About
Armando Siqueiros, MD, FACP is a board-certified internist who has practiced in San Luis Obispo, California for more than three decades. He earned his Bachelor of Science in Biology from the University of California at Santa Cruz in 1983. He then completed his Doctorate of Medicine at the University of California at Irvine in 1989. His internship followed at UC Irvine before he completed his residency in Internal Medicine at the Long Beach Veterans Administration Medical Center through the University of Irvine Internal Medicine Program from 1990 to 1992.
Dr. Siqueiros holds certification from the American Board of Internal Medicine. His clinical interests center on cardiovascular health, diabetes, hypertension, and preventive medicine. He served as President of the San Luis Obispo County Medical Society in 1995-1996 and directed the Development and Management of the French Hospitalist Program from 2002 to 2009. He holds affiliations with French Hospital and Sierra Vista Regional Medical Center. Outside the office, he runs, hikes, and fishes, and he participates in the Cal Poly Distance Club. He approaches every patient relationship as a partnership built on earned trust and mutual respect.
Education & Training
Undergraduate
University of California at Santa Cruz, B.S. Biology, 1983
Medical School
University of California at Irvine, Doctorate of Medicine, 1989
Residency
Internal Medicine, Long Beach Veterans Administration Medical Center/University of Irvine Internal Medicine Program, 1990-1992
Additional Training
Internship: University of California at Irvine, Irvine, CA, 1989-1990
Certifications
Conditions Treated
Who is Dr. Siqueiros right for?
Dr. Siqueiros is an excellent fit for adults seeking a long-term primary care relationship with a seasoned internist. Patients managing cardiovascular disease, diabetes, or hypertension benefit directly from his clinical focus. He works well with patients who want a personalized wellness plan grounded in thorough diagnostic screening. Adults looking for consistent, direct access to their physician, including after-hours phone availability, will find his approach well-suited to their needs.
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Frequently Asked Questions
Dr. Siqueiros focuses on cardiovascular disease, diabetes, and hypertension, alongside broad preventive medicine. He holds board certification from the American Board of Internal Medicine. His 31 years of practice in San Luis Obispo also give him deep familiarity with the local specialist network for complex cases.
Yes. Dr. Siqueiros holds certification from the American Board of Internal Medicine. He also carries the FACP designation, reflecting his fellowship standing with the American College of Physicians.
Dr. Siqueiros earned his medical degree from the University of California at Irvine in 1989. He completed his internship at UC Irvine and then trained in Internal Medicine at the Long Beach Veterans Administration Medical Center through the UC Irvine Internal Medicine Program, finishing in 1992.
Dr. Siqueiros has practiced in San Luis Obispo, California for 31 years. That tenure has allowed him to build lasting relationships with patients and a broad referral network of local specialists.
Dr. Siqueiros views medicine as a partnership built on mutual trust and respect. He believes no single formula fits every patient and tailors each wellness plan individually. He works alongside patients as a team to set and pursue their health goals.
Yes. Dr. Siqueiros is reachable by phone after hours and on weekends. Members can contact him directly for urgent matters without waiting for the next scheduled appointment.
Dr. Siqueiros served as President of the San Luis Obispo County Medical Society in 1995-1996. He also directed the Development and Management of the French Hospitalist Program from 2002 to 2009. He has participated in the Cal Poly Distance Club since 2010.
Dr. Siqueiros holds affiliations with French Hospital and Sierra Vista Regional Medical Center, both in the San Luis Obispo area. These affiliations support continuity of care when patients require hospital-level services.
Doctor profile last updated June 6, 2026