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Our Providers

Murrieta and Menifee Internal Medicine, Geriatric Medicine, Women's Health Clinic Jorge Martinez, M.D.

Jorge Martinez, M.D.

Jorge A. Martinez, M.D. is a board-certified Internal Medicine physician in Riverside County, where he has been practicing medicine for over 28 years. Dr. Martinez specializes in rheumatology, diabetes, and metabolic disorders, in alignment with his focus on Geriatric Medicine and Women’s Health Clinic services. His practice, the Jorge A. Martinez Medical Group, is part of Menifee Global Multi Specialty Group, with locations in Murrieta and Menifee, California.

As an Internal Medicine physician, Dr. Martinez is a primary-care doctor who performs physical exams and treats a wide spectrum of common illnesses in adult men and women. He is certified by the American Board of Internal Medicine, and is licensed to practice in California, Illinois and Arkansas. Past patients have rated him very highly on physician review websites for such traits as: thoroughness in explaining conditions and treatments, taking time to answer questions, and providing needed follow-up after appointments. He was given an overall Excellent rating (5/5 stars) in the categories of Patient Loyalty, Thoroughness of Examination, and General Feedback. 

With 42 years experience, Dr. Martinez currently trains nurse practitioners, and in the past has mentored medical students. In the community he has also volunteered for outpatient care at local churches. Dr. Martinez is bilingual in Spanish and English, and during his spare time, he enjoys traveling with his wife and doing physical activities such as tennis or golf.  

Dr. Martinez is currently welcoming new patients. 


Karen Dress, P.A.

Karen M. Dress, P.A. is certified in the National Commission on Certification of Physician Assistants. Dress is a well-known Physician’s Assistant for the Global Multispecialty Group, Inc. She is specialized in primary care, geriatric care, urgent care, and internal medicines.  


Crystal Gutierrez, N.P.

Crystal Gutierrez is a Family Nurse Practitioner (FNP) with over nine years of experience, especially in critical care. She completed her MS in nursing at Loma Linda University, and during her education was recognized as Mentor and Preceptor to new Registered Nurses. Gutierrez provides comprehensive care needs to patients of all ages in the primary practice setting.