ICD-10 Code H21.1X9 – Other vascular disorders of iris and ciliary body, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.1X9 – Other vascular disorders of iris and ciliary body, unspecified eye
What it is
This code identifies a vascular disorder affecting the iris and ciliary body in an unspecified eye. Use it when the record describes abnormal blood vessel-related disease in these structures but does not specify laterality.
Clinical signs
Findings may include visible abnormal iris vessels, ocular inflammation, or secondary complications noted on exam. Clinical features vary; refer to documentation.
When to use this code
Use H21.1X9 when the clinician documents another vascular disorder of the iris or ciliary body and the affected eye is not stated. It also fits cases where the chart confirms the diagnosis but does not provide a more specific subtype. If laterality is documented, code to the appropriate eye-specific option instead.
Do not use for
Do not use this code for unrelated anterior segment disorders, trauma, or generalized eye vascular disease. If the condition is better described by another diagnosis, check documentation.
Coding tip
Confirm both the vascular diagnosis and laterality before assigning H21.1X9.