Our Providers


Ravinder Singh M.D.

Bachelor of Sciences:  University of Michigan Ann Arbor
Medical Doctor:  Wayne State School of Medicine, Detroit, Michigan
Residency:  Chief Resident Baylor College of Medicine Family Medicine
Personal Interests:  
Travel, Basketball, Avid Reader, Golf
Fanatic for the Wolverines and Lions
Our Philosophy:
We seek to promote wellness and vitality for our patients through a Holistic approach.  Rather than reaching for a prescription during a short visit, our focus is on taking the time to help make changes in lifestyle which will address the core reasons for poor health.  By having people buy into the fact that our choices and environment impact our well being, we establish a partnership in implementing solutions together.  By combining the fundamental aspects of traditional medicine as well as alternative medicine We are able to treat our patients in a comprehensive way.
We’ve established a practice where patients can come, without judgement, for counseling and guidance.

Barbara Santa Cruz, PA-C

Board Certified NCCPA, National Commission of Physician Assistants

LVN: Cerritos College­-Norwalk, California 1973

ADN: Registered Nursing-­Cerritos College ­Norwalk, California 1979

BS-­California State University, Dominguez Hills, Carson California
Department of Health Science

PA-­Charles Drew Postgraduate Medical School, Los Angeles California
Physician Assistant Program, Department of Family Medicine­ 1981

Personal Interests:
Avid Yoga practitioner for the past 12 years. I enjoy all outdoor activities, especially hiking and all water activities. I enjoy leisure time with my children and grandchildren, and look forward to a little travel in my near future.

Philosophy Regarding Health:
After 35 Years of practice, I have come to understand that as we age, the key to optimal health is in creating balance. We create balance in how we choose to eat, how we move, what we emotionally fill ourselves with and how we generate sleep. Our bodies are unique, as they come with all the necessary internal capabilities to regenerate and self heal. We need to honor our bodies with the choices that we make and how we choose to view ourselves. This concept continues to inspire my practice of medicine. It is no longer all about treating chronic illness, but the promotion of prevention of chronic illness. I find satisfaction with inspiring and partnering with my patients on a path of wellness. We have the technology to to extend life, but not necessarily to improve the QUALITY of that life. That is about the choices that you make along the way.

When it comes to aging, the only choices are to accept deterioration or choose restoration. I have chosen restoration. In addition to lifestyle balance, I promote hormonal balance. Hormones regulate our body heat, and ability to think and feel good; hormones keep our bones strong, our brains sharp and our organs functioning. Hormones are what give us our good health and the symptoms we associate with aging are often simply related to this decline in hormones. I look forward to working with the patient who is highly motivated and and filled with the expectations of achieving optimal wellness.


Jessica Vanderkallen, MS PA­C

NCCPA Board Certified: National Commission on Certification of Physician Assistants


BS: Biology/Pre­Med; California State of San Bernardino, CA 2003
MS/PA: Western University of Health Sciences; Pomona, CA 2011

Personal Interest:

Traveling to beautiful places, hiking at the beach, relaxing with friends and family, various sport activities including soccer, golf and tennis.

Philosophy Regarding Health:

Health promotion and disease prevention are concepts that are the mainstay of “treatment” for my patients. Instead of chasing disease processes, we strive to promote primary prevention. This can be only achieved when the patient and provider work as a team to obtain ultimate health. It is the team­based efforts that are the driving force to creating a successful practice for both the patient and the provider. Lifestyle modifications including a healthy diet, regular exercise and activity, adequate sleep and a reduction in social and personal stressors are the formula to a vibrant and healthy way of life.


Heidi Larson, RN, MSN, FNP-C

Board Certified Family Practice, American Academy of Nurse Practitioners (AANP)


BS: Kinesiological Sciences/Biology; Westmont College- Montecito, CA 1988

AD: Registered Nursing; Saddleback School of Nursing- Mission Viejo, CA 1990

MSN/FNP: Masters of Nursing/Family Nurse Practitioner-University of Phoenix, Ontario, CA 2000

Personal Interest:

Working out, health and fitness, avid “boot camper”, hiking, paddle boarding, kayaking, tennis, snow skiing, hanging out with family and friends, attending live sporting events and traveling

Philosophy Regarding Heath:

My philosophy regarding health stems from my long history of competitive athletics. The medical provider acts as the coach and the patient as the athlete. It is the patient who is in the driver’s seat. We strive to provide the most comprehensive and quality health care but it is ultimately the patient who must take personal responsibility to getting well by making good life style choices thru diet and exercise, weight management, taking medications as prescribed, and focusing on wellness rather than disease.