O36.8399: Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, other fetus
O36.8399 is the billable ICD-10-CM diagnosis code for Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, other fetus. 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 O36.8399?
O36.8399 is the ICD-10-CM diagnosis code for Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, other fetus. It belongs to category O36 (Maternal care for other fetal problems).
Is O36.8399 a billable code?
Yes. O36.8399 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 O36.8399 belong to?
O36.8399 is part of ICD-10-CM category O36 — Maternal care for other fetal problems, which has 798 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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