Dr. Michael Koumjian

Dr. Rolf R. Drinhaus, MD

Dr. Rolf R. Drinhaus operates a medical practice on Hancock Avenue in Murrieta, serving the broader Temecula Valley and surrounding communities. The practice handles general internal medicine and primary care — the kind of appointment-based office where established patients manage chronic conditions, receive preventive screenings, and get referrals to specialists when needed. This is not an urgent-care walk-in; it's a traditional primary-care model built around continuity with a single provider. The patient base skews toward adults managing ongoing health needs rather than acute episodic care, and toward those with insurance coverage and established provider relationships. For residents new to the area or changing providers, Drinhaus takes new patients through standard medical-office channels — insurance verification, chart transfer, first-appointment paperwork. For anyone in the valley without a primary-care anchor or needing a doctor who knows their history and medication list, an established internal-medicine practice like this fills that role more efficiently than urgent care or emergency department visits would.