Ob-Gyn Coding Alert

Reader Question:

Unsure of Weeks Gestation? Go With This ICD-10-CM Code

Question: If the ob-gyn on the delivery reports states “delivery between 39 to 40 weeks,” should I code it as Z3A.39 since that week had been completed? Or should I use unspecified weeks (Z3A.00)?

New Mexico Subscriber

Answer: You should report Z3A.39 (39 weeks gestation of pregnancy), because the patient has completed that many weeks at least but has not reached 40 weeks. You should not use Z3A.00 (Weeks of gestation not specified) because the ob-gyn has given you an idea of how many weeks gestation she was upon delivery.