Mark R Hollemon, DO Primary Care Specialty: Internal Medicine Sub Specialties: Osteopathic Medicine, Osteopathic Manipulation Clinical Interests: Alternative/Complimentary Med, DOT Physicals Languages: English, Interpreters Available Gender: Male Education and Certification Medical School: Texas College of Osteopathic Medicine. Residency: Oregon Health & Science University. Internship: Oregon Health & Science University. Contact Information Practice Name: Mark Hollemon DO Care Locations Primary Address Legacy Good Samaritan Medical Center 1015 NW 22nd Ave. Portland, OR, 97210 Phone: 503-413-7711 Toll-Free: 1-800-733-9959 Secondary Address Mark Hollemon DO 2330 NW Flanders St, Ste 104 Portland, OR, 97210 Phone: 503 224-0817 Fax: 503 224-0839 Clinic Hours: Weekdays