O66.4
Non-billableFailed trial of labor
O66.4 is the ICD-10-CM code for Failed trial of labor. It is a non-billable category code — use a more specific child code such as O66.40 for billing.
O00-O9A Pregnancy, childbirth and the puerperium
What this means — in plain language
MedlinePlus · NIHChildbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include: Preterm (premature) labor , when your labor starts before 37 completed weeks of pregnancy Premature rupture of membranes (PROM), when your water breaks too early. If labor…
Read more about Childbirth Problems at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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