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Rosaasen Family Medicine is a family and aesthetic medicine practice located in Thousand Oaks, California. Owned and operated by Dr. Jonathan Rosaasen and his wife, Dr. Amanda Rosaasen, the first-rate practice serves patients throughout Ventura County and the greater Los Angeles area.


Drs. Rosaasen are guided by the belief that “old-fashioned” doctor-patient relationships aren’t a thing of the past. At Rosaasen Family Medicine, patients are encouraged to be active participants in their own health care. Health maintenance and preventive medicine are the practice’s primary focus because both Drs. Rosaasen strongly believe that many diseases and their complications can be avoided or minimized through lifestyle modifications. At Rosaasen Family Medicine, every patient receives personalized care designed to meet their needs and health goals.     


Because Drs. Rosaasen strive to minimize their administrative duties, they’ve made Rosaasen Family Medicine a fully functioning paperless practice. This allows both physicians to have secure access to patients’ medical information at any time. It also gives patients a way to communicate with Drs. Rosaasen and office staff, request prescriptions, schedule appointments, and view labs and studies.

Choose Your Provider

Jonathan Rosaasen, MD

Family Medicine Physician


Amanda Rosaasen, MD

Family Medicine Physician SteadyMD

Erin Esgate, PA
Physician Assistant
Taelor Young PA-C
Physician Assistant

© 2019 Rosaasen Family Medicine

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Tel. (805) 492-1015   Fax: (805) 492-2035

187 E Wilbur Rd Suite 100, Thousand Oaks, CA 91360

Hours: Monday - Friday 8:00 AM - 5 PM