2026 ICD-10-CM Diagnosis Code H40.849
Neovascular secondary angle closure glaucoma, unspecified eye
- ICD-10-CM Code:
- H40.849
- ICD-10 Code for:
- Neovascular secondary angle closure glaucoma, unsp
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
H40.849 is a billable diagnosis code used to specify a medical diagnosis of neovascular secondary angle closure glaucoma, unspecified eye. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.
This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.
Unspecified diagnosis codes like H40.849 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
New 2026 ICD-10-CM Code
H40.849 is new to ICD-10-CM code set for the FY 2026, effective October 1, 2025. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2025. This is a new and revised code for the FY 2026 (October 1, 2025 - September 30, 2026).
Code Edits
The Medicare Code Editor (MCE) detects errors and inconsistencies in ICD-10-CM diagnosis coding that can affect Medicare claim validity. These Medicare code edits help medical coders and billing professionals determine when a diagnosis code is not appropriate as a principal diagnosis, does not meet coverage criteria. Use this list to verify whether a code is valid for Medicare billing and to avoid claim rejections or denials due to diagnosis coding issues.
Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.
Replacement Code
H40849 replaces the following previously assigned ICD-10-CM code(s):
- H40.84 - Neovascular secondary angle closure glaucoma
Code History
- FY 2026 - Code Added, effective from 10/1/2025 through 9/30/2026
