645Prolonged pregnancy
Complications of Pregnancy, Childbirth and the Puerperium
What this reference tells you
645 is an Ontario diagnostic code describing “Prolonged pregnancy.” It supports the diagnosis field of a claim and is distinct from the fee code identifying the service.
Before using this code
Confirm the current Ministry publication, the patient and provider context, the date of service, and documentation supporting the claim. A searchable reference does not establish eligibility or guarantee payment.