ICD-10 Code H53.003 – Unspecified amblyopia, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H53.003 – Unspecified amblyopia, bilateral
What it is
H53.003 identifies amblyopia affecting both eyes when the type is not further specified. It is used when reduced visual acuity is present and the record does not document a more exact amblyopia subtype.
Clinical signs
Clinical features vary; refer to documentation. Amblyopia is typically associated with decreased visual acuity not fully explained by structural eye disease, and bilateral involvement means both eyes are affected.
When to use this code
Use this code when the provider documents bilateral amblyopia but does not specify deprivation, strabismic, anisometropic, or another subtype. It also fits cases where the chart simply states “unspecified amblyopia, bilateral.”
Assign it only from provider documentation or a clearly supported diagnosis statement. If the record identifies a more specific amblyopia type, use that code instead.
Do not use for
Do not use H53.003 for unilateral amblyopia or for a documented specific amblyopia subtype. Do not use it when reduced vision is better explained by another eye disorder; check documentation.
Coding tip
Confirm that both laterality and “unspecified” are documented before assigning H53.003.