Our health professionals are some of the best trained medical practitioners available.  This is because they are not only trained in conventional diagnosis and drug therapies just like your average family practice MD, but they are also trained in Functional Medicine, Nutritional Medicine, Herbal Medicine & Detoxification providing you with an Holistic Integrative Medical approach.

Dr. Michael Kwiker, D.O.
Founder & President, Health Associates Medical Group

With over 55 years of experience in Family Medicine, Dr. Michael Kwiker is a pioneer in holistic and integrative healthcare in the Sacramento region. A respected leader in the fields of Integrative and Nutritional Medicine, he is deeply committed to optimizing health, preventing disease, and treating the whole person—not just symptoms—through strong doctor-patient relationships in a compassionate and educational environment.

Dr. Kwiker earned his B.S. in Zoology from the University of Michigan and received his Doctor of Osteopathy from the College of Osteopathic Medicine and Surgery at Des Moines University in 1970. Following graduation, he completed his internship and served in the U.S. Navy, working at the U.S. Public Health Service Hospital on Staten Island and later at a U.S.P.H.S. outpatient facility in San Pedro, California.

His early career included several years in emergency medicine, serving as an ER physician at Union Memorial General Hospital in New Jersey before becoming Director of Emergency Services at Lebanon Community Hospital in Oregon. In 1976, Dr. Kwiker relocated to Sacramento, where he joined the Sacramento Preventive Medicine Clinic as a staff physician.

Driven by a deep interest in the body’s natural healing capacity and the evolving field of Nutrient-Oriented Medicine, Dr. Kwiker founded Health Associates Medical Group in 1985. His vision was to build a practice that embraced the interconnectedness of body, mind, and environment—combining the best of conventional and alternative medicine to support lifelong wellness.

Dr. Kwiker began studying homeopathy in 1981 and expanded his practice to include blood type-based nutrition in 1996 after exploring the work of Dr. Peter D’Adamo. As a father of three children with blood types O, A, and B, he often jokes that he had a "built-in study group" at home—and has since applied these insights to his patients with remarkable success.

Today, Dr. Kwiker continues to be a guiding force in integrative medicine, inspiring patients and practitioners alike through his decades of clinical experience, commitment to learning, and passion for helping people live healthier, more balanced lives.

Daniel D. VanHamersveld, M.D., FACC
Board-Certified Cardiologist

Dr. Daniel D. VanHamersveld brings nearly five decades of cardiovascular expertise to Heath Associates Medical Group. A graduate of the University of Michigan Medical School in 1976, he completed his residency and Cardiology Fellowship at the same institution before beginning his medical practice in Sacramento in 1981. Over the course of his distinguished career, he has transitioned from interventional cardiology to clinical cardiology, with a deepening focus on prevention and functional medicine.

Dr. VanHamersveld, known by many as “Dr. Van,” spent many years with Sacramento Heart, a respected multispecialty cardiology group, where he emphasized lifestyle-based strategies to reduce cardiovascular risk. Witnessing the rise of obesity, metabolic syndrome, and diabetes, he became increasingly focused on identifying and addressing the root causes of cardiovascular disease—particularly chronic inflammation caused by sugar, processed foods, and industrial vegetable oils. He challenges conventional thinking around cholesterol, advocating instead for real, unprocessed nutrition and individualized care over pharmaceutical dependency.

As the first cardiologist to implant a pacemaker in Sacramento, Dr. Van has long been at the forefront of cardiac care. He is board certified in Cardiovascular Disease and has extensive experience treating conditions such as cardiomyopathy, hypertension, coronary artery disease, angina, and heart murmurs. Known for his thoughtful, patient-centered approach, he avoids one-size-fits-all protocols, relying instead on professional discernment and a deep commitment to his patients' overall well-being.

Dr. Van is excited to join Heath Associates Medical Group, where he continues his mission to empower patients to lead healthier lives through proactive, informed care. His favorite part of being a doctor is making a meaningful difference in his patients’ lives—by helping them heal from the inside out.

