O26.01: Excessive weight gain in pregnancy, first trimester
O26.01 is the billable ICD-10-CM diagnosis code for Excessive weight gain in pregnancy, first trimester. 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 O26.01?
O26.01 is the ICD-10-CM diagnosis code for Excessive weight gain in pregnancy, first trimester. It belongs to category O26 (Maternal care for other conditions predominantly related to pregnancy).
Is O26.01 a billable code?
Yes. O26.01 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 O26.01 belong to?
O26.01 is part of ICD-10-CM category O26 — Maternal care for other conditions predominantly related to pregnancy, which has 144 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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