F51.02: Adjustment insomnia
F51.02 is the billable ICD-10-CM diagnosis code for Adjustment insomnia. 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 F51.02?
F51.02 is the ICD-10-CM diagnosis code for Adjustment insomnia. It belongs to category F51 (Sleep disorders not due to a substance or known physiological condition).
Is F51.02 a billable code?
Yes. F51.02 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 F51.02 belong to?
F51.02 is part of ICD-10-CM category F51 — Sleep disorders not due to a substance or known physiological condition, which has 30 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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