“The low risk/high benefit nature of nutrient oriented medicine and the subsequent use of supplements and homeopathy have significantly reduced the need for pharmaceutical intervention.  This, combined with the 30+ years of experience has made the practice of medicine all the more gratifying.”

kirk hamilton pa-c

Kirk is a certified physician's assistant practicing since 1983 and has been working with Dr. Michael Kwiker at Health Associates Medical Group since July of 1986. He is a primary healthcare provider, author, health educator specializing in nutrition, prevention, integrative, functional and lifestyle medicine. He has also been a valued educator to health professionals. As the founder of Clinical Pearls Publications, Kirk provided thousands of summaries of nutrition research and medical interviews to practicing physicians and researchers around the globe until he sold the company to Tishcon Corp. in 2004. Kirk stopped doing online medical-nutrition interviews in 2016 but completed more than 1200 Expert Interviews over 20 years.

In 2009 Kirk began hosting his own podcast show titled Staying Healthy Today (iTunes) interviewing top experts in the fields of nutrition, preventive, integrative and lifestyle medicine. Drawing on his 39 year career, in August 2011 Kirk self-published the book titled "Staying Healthy in the Fast Lane - 9 Simple Steps to Optimal Health." His book serves as a guide for individuals, professionals and policy makers on how to create a new health paradigm that is focused on staying well and prevention as the only real and lasting healthcare reform. Here is what experts say about his book.

He also actively teaches and you can take his FREE online course: "Kirk's 21 Day Healthy Living Program for Busy People,"and, you can also learn from his two YouTube shows, The Sloppy Vegan Cooking Show and the Stay Healthy Today Show. Kirk also provides his"Healthy Living Tips" which he emails weekly of bite size nutrition and wellness research, as well as announcing his most recent podcasts and YouTube Shows.
For more information about Kirk please visit please visit: HealthyLivingforBusyPeople.com StayingHealthyToday.com

Wendy Pomerantz, PA-C, L.Ac.
Certified Physician Assistant & Licensed Acupuncturist

Wendy Pomerantz is a nationally certified Physician Assistant and California Licensed Acupuncturist with over 47 years of clinical experience. Since 1978, she has helped patients achieve lasting wellness by integrating the best of Eastern and Western medical traditions.

Wendy has been at the forefront of Integrative Medicine, specializing in bio-identical hormone therapy since 1995—including hormone pellet therapy for both men and women. Her unique dual training in Western medicine and Traditional Chinese Medicine allows her to treat complex, chronic conditions with a broad and effective clinical toolkit.

Her areas of expertise include:

• Bio-identical Hormone & Pellet Therapy

• Acute & Chronic Pain Management

• Hormonal Imbalance & Fatigue

• Nutritional & Herbal Medicine

• Microcurrent Therapy

• Integrative & Preventive Care

Wendy takes a highly collaborative approach, working closely with patients to uncover root causes of illness and create individualized, holistic care plans. By combining acupuncture, nutrition, functional medicine, and bio-identical hormones, she supports her patients on their journey toward balance, vitality, and optimal health.

With decades of hands-on experience and a deep passion for healing, Wendy remains dedicated to empowering individuals through education, compassionate care, and the integration of science and tradition.

Rose moss, Licensed Vocational Nurse (LVN)
Lead Nurse, IV Therapy Department – Health Associates Medical Group

Rose Moss is a Licensed Vocational Nurse and Certified IV Therapy Specialist who has been an integral part of the Health Associates team since June 2017. As the Lead Nurse of the IV Therapy Department, Rose has become the friendly and trusted face of daily care for many of our patients.

Known for her exceptional competency with needlework and her genuine compassion, Rose has a natural ability to put patients at ease. She is a skilled and empathetic caregiver who builds rapport quickly and delivers safe, unbiased, and effective care. Her calm presence, active listening, and clear communication make her a standout team member in every clinical setting.

Rose earned her LVN credential in 2016 from the Charles A. Jones Career & Education Center, and she went on to complete advanced certification in IV Therapy and Blood Withdrawal through Curram College. Prior to becoming an LVN, she worked her way through school as a Certified Nursing Assistant, gaining valuable experience in both skilled nursing facilities and the Elk Grove Unified School District.

Today, Rose leads the IV department with a combination of precision, leadership, and heart. She manages fellow team members, mentors new staff, and consistently delivers excellent care with a focus on patient safety, comfort, and outcomes. Organized, detail-oriented, and continually learning, Rose is passionate about her role and committed to advancing her skills to best serve patients and her team.