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Francisco Hernández, MD, is a dedicated general physician and the founder of Clinica Medica Hispana, a trusted medical practice serving the Phoenix, Arizona, community since 1998. With decades of experience in primary care and patient-centered medicine, Dr. Hernández is committed to providing compassionate, comprehensive healthcare that supports both physical and mental well-being.

Dr. Hernández earned his medical degree from the National Autonomous University of Mexico in 1974. Early in his career, he traveled throughout northern Mexico to expand his medical knowledge and gain valuable clinical experience. After immigrating to the United States, he completed the required medical examinations and began practicing medicine in Arizona, where he continues to serve patients with dedication and care.

At Clinica Medica Hispana, Dr. Hernández focuses on building meaningful relationships with patients by listening carefully to their concerns and developing personalized treatment plans. His holistic approach to healthcare emphasizes prevention, early diagnosis, and addressing both physical and emotional health needs.

In addition to general medical care, Dr. Hernández is authorized by USCIS to perform immigration medical examinations (Form I-693) for individuals applying for immigration benefits in the United States.

Dr. Hernández founded Clinica Medica Hispana with the vision of creating a practice where every patient is treated with dignity, respect, and high-quality medical care.

Dr. Ricardo La Grotta, MD is a primary care physician. He serves patients at HealthyU Clinics at our Chandler, Arizona clinic.

With over two decades of medical experience, Dr. La Grotta brings his passion and commitment to HealthyU Clinics. Motivated by the organization's dedication to prioritizing patients, he joins with enthusiasm and a belief that the clinic is truly upholding the oath in primary care by putting people first.

Having spent his formative years in diverse regions such as South America, the Caribbean, and the Pacific Northwest, Dr. La Grotta has cultivated a unique perspective. His focus on Primary Care and Urgent Care stems from a seamless blend of practical experience and scientific knowledge.

Although his family has been in the Pacific Northwest for four decades, Dr. La Grotta eagerly embraces Arizona as his new home. He looks forward to immersing himself in the beauty of the state, connecting with its vibrant communities, and indulging in the rich gastronomy that Arizona has to offer.

Robert Claflin, DO, CAQSM, is a primary care and sports medicine doctor. He serves patients at HealthyU Clinics at our Gilbert and Chandler, Arizona, clinics. 

Dr. Claflin started his training in the health field at Arizona State University in Tempe, where he obtained his Bachelor of Science in exercise and wellness. In 2017, he graduated from Midwestern Arizona College of Osteopathic Medicine in Glendale, Arizona. 

In 2020, Dr. Claflin completed his family medicine residency at East Carolina University in Greenville, South Carolina, and his sports medicine fellowship in 2021. 

Including treating patients of all ages, he has worked with high school, collegiate division I, and professional athletes throughout his training and in practice in the sports medicine field. In 2021, he returned to Arizona to work in private practice family medicine and sports medicine. 

Dr. Claflin joined HealthyU Clinics in 2022. In his free time, he enjoys exercising, trying out new restaurants, traveling, going to the movies, and spending time with friends and family. 

Siomara Hercules is a certified Nurse Practitioner with over eight years of nursing experience in orthopedic trauma, palliative care, and colorectal surgery. Her diverse clinical background has shaped her into a well-rounded provider who approaches patient care with empathy, attention to detail, and a deep respect for each individual’s unique health journey. 

Siomara earned her Bachelor of Science in Nursing from Grand Canyon University and her Master of Science in Nursing from United States University. She chose to specialize in urology because of her passion for helping patients feel comfortable, informed, and empowered—especially when navigating personal and often sensitive health concerns. 

Fluent in both English and Spanish, Siomara is committed to creating a welcoming and inclusive environment for all patients. 

Outside of work, Siomara is a proud mom of three and can often be found cheering from the sidelines at her kids' sports games or exploring new restaurants around town. She brings the same energy, warmth, and curiosity to her personal life as she does to every patient encounter.

Hi! Megan Rigby here! I am a doctorate-prepared pediatric and family nurse practitioner specializing in primary care and family wellness. If you are looking for modern medicine with a mix of holistic care, then I am your provider. My focus is on preventative medicine in the most natural way possible. I do not believe in prescribing medications exclusively but rather finding ways to improve health and preventing further illness through complimentary medicine. I started REFRESH HEALTH because I want to change the way we look at medicine. I want your experience with me to be REFRESHingly different from the rest. I am providing a mix of in-clinic, Telehealth and mobile visits in order to make your medical experience convenient and accessible for your family. With 13 years of medical experience; 10 years of nutrition consulting/certification and endless hours of continuing education you can rest assure you will receive the best care possible.

My name is Lily Limon, I am a Family Nurse Practitioner. I have had the privilege of practicing nursing for over 25 years. I have worked in almost every capacity that nursing offers and have settled into the final season of my career as a medical health care provider. I feel that I can empower my clients with the knowledge to enhance their health and educate them to make lasting changes that will help, not only them but their families as well. I will dedicate this chapter of my life to make lasting changes and invest in my community. My diverse background has provided a positive impact and aided in my development of long lasting personal and professional relationships. On a personal note, I have a beautiful family, have been happily married for over 28 years to a wonderful man and we have 4 children and 1 grandchild, a grand dog 7 cat. We also have 2 large dogs- German Shepard & a Lab. I enjoy reading, hiking, serving @ church, volunteering at local events/shelters and helping others.

