ICD-10 Code H51.1 – Convergence insufficiency and excess (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H51.1 – Convergence insufficiency and excess
What it is
H51.1 identifies a binocular vision disorder in which the eyes do not align normally during near viewing. It includes both convergence insufficiency and convergence excess, so use the code when documentation names either condition.
Clinical signs
Common findings include eye strain, blurred or double vision at near, and difficulty sustaining reading or close work. Clinical features vary; refer to documentation.
When to use this code
Use H51.1 when the provider documents convergence insufficiency, convergence excess, or both as the diagnosis. It is appropriate for outpatient, specialty eye care, or problem-list documentation when the condition is being evaluated or followed. Check documentation if the note only describes nonspecific visual complaints.
Do not use for
Do not use this code for general refractive error, unspecified diplopia, or other ocular motor disorders without documented convergence abnormality. Check documentation when the record mentions strabismus or another alignment problem.
Coding tip
Code the specific convergence disorder named by the provider; if the record is vague, query for clarification.