Billable / Specific Code
ICD-10-CM H42 is the diagnosis code for Glaucoma in diseases classified elsewhere. This code falls under the section "Glaucoma" within Chapter 7 — Diseases of the eye and adnexa (H00-H59). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as H42. They are mutually exclusive:
Understanding where H42 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, H42 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
H42 is the ICD-10-CM diagnosis code for "Glaucoma in diseases classified elsewhere". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
H42 is located in Section H40-H42 — "Glaucoma" within Chapter 7 of the ICD-10-CM Tabular List.
Use H42 when the patients documented diagnosis matches "Glaucoma in diseases classified elsewhere" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Glaucoma in diseases classified elsewhere is H42.
Yes, H42 can be used as a primary diagnosis code since it is billable and specific.
H42 is in Chapter 7 of the ICD-10-CM Tabular List.
Type 1 Excludes for H42 include: glaucoma (in) onchocerciasis (B73.02); glaucoma (in) syphilis (A52.71); glaucoma (in) tuberculous (A18.59) and more.
Yes, H42 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.