyctenular keratoconjunctivitis, unspecified eye

  • H16.26—

    Vernal keratoconjunctivitis, with limbar and corneal involvement

  • H16.261—

    Vernal keratoconjunctivitis, with limbar and corneal involvement, right eye

  • H16.262—

    Vernal keratoconjunctivitis, with limbar and corneal involvement, left eye

  • H16.263—

    Vernal keratoconjunctivitis, with limbar and corneal involvement, bilateral

  • H16.269—

    Vernal keratoconjunctivitis, with limbar and corneal involvement, unspecified eye

  • H16.29—

    Other keratoconjunctivitis

  • H16.291—

    Other keratoconjunctivitis, right eye

  • H16.292—

    Other keratoconjunctivitis, left eye

  • H16.293—

    Other keratoconjunctivitis, bilateral

  • H16.299—

    Other keratoconjunctivitis, unspecified eye

  • H16.3—

    Interstitial and deep keratitis

  • H16.30—

    Unspecified interstitial keratitis

  • H16.301—

    Unspecified interstitial keratitis, right eye

  • H16.302—

    Unspecified interstitial keratitis, left eye

  • H16.303—

    Unspecified interstitial keratitis, bilateral

  • H16.309—

    Unspecified interstitial keratitis, unspecified eye

  • H16.31—

    Corneal abscess

  • H16.311—

    Corneal abscess, right eye

  • H16.312—

    Corneal abscess, left eye

  • H16.313—

    Corneal abscess, bilateral

  • H16.319—

    Corneal abscess, unspecified eye

  • H16.32—

    Diffuse interstitial keratitis

  • H16.321—

    Diffuse interstitial keratitis, right eye

  • H16.322—

    Diffuse interstitial keratitis, left eye

  • H16.323—

    Diffuse interstitial keratitis, bilateral

  • H16.329—

    Diffuse interstitial keratitis, unspecified eye

  • H16.33—

    Sclerosing keratitis

  • H16.331—

    Sclerosing keratitis, right eye

  • H16.332—

    Sclerosing keratitis, left eye

  • H16.333—

    Sclerosing keratitis, bilateral

  • H16.339—

    Sclerosing keratitis, unspecified eye

  • H16.39—

    Other interstitial and deep keratitis

  • H16.391—

    Other interstitial and deep keratitis, right eye

  • H16.392—

    Other interstitial and deep keratitis, left eye

  • H16.393—

    Other interstitial and deep keratitis, bilateral

  • H16.399—

    Other interstitial and deep keratitis, unspecified eye

  • H16.4—

    Corneal neovascularization

  • H16.40—

    Unspecified corneal neovascularization

  • H16.401—

    Unspecified corneal neovascularization, right eye

  • H16.402—

    Unspecified corneal neovascularization, left eye

  • H16.403—

    Unspecified corneal neovascularization, bilateral

  • H16.409—

    Unspecified corneal neovascularization, unspecified eye

  • H16.41—

    Ghost vessels (corneal)

  • H16.411—

    Ghost vessels (corneal), right eye

  • H16.412—

    Ghost vessels (corneal), left eye

  • H16.413—

    Ghost vessels (corneal), bilateral

  • H16.419—

    Ghost vessels (corneal), unspecified eye

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