ICD-10-CM Codes
H00-H59
H40-H42
H42-
2023 ICD-10-CM Diagnosis Code H42

2023 ICD-10-CM Diagnosis Code H42

Glaucoma in diseases classified elsewhere

2016

2017

2018

2019

2020

2021

2022

2023

Billable/Specific Code

Manifestation Code

H42 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM H42 became effective on October 1, 2022.
This is the American ICD-10-CM version of H42 - other international versions of ICD-10 H42 may differ.

ICD-10-CM Coding Rules

H42 describes the manifestation of an underlying disease, not the disease itself.

Code First

Code First Help

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.

underlying condition, such as:
amyloidosis (
ICD-10-CM Diagnosis Code E85
- E85 Amyloidosis
  - E85.0 Non-neuropathic heredofamilial amyloidosis
  - E85.1 Neuropathic heredofamilial amyloidosis
  - E85.2 Heredofamilial amyloidosis, unspecified
  - E85.3 Secondary systemic amyloidosis
  - E85.4 Organ-limited amyloidosis
  - E85.8 Other amyloidosis
    - E85.81 Light chain (AL) amyloidosis
    - E85.82 Wild-type transthyretin-related (ATTR) amyloi...
    - E85.89 Other amyloidosis
  - E85.9 Amyloidosis, unspecified
E85.-
)
aniridia (
ICD-10-CM Diagnosis Code Q13.1
Absence of iris
Applicable To
- Aniridia
Use Additional
- code for associated glaucoma (H42)
Q13.1
)
glaucoma (in) diabetes mellitus (
ICD-10-CM Diagnosis Code E08.39
Diabetes mellitus due to underlying condition with other diabetic ophthalmic complication
Use Additional
- code to identify manifestation, such as:
- diabetic glaucoma (H40-H42)
E08.39
,
ICD-10-CM Diagnosis Code E09.39
Drug or chemical induced diabetes mellitus with other diabetic ophthalmic complication
Use Additional
- code to identify manifestation, such as:
- diabetic glaucoma (H40-H42)
E09.39
,
ICD-10-CM Diagnosis Code E10.39
Type 1 diabetes mellitus with other diabetic ophthalmic complication
Use Additional
- code to identify manifestation, such as:
- diabetic glaucoma (H40-H42)
E10.39
,
ICD-10-CM Diagnosis Code E11.39
Type 2 diabetes mellitus with other diabetic ophthalmic complication
Use Additional
- code to identify manifestation, such as:
- diabetic glaucoma (H40-H42)
E11.39
,
ICD-10-CM Diagnosis Code E13.39
Other specified diabetes mellitus with other diabetic ophthalmic complication
Use Additional
- code to identify manifestation, such as:
- diabetic glaucoma (H40-H42)
E13.39
)
Lowe's syndrome (
ICD-10-CM Diagnosis Code E72.03
Lowe's syndrome
Use Additional
- code for associated glaucoma (H42)
E72.03
)
Reiger's anomaly (
ICD-10-CM Diagnosis Code Q13.81
Rieger's anomaly
Use Additional
- code for associated glaucoma (H42)
Q13.81
)
specified metabolic disorder (E70-E88
ICD-10-CM Range E70-E88
Metabolic disorders
Type 1 Excludes
- androgen insensitivity syndrome (E34.5-)
- congenital adrenal hyperplasia (E25.0)
- hemolytic anemias attributable to enzyme disorders (D55.-)
- Marfan's syndrome (Q87.4)
- 5-alpha-reductase deficiency (E29.1)
Type 2 Excludes
- Ehlers-Danlos syndromes (Q79.6-)
- E70 Disorders of aromatic amino-acid metabol...
- E71 Disorders of branched-chain amino-acid m...
- E72 Other disorders of amino-acid metabolism
- E73 Lactose intolerance
- E74 Other disorders of carbohydrate metaboli...
- E75 Disorders of sphingolipid metabolism and...
- E76 Disorders of glycosaminoglycan metabolis...
- E77 Disorders of glycoprotein metabolism
- E78 Disorders of lipoprotein metabolism and ...
- E79 Disorders of purine and pyrimidine metab...
- E80 Disorders of porphyrin and bilirubin met...
- E83 Disorders of mineral metabolism
- E84 Cystic fibrosis
- E85 Amyloidosis
- E86 Volume depletion
- E87 Other disorders of fluid, electrolyte an...
- E88 Other and unspecified metabolic disorder...
)

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 H42. 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.

glaucoma (in) onchocerciasis (
ICD-10-CM Diagnosis Code B73.02
Onchocerciasis with glaucoma
B73.02
)
glaucoma (in) syphilis (
ICD-10-CM Diagnosis Code A52.71
Late syphilitic oculopathy
Applicable To
- Late syphilitic chorioretinitis
- Late syphilitic episcleritis
A52.71
)
glaucoma (in) tuberculous (
ICD-10-CM Diagnosis Code A18.59
Other tuberculosis of eye
Applicable To
- Tuberculous conjunctivitis
A18.59
)

The following code(s) above H42 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 H42:

H00-H59
2023 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

Approximate Synonyms

Bilateral glaucoma due to systemic disorder
Diabetes mellitus type 1 w complications
Glaucoma assoc with systemic syndrome
Glaucoma associated with systemic syndromes
Glaucoma due to type 1 diabetes mellitus
Left glaucoma due to systemic disorder
Right glaucoma due to systemic disorder

ICD-10-CM H42 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

124 Other disorders of the eye with mcc
125 Other disorders of the eye without mcc

Convert H42 to ICD-9-CM

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
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Code annotations containing back-references to H42:

Use Additional: Q13.1
, Q13.81
, E72.03

ICD-10-CM Diagnosis Code Q13.1
Absence of iris
Applicable To
- Aniridia
Use Additional
- code for associated glaucoma (H42)
ICD-10-CM Diagnosis Code Q13.81
Rieger's anomaly
Use Additional
- code for associated glaucoma (H42)
ICD-10-CM Diagnosis Code E72.03
Lowe's syndrome
Use Additional
- code for associated glaucoma (H42)

ICD-10-CM Codes Adjacent To H42

H40.822 …… left eye

H40.823 …… bilateral

H40.829 …… unspecified eye

H40.83 Aqueous misdirection

H40.831 …… right eye

H40.832 …… left eye

H40.833 …… bilateral

H40.839 …… unspecified eye

H40.89 Other specified glaucoma

H40.9 Unspecified glaucoma

H42 Glaucoma in diseases classified elsewhere

H43 Disorders of vitreous body

H43.0 Vitreous prolapse

H43.00 …… unspecified eye

H43.01 …… right eye

H43.02 …… left eye

H43.03 …… bilateral

H43.1 Vitreous hemorrhage

H43.10 …… unspecified eye

H43.11 …… right eye

H43.12 …… left eye

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

2023 ICD-10-CM Diagnosis Code H42

Glaucoma in diseases classified elsewhere

Absence of iris

Diabetes mellitus due to underlying condition with other diabetic ophthalmic complication

Drug or chemical induced diabetes mellitus with other diabetic ophthalmic complication

Type 1 diabetes mellitus with other diabetic ophthalmic complication

Type 2 diabetes mellitus with other diabetic ophthalmic complication

Other specified diabetes mellitus with other diabetic ophthalmic complication

Lowe's syndrome

Rieger's anomaly

Metabolic disorders

Onchocerciasis with glaucoma

Late syphilitic oculopathy

Other tuberculosis of eye

Diseases of the eye and adnexa

Absence of iris

Rieger's anomaly

Lowe's syndrome