ICD10BillableValid for clinical use
ICD-10 Code H40.842: Neovascular secondary angle closure glaucoma, left eye
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the eye and adnexa (H00-H59).
When is it used?
- May be used when a clinician documents neovascular secondary angle closure glaucoma, left eye in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
7Diseases of the eye and adnexa (H00-H59)
block
H40-H42Glaucoma
category
H40Glaucoma
category
H40.8Other glaucoma
category
H40.84Neovascular secondary angle closure glaucoma
currentH40.84
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
OphthalmologistCardiologist
Related codes
Sibling codes
Coverage-related procedures and services
CPT 92133high
COMPUTERIZED OPHTHALMIC DIAGNOSTIC IMAGING (EG, OPTICAL COHERENCE TOMOGRAPHY [OCT]), POSTERIOR SEGMENT, WITH INTERPRETATION AND REPORT, UNILATERAL OR BILATERAL; OPTIC NERVE
Source: CMS coverage guidance
CPT 92134high
COMPUTERIZED OPHTHALMIC DIAGNOSTIC IMAGING (EG, OPTICAL COHERENCE TOMOGRAPHY [OCT]), POSTERIOR SEGMENT, WITH INTERPRETATION AND REPORT, UNILATERAL OR BILATERAL; RETINA
Source: CMS coverage guidance
CPT 66984high
EXTRACAPSULAR CATARACT REMOVAL WITH INSERTION OF INTRAOCULAR LENS PROSTHESIS (1 STAGE PROCEDURE), MANUAL OR MECHANICAL TECHNIQUE (EG, IRRIGATION AND ASPIRATION OR PHACOEMULSIFICATION); WITHOUT ENDOSCOPIC CYCLOPHOTOCOAGULATION
Source: CMS coverage guidance
CPT 66983high
INTRACAPSULAR CATARACT EXTRACTION WITH INSERTION OF INTRAOCULAR LENS PROSTHESIS (1 STAGE PROCEDURE)
Source: CMS coverage guidance
CPT 66840high
REMOVAL OF LENS MATERIAL; ASPIRATION TECHNIQUE, 1 OR MORE STAGES
Source: CMS coverage guidance
CPT 66940high
REMOVAL OF LENS MATERIAL; EXTRACAPSULAR (OTHER THAN 66840, 66850, 66852)
Source: CMS coverage guidance
Coding guidelines
Common synonyms
Neovascular secondary angle closure glaucoma, left eye
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.