ICD-10 Code H01.00A – Unspecified blepharitis right eye, upper and lower eyelids (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H01.00A – Unspecified blepharitis right eye, upper and lower eyelids
What it is
Use this code for blepharitis affecting both the upper and lower eyelids of the right eye when the type is not specified. It identifies eyelid margin inflammation without naming anterior, posterior, or other subtypes.
Clinical signs
Typical findings include eyelid margin redness, crusting, irritation, burning, or itching. Clinical features vary; refer to documentation if the note does not clearly describe laterality or eyelid involvement.
When to use this code
Assign H01.00A when the provider documents unspecified blepharitis in the right eye and states that both the upper and lower eyelids are involved. Use it when the record does not support a more specific blepharitis type.
It is appropriate for assessments, follow-up visits, or problem lists that clearly identify the right eye and both eyelids. Check documentation if the note only says “blepharitis” or does not specify eyelid location.
Do not use for
Do not use this code if the record identifies a different eye, only one eyelid, or a more specific blepharitis subtype. Check documentation when laterality or eyelid involvement is unclear.
Coding tip
Confirm both laterality and eyelid location before assigning H01.00A, because missing detail often points to a different ICD-10-CM code.