David W. Simonak, DO earned a degree of a Doctor of Osteopathic Medicine. Licenses and Affiliations. David W. Simonak, DO has been registered with the National Provider Identifier database since July 20, 2006, and his NPI number is 1093735151. Book an Appointment. To schedule an appointment with Dr. David W. Simonak, please call (817) 498-1818..