AboutMosaic Family Care Medical Group

At Mosaic Family Care Medical Group, we strive to identify the source of the disease instead of only treating the symptoms. Far too often, patients will attempt to manage their conditions with store-bought medications, vitamins, or herbs. While these can help to provide temporary relief, they will not be effective in treating the true source of the issue. Dr. Juan A. Silva M.D. and Dr. Lisa Ma M.D. can help to diagnose the condition and recommend the most effective course of action for treatment.

Our goal is to help patients in Los Angeles and the surrounding area find long-term relief through our treatment methods. We can help patients through the treatment process. Most importantly, we can continue to provide regular checkups to measure the patient’s current health. With early treatment and preventive care, it is possible to decrease the chance of certain conditions getting worse.

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Juan A. Silva M.D.

Juan A. Silva M.D.

Dr. Silva was born and raised in Boyle Heights. He graduated from Abraham Lincoln High School, enjoyed playing football and was class president his senior year. He attended UC Riverside and received his Bachelor of Science degree in 1992. He went on to UC Davis medical school, receiving his MD degree in 1998. Dr. Silva completed his internship and residency program at White Memorial Medical Center and Family Care Specialists group. He is currently a hospitalist at White Memorial Medical Center and at Monterey Park Hospital in addition to his private practice here at Mosaic Family Care. It was always his dream to start a clinic here in his own home town, and in 2001, alongside Dr. Lisa Ma, his dream was finially realized.

Lisa Ma M.D.

Lisa Ma M.D.

Dr. Ma graduated with honors from the University of California, Riverside; earned her Medical Degree at Loma Linda University, School of Medicine; and completed her Family Medicine residency at (nearby) White Memorial Medical Center. Born in Cincinnati, Ohio, Dr. Ma comes from a diverse cultural background and speaks fluent English, medical Spanish, basic Japanese and Chinese. In addition to her training in traditional medicine, Dr. Ma has also pursued furthering education in natural remedies and has developed a unique holistic skill set with a focus in integrative functional care. She is far from your average physician and believes she was placed on this earth to help others. In this pursuit, Dr. Ma organizes yearly aid trips to Mexico which include medical, dental, and construction assistance to under-served communities.

Hector Castillo M.D.

Hector Castillo M.D.

Dr. Hector Castillo is Board Certified by the American Board of Family Medicine. He graduated from Occidental College where he received a Bachelor of Arts in Biology. He graduated from Keck School of Medicine at USC. He has been in practice for 14 years and is currently a primary care physician and a hospitalist. Dr. Castillo serves on multiple clinical leadership committees at White Memorial Medical Center and AltaMed Health Services. He is a proud husband and father of three wonderful children. He coaches flag football and enjoys time with his family.

Kirstiema Cowan, DNP

Kirstiema Cowan, DNP

Dr. Cowan (DNP) was born in California and raised by her Thai mother who served as an RN in charge of a community hospital. Dr. Cowan’s mother was a “hero” in her eyes. She watched her mother integrate herbs, vitamins and natural remedies with traditional medical treatments to better balance the body and treat diseases for the patients she worked with and treated. Dr. Cowan learned and embraced this holistic model from her “hero” and wanted to create this same model as she developed her own practice moving forward. Dr. Cowan has a solid background in both conventional medicine and integrative medicine, making it easy for her to practice both areas optimally and provide the best approach for her patients. Dr. Cowan attended Frontier Nursing University earning her Doctorate of Nursing Practice. She completed her residency with Mosaic Family Clinic and soon after joined the practice.