O30.031: Twin pregnancy, monochorionic/diamniotic, first trimester
O30.031 is the billable ICD-10-CM diagnosis code for Twin pregnancy, monochorionic/diamniotic, 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 O30.031?
O30.031 is the ICD-10-CM diagnosis code for Twin pregnancy, monochorionic/diamniotic, first trimester. It belongs to category O30 (Multiple gestation).
Is O30.031 a billable code?
Yes. O30.031 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 O30.031 belong to?
O30.031 is part of ICD-10-CM category O30 — Multiple gestation, which has 176 billable codes.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free