R40.2A: Nontraumatic coma due to underlying condition
R40.2A is the billable ICD-10-CM diagnosis code for Nontraumatic coma due to underlying condition. 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 R40.2A?
R40.2A is the ICD-10-CM diagnosis code for Nontraumatic coma due to underlying condition. It belongs to category R40 (Somnolence, stupor and coma).
Is R40.2A a billable code?
Yes. R40.2A 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 R40.2A belong to?
R40.2A is part of ICD-10-CM category R40 — Somnolence, stupor and coma, which has 202 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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