At Heartistry Nutrition, we treat the whole person rather than their chronic condition. Our approach focuses on individualized nutrition care. We work with your preferences, budget, and health goals to create a custom nutrition plan just for you.

Felicia, a graduate of Arizona State University with a Bachelor of Science in Nutrition, where she also attended a dietetic internship wellness track, brings a wealth of experience in addressing conditions such as high blood pressure, high cholesterol, and heart disease. She’s also the author of Dietetic Intern Guidebook: An Uncomplicated and Practical Guide to Nutrition Intervention, which provides an uncomplicated and practical approach to treat conditions like type 2 diabetes, hypertension, and chronic kidney disease.

Felicia is active in the industry and stays up to date on research as she is a member of multiple dietetic practice groups (DPG) including the Cardiovascular Health and Well-Being DPG, Diabetes DPG, Renal Dietitians DPG, and Healthy Aging DPG. She is also a member of the National Kidney Foundation, and the Central Arizona Academy of Nutrition and Dietetics.

At Heartistry Nutrition, we offer a free 20-minute telehealth consultation to discuss your health concerns and goals, whether you’re interested in  weight loss or need help managing your blood sugar levels or high blood pressure. We offer all our client’s a 75-minute initial consultation and 45-minutes follow-up appointments. During this time we'll discuss your medical history and health concerns in further detail, reviewing your lab values, and providing tailored nutrition plans without forcing diets, ensuring they fit your lifestyle and address your goals. 

We accept most major insurance including Aetna, Medicare, and Blue Cross Blue Sheild to make nutrition care affordable and accessible. Take the first step toward better health — schedule your free consultation today by phone or online.

Michael J Willcox, MD, was born in Oregon and was raised nearby in Glendale, Arizona. He graduated from Arizona State University with a BS in Kinesiology before completing his doctorate at Tulane University School of Medicine in New Orleans, Louisiana. He completed a Transitional Year Internship at Tripler Army Medical Center in Honolulu, Hawaii and Family Medicine Residency at Martin Army Community Hospital on Fort Benning, Georgia. He is Board Certified with the American Board of Family Medicine and the American Board of Obesity Medicine. He has been a practicing physician since 2018.

He served as an Army flight surgeon with the 1st Combat Aviation Brigade and deployed in support of Operation Atlantic Resolve. He has extensive experience caring for service members, veterans, and their families in the field, outpatient clinics, ERs, hospital wards, and ICUs.

Dr. Willcox focused his medical practice on geriatrics because he enjoys patients' desire to develop a trusting relationship and greater continuity of care compared to other age groups. He enjoys working with patients to find treatments that best align with their personal goals and optimize their quality of life, particularly when care can be simplified or reduced to achieve better outcomes.

Dr. Willcox, his wife, and three active children love spending time with their numerous family members in the Valley of the Sun. They love the outdoors, water sports, running, and skiing.

Seokhan Kyle Song D.O. is a board-certified family medicine physician who believes great care starts with listening. With years of experience providing full-spectrum care—from everyday checkups to managing chronic conditions and performing in-office procedures—he offers evidence-based care tailored to each person’s needs. He has a special interest in preventative health, wellness, and making sure his patients leave the clinic feeling informed and confident about their care.

Dr. Song served for 12 years in the Virginia Army National Guard as a combat medic and field surgeon, caring for hundreds of soldiers in multiple deployments overseas. That experience taught him the importance of staying calm, focused, and compassionate—skills he brings to every visit today.

He was born and raised in New York. He earned his medical degree from Edward Via College of Osteopathic Medicine and also holds a Master’s in Physiology from Virginia Commonwealth University. He is fluent in English and Korean and loves working with individuals and families from all backgrounds.

When he’s not in the clinic, Dr. Song enjoys life at home with his wife, three kids, and two cats. His hobbies include golfing, hiking, building reef aquariums, assembling Lego sets (sometimes with his kids, sometimes not), playing board games, and watching movies.

Patients describe him as approachable, thorough, and someone who makes them feel at ease—whether it’s a routine visit or something more complex. Dr. Song looks forward to getting to know you and being part of your health journey.

Umesh Narayanan, M.D. is a native of Tampa, Florida. He completed his undergraduate studies earning a Bachelor of Sciences at the University of Florida in Gainesville, Florida (Go Gators!). He completed his medical school at Saba University School of Medicine in the Dutch Caribbean. He completed his Family Medicine Residency training at the University of North Dakota in Minot, North Dakota. He then went on and completed a Geriatrics Fellowship at the University of Arizona Geriatrics program here in Sun City, Arizona. He loved the area so much and has found permanent residence in Phoenix, Arizona. He is Board Certified in Family Medicine through the American Board of Family Medicine and is Board Certified in Geriatric Medicine through the American Board of Internal Medicine. He is also an academic preceptor for the geriatric fellowship program through University of Arizona/Banner Health. He has fellows and residents rotate with him once a week.
He is married. His wife is a Physician Assistant in Dermatology in the area. In his spare time, he is an avid sports fan and enjoys watching and playing football, basketball, and baseball. He also enjoys hiking. Traveling the world and trying various cuisines is his passion.