2020 ICD-10-CM Diagnosis Code H40

Glaucoma

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • H40 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM H40 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of H40 - other international versions of ICD-10 H40 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as H40. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • absolute glaucoma (
    ICD-10-CM Diagnosis Code H44.51

    Absolute glaucoma

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    H44.51-
    )
  • congenital glaucoma (
    ICD-10-CM Diagnosis Code Q15.0

    Congenital glaucoma

      2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
    Applicable To
    • Axenfeld's anomaly
    • Buphthalmos
    • Glaucoma of childhood
    • Glaucoma of newborn
    • Hydrophthalmos
    • Keratoglobus, congenital, with glaucoma
    • Macrocornea with glaucoma
    • Macrophthalmos in congenital glaucoma
    • Megalocornea with glaucoma
    Q15.0
    )
  • traumatic glaucoma due to birth injury (
    ICD-10-CM Diagnosis Code P15.3

    Birth injury to eye

      2016 2017 2018 2019 2020 Billable/Specific Code Code on Newborn Record
    Applicable To
    • Subconjunctival hemorrhage due to birth injury
    • Traumatic glaucoma due to birth injury
    P15.3
    )
The following code(s) above H40 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to H40:
  • H00-H59
    2020 ICD-10-CM Range H00-H59

    Diseases of the eye and adnexa

    Note
    • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
    Type 2 Excludes
    • 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)
    Diseases of the eye and adnexa
Clinical Information
  • A condition in which there is a build-up of fluid in the eye, which presses on the retina and the optic nerve. The retina is the layer of nerve tissue inside the eye that senses light and sends images along the optic nerve to the brain. Glaucoma can damage the optic nerve and cause loss of vision or blindness.
  • A disorder characterized by an increase in pressure in the eyeball due to obstruction of the aqueous humor outflow.
  • An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (dictionary of visual science, 4th ed)
  • Glaucoma damages the eye's optic nerve. It is a leading cause of blindness in the United States. It usually happens when the fluid pressure inside the eyes slowly rises, damaging the optic nerve. Often there are no symptoms at first, but a comprehensive eye exam can detect it. People at risk should get eye exams at least every two years. They include
    • african americans over age 40
    • people over age 60, especially mexican americans
    • people with a family history of glaucoma
    early treatment can help protect your eyes against vision loss. Treatments usually include prescription eyedrops and/or surgery. nih: national eye institute
  • Group of diseases characterized by increased intraocular pressure resulting in damage to the optic nerve and retinal nerve fibers.
  • Increased pressure in the eyeball due to obstruction of the outflow of aqueous humor.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
ICD-10-CM Codes Adjacent To H40
H35.731 …… right eye
H35.732 …… left eye
H35.733 …… bilateral
H35.739 …… unspecified eye
H35.8 Other specified retinal disorders
H35.81 Retinal edema
H35.82 Retinal ischemia
H35.89 Other specified retinal disorders
H35.9 Unspecified retinal disorder
H36 Retinal disorders in diseases classified elsewhere
H40 Glaucoma
H40.0 Glaucoma suspect
H40.00 Preglaucoma, unspecified
H40.001 …… right eye
H40.002 …… left eye
H40.003 …… bilateral
H40.009 …… unspecified eye
H40.01 Open angle with borderline findings, low risk
H40.011 …… right eye
H40.012 …… left eye
H40.013 …… bilateral

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.