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We are a team of physicians and PAs that base our success on our patients’ long-term good health.
We believe in personalized and comprehensive health care, through physical, emotional, and spiritual healing.
We provide a range of medical services at our clinics, from routine preventive care to management of chronic diseases such as diabetes and high blood pressure.
Dr. Winston C. Wong, MD
Dr. Winston C. Wong, MD
Dr. Wong graduated from Meharry Medical College at the top of his class. He did his internship at Baylor College of Medicine/ Texas Heart Institute and finished specialty training in both Internal Medicine and Pediatrics at USC Medical Center. In 2010, Dr. Wong founded Joshua International Ministries and travels internationally to offer free medical services and education to developing countries. Dr. Wong is the recipient of many awards, but the one he looks forward to the most is to hear his Creator God say, “Well done, good and faithful servant.”
Dr. Kwan Tan, MD
Dr. Kwan Tan, MD
Board-certified in Internal Medicine, Dr. Tan has been with Joshua Medical Group since 1994. He was born in Malaysia, but grew up in San Francisco, CA. He graduated from Oral Roberts Medical School, Oklahoma and completed his residency at Loma Linda University. He is married with two lovely children. He enjoys spending time with them, riding bicycles and playing sports. He is also active at his church and has traveled on several short-term missions to China, Ghana, Nigeria, Kazakhstan and Mexico.
Dr. Andrew Mui, MD
Dr. Andrew Mui, MD
Dr. Mui received his medical training from Oral Roberts Medical School and completed his internal medicine residency training at UCSF – Fresno. He joined Joshua Medical Group from 1993 to 1999, and after having served with his family in China for 14 years, he rejoined Joshua in 2014. He loves his patients and wants to help them physically, emotionally and spiritually. “Let your light shine before men in such a way that they may see your good works, and glorify your Father who is in heaven” (Matthew 5:16).’
Juliana Wilson, PAC
Juliana Wilson, PAC
Juliana graduated as a Physician Assistant from USC in 2001. Upon graduation, she worked at the Orange County Rescue Mission, serving the homeless and underprivileged of Orange County with a fully equipped, 32-foot mobile medical facility. She later joined Joshua in September 2005, where she continues to serve the community with Christ-centered patient care. Juliana is married with four children. When she is not at work, she enjoys being actively engaged in the raising and homeschooling of her children.
Lawrence Tsai, PAC
Lawrence Tsai, PAC
Lawrence received his Master of Physician Assistant Practice from USC in 2010. He joined Joshua shortly after and loves being part of the Joshua village. He sees patients of all age groups and strives to bring smiles and comfort to each one. He is married, has three sons, and can be found around the center playing basketball, guitar, studying the Bible, or fixing a computer.
Chao Kao, NP-C
Chao Kao, NP-C
Chao received his first Master's in Social Work from Cal State Long Beach in 2012. Following his mentor's footsteps, he pursued his Master's in Nursing and post Master's for nurse practitioner in 2019 from Western University of Health Sciences. He joined Joshua Medical in 2021. He is proficient in Mandarin and is currently learning multiple languages. He enjoys traveling and learning about different cultures. He is usually the first provider to enter the building, and always strives to bring the best care to all his patients.
Caleb Kil, PAC
Caleb Kil, PAC
Caleb received his Master of Physician Assistant Studies from South University in 2021. He joined Joshua Medical shortly after and loves being part of the Joshua Village.
Sarah Chan, PAC
Sarah Chan, PAC
Sarah received her Master of Science in Physician Assistant Studies from DeSales University in 2021. Upon graduation, she worked in Skid Row for two years with the Los Angeles Christian Health Centers. She practiced both street and family medicine in a wide range of settings, including the Metro Line, medical vans, homeless shelters, and traditional clinic environments. Sarah joined the Joshua Medical family in 2023 and continues to provide Christ centered care to patients of all ages. On her free time she can be found spending time with her husband and daughter, playing tennis and pickleball, biking, and serving her local church.
Alongside our exceptional providers, we are supported by a dedicated team of front office staff, medical assistants, and scribes who are here to guide you through every step of your visit. They work thoughtfully behind the scenes to help ensure your experience is smooth, efficient, and as comfortable as possible. Together, the Joshua Medical team is proud to serve our patients in eight or more languages, allowing us to care for our community with clarity, respect, and understanding.
Our Story
Our Story
Aloha, please allow me to introduce the new Joshua Medical Center on board the S. S. Ao E Komo. A cruise ship on land.
Over 30 years ago Joshua Medical was founded with a mission to “preach the Gospel and heal the sick” (Luke 9:2). Today, Joshua is a Village, our staff are our cousins and our guests come for healing.
Joshua Medical Center is located in the heart of La Palma on 7872 Walker Street, next to La Palma City Hall and across the street from La Palma Hospital. It’s a 2-story building with 30,000 square feet on each deck. Deck 1 South is where Joshua Medical Clinic is located. Deck 1 North is Kalani and ‘Health Spring’. At Health Spring we provide physical therapy, occupational therapy, chiropractic and acupuncture care. The professionals and facilities are at your disposal. You set your goals and take charge of your health, we provide the support.
Deck 2 is the “Kauhale” which means Village in Hawaiian. There you’ll find passion for the Soul. The Kauhale is our community center. Members can gather for shows and relaxation; there are game tables, ping pong tables and a martial arts dojo. The Tiki Bar is open for coffee and snacks. If you can put up with the cousins, you are always welcome to have lunch at the Pacific Beach. Also on Deck 2 we now have Moana, a space that provides new learning opportunities through immersion.
In the Hawaiian language, “Ao” is the “light of dawn”, “E Komo Mai” means to welcome. Each morning when you board the S. S. Ao E Komo we’ll embrace the light of dawn as we embark on our adventure together.
Doctors at Joshua Medical are professionals in the art and science of caring. Dr. Winston Wong takes care of Geriatrics, Diabetes and Pediatrics. Drs. Andrew Mui and Kwan Tan specialize in Internal Medicine. Juliana Wilson, Lawrence Tsai, Chao Kao, Caleb Kil and Sarah Chan are certified Nurse Practitioner and Physician Assistants in Family Practice. Together with the crew on board the Ao E Komo, we strive to provide healing for you and our communities.
I pray you will find us faithful.
Winston C. Wong, M.D.
Captain, S. S. Ao E Komo
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