Final answer:
The correct CPT code for a vaginal delivery, including routine obstetric care and postpartum care is 59400.
Step-by-step explanation:
The correct CPT code for a vaginal delivery, including routine obstetric care and postpartum care is 59400 (Routine obstetric care including antepartum care, vaginal delivery, and postpartum care). This code encompasses the entire process of vaginal delivery, including prenatal care, the delivery itself, and postpartum care. It is important to note that the CPT code 59400 is used for a routine vaginal delivery without any complications or additional procedures.