Question: How should I code subsequent hospital care of normal newborn twins whom an ob-gyn delivered at 37 weeks by cesarean section? Should I bill separately for each child or once for both? Answer: You should bill for each baby. The pediatrician has to examine and evaluate each newborn individually, so you code individually for each baby.
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You would report the pediatrician's subsequent hospital care of each newborn with 99433 (Subsequent hospital care, for the evaluation and management of a normal newborn, per day). If the infants have no problems, use ICD-9 code V31.01 (Twin, mate liveborn, born in hospital, delivered by cesarean delivery).