Dr. Joni M. Koren has 15+ years of experience in family medicine. Education. Joni M. Koren, DO earned a degree of a Doctor of Osteopathic Medicine. Licenses and Affiliations. Joni M. Koren, DO has been registered with the National Provider Identifier database since June 01, 2005, and her NPI number is 1154323368. Book an Appointment.