Billable / Specific Code
ICD-10-CM H40.212 is the diagnosis code for Acute angle-closure glaucoma, left eye. 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.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where H40.212 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, H40.212 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
H40.212 is the ICD-10-CM diagnosis code for "Acute angle-closure glaucoma, left eye". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of H40.212 is H40.21 ("Acute angle-closure glaucoma"). H40.212 provides a more specific classification within this category.
H40.212 is located in Section H40-H42 — "Glaucoma" within Chapter 7 of the ICD-10-CM Tabular List.
Use H40.212 when the patients documented diagnosis matches "Acute angle-closure glaucoma, left eye" 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 Acute angle-closure glaucoma, left eye is H40.212.
Yes, H40.212 can be used as a primary diagnosis code since it is billable and specific.
H40.212 is in Chapter 7 of the ICD-10-CM Tabular List.
Yes, H40.212 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.