H40.9

Unspecified glaucoma

Billable / specific

H40.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from H40)

  • Note: Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Excludes1

Not coded here — never report together with this code.

  • absolute glaucoma (H44.51-) (from H40)
  • congenital glaucoma (Q15.0) (from H40)
  • traumatic glaucoma due to birth injury (P15.3) (from H40)

Excludes2

Not included here — may be reported together when both conditions exist.

  • certain conditions originating in the perinatal period (P04-P96) (from H40)
  • certain infectious and parasitic diseases (A00-B99) (from H40)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A) (from H40)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from H40)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-) (from H40)
  • endocrine, nutritional and metabolic diseases (E00-E88) (from H40)
  • injury (trauma) of eye and orbit (S05.-) (from H40)
  • injury, poisoning and certain other consequences of external causes (S00-T88) (from H40)
  • neoplasms (C00-D49) (from H40)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from H40)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71) (from H40)

Also known as

  • Glaucoma

Parent code

  • H40GlaucomaHeader

Related codes

  • H40.0Glaucoma suspectHeader
  • H40.1Open-angle glaucomaHeader
  • H40.2Primary angle-closure glaucomaHeader
  • H40.3Glaucoma secondary to eye traumaNeeds 7th char
  • H40.4Glaucoma secondary to eye inflammationNeeds 7th char
  • H40.5Glaucoma secondary to other eye disordersNeeds 7th char
  • H40.6Glaucoma secondary to drugsNeeds 7th char
  • H40.8Other glaucomaHeader

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