Question: Our provider billed O34.21 and Z 37.0 in connection with a repeat Cesarean section. Please confirm if this is correct, as the billing department says that we should use O34.21 and Z3A- instead.
Arizona Subscriber
Answer: Begin with diagnosis O34.21 (Maternal care related to the fetus and amniotic cavity and possible delivery problems). When choosing between Z37.0 (Live birth single, only applicable to maternity patients aged 12-55 years inclusive) and category Z3A- (Weeks of gestation), it would be appropriate to pick the appropriate gestational time code from Z3A-. The codes from category Z3A- normally are used only on the maternal record, to indicate the weeks of gestation of the pregnancy. Check with your payer to verify before submitting your claim.