13325 Hargrave, Suite 290. Houston, Texas 77070. Willowbrook. Phone (281)205-0204. Fax (281)407-7623. details & map. You can submit referrals here. If you have any questions call (281)205-0204. Perinatal Medical Group is AIUM Accredited and Fetal Medicine Foundation Certified.Patients‧Home‧Referral‧About‧GDM‧Contact Us.