R90.81: Abnormal echoencephalogram
R90.81 is the billable ICD-10-CM diagnosis code for Abnormal echoencephalogram. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code R90.81?
R90.81 is the ICD-10-CM diagnosis code for Abnormal echoencephalogram. It belongs to category R90 (Abnormal findings on diagnostic imaging of central nervous system).
Is R90.81 a billable code?
Yes. R90.81 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does R90.81 belong to?
R90.81 is part of ICD-10-CM category R90 — Abnormal findings on diagnostic imaging of central nervous system, which has 8 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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