Pediatric Surgical Group. Fairfax Office, PSG (703) 560-2236. Billing Office. Main Office (703) 289-1450. Neonatology Services. Inova Children's Hospital-NICU (703) 776-6020 ... NEW Patient Portal! April 29, 2019 1:18 pm FNAPC is now using the AthenaHealth Patient Portal system!.