Dr. Alethea Poste

Family Physician 

Single Oak Office

Get to Know
Dr. Alethea Poste

Get to Know Dr. Alethea Poste

Dr. Poste grew up in San Pedro, CA, where she studied at California State University Long Beach. Her passion for medicine began to take root which led her to further studies at the Universidad Autónoma de Guadalajara School of Medicine and later at New York Medical College. Following her education, she completed her residency at the Mercy Health Family Medicine Residency Program in Janesville, WI.

Witnessing her grandfather’s illness firsthand, and being his English translator during hospital visits, the respect her grandfather held for his physicians sparked a desire within her to follow in their footsteps. Encouraged by her family, she aimed to pursue medicine, drawn by the opportunity for hands-on patient care to make a meaningful difference in their well-being.

Outside of the clinic, you can find her spending time with her husband, two children, and their cat and dog. She also enjoys cooking, traveling, learning about different cultures, and doing Peloton workouts.

Get to Know Dr. Alethea Poste

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Single Oak Doctor's Office - Rancho Family Medical Group

Single Oak Office

28780 Single Oak Dr, Suite 160
Temecula, CA 92590

Office: (951) 252-8650

Hours: Monday – Friday 7:30am – 5:00pm

Interested in becoming a patient?


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RFMG Benefits

Hospital Affiliations

Rancho Family Medical Group is affiliated with the following hospitals: Loma Linda Murrieta, Rancho Springs Medical Center, Temecula Valley Hospital, and Inland Valley Hospital. We are proud to say that we have our own team of hospitalists at each of these hospitals to care for our patients.

Patient Relations Specialists

Meet our Patient Relations Specialists! They make switching doctors a breeze. Our team is here to serve our senior community and be available for insurance based questions throughout the duration of your care. If you have questions about switching doctors, they have a direct line to assist you.

Become Well Within

Here at Rancho Family Medical Group, our goal is to extend your care beyond the four walls of the exam room. Well Within is an online educational library created to educate our patients and community on how to live a health-focused lifestyle. We have educational courses, cooking demonstrations, and more!

Interested in becoming a patient?

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Who We Are

We are family physicians serving south Riverside county with the highest quality of care. Rancho’s goal is to approach medicine differently by offering more cohesive care and education that extends beyond the four walls of the exam room. We do not just make suggestions and write prescriptions, we have taken steps to improve the health of our patients. Our family physicians have developed educational content that empowers their community to make healthy lifestyle changes.  We also have free senior centers for our patients 65 and older that are full of exercise and nutrition classes as well as full online courses teaching a wide variety of health topics. We pride ourselves on going beyond the exam room to make our community healthier and happier.

How do I request a prescription refill?

You can request a prescription refill by logging into your MyChart account and requesting a refill on the Medications page, or you can call (951) 676-4193 to request a refill over the phone.