The Physicians at Arroyo Medical Group

Amanthi Chandrasena, M.D.

"I love my new doctor! So nice to not feel rushed during appointments."
Dr. Amanthi Chandrasena is a board certified family physician. She grew up in Palm Springs, CA and received her medical degree from the Medical University of Lublin. She completed her family practice residency at the Western Pennsylvania Hospital in Pittsburgh, PA, where she was elected Chief Resident. Dr. Chandrasena loves family medicine and prides herself on the great connection she shares with her patients. Her passion is preventive wellness and helping her patients achieve their best health.

​She enjoys spending time on California’s central coast with her husband and twin daughters.

​Cary Fitchmun, M.D.

"Dr. Fitchmun is so caring. He listens carefully and responds appropriately. His staff is courteous and efficient. Overall, my experience as a patient is superior." 
Dr. Cary Fitchmun, MD, has dedicated his life’s work to serving his patients with personalized care and customized medical treatment plans. He serves as the managing partner at Arroyo Medical Group in Pismo Beach. He offers comprehensive primary care, along with an enhanced Concierge Choice + Longevity program for patients who are interested in enhanced focused on early interventions and lifestyle modifications to support a longer lifespan and health-span.
 
Dr. Fitchmun is board-certified and a member of the American Academy of Anti-Aging Medicine and the American Academy of Family Physicians.

Dr. Fitchmun maintains a thriving practice focused on maximizing physical health, skin health, and disease prevention.  Educating medical providers continues to be a vital aspect of his ongoing dedication to superior medical care, and Dr. Fitchmun routinely gives lectures to the local medical community and enjoys teaching residents, medical students, and nurse practitioner students.

In 1993, Dr. Fitchmun graduated from UC Berkeley with honors and then attended UC Davis School of Medicine, where he was the recipient of the prestigious Regents Scholarship. He graduated from the program with honors, followed by a residency in family medicine with an emphasis on dermatology.

For patients who make long-term health a priority, learn more about his Concierge Choice + Longevity program.

​​Happily married with two children, Dr. Fitchmun also enjoys surfing, swimming, hiking, and traveling in his spare time.

Megan Malzone, M.D.

"Dr. Malzone is fabulous! I particularly appreciate her openness and how she tries to establish the root cause of issues, rather than just treating the symptoms with medications."
Dr. Megan Malzone, our esteemed Medical Director, is not just a physician but a dedicated advocate in your wellness journey. Her medical career began at the University of Washington School of Medicine, renowned for its consistent ranking as the #1 institution in primary care.  Her residency in Internal Medicine at Santa Barbara Cottage Hospital marked the beginning of over 15 years of devoted service on the Central Coast, solidifying her as a respected figure in our community.
 
With an emphasis in women's health, diabetes, dermatology, mental health, and complex medical conditions, Dr. Malzone is a versatile physician who goes beyond traditional roles. As Medical Director at both Aesthera and Arroyo Medical Group, she exemplifies a steadfast commitment to elevating healthcare standards.
 
A graduate of the prestigious Alpha Omega Alpha Honors Society and a member of the American College of Physicians, Dr. Malzone upholds the pinnacle of medical standards. Through her service as Quality Improvement Chair at Arroyo Grande Hospital and as an active team member of Aledade, an institute dedicated to providing quality healthcare to all, she has proven her dedication to innovation and the thriving of independent primary care practices.
 
Beyond her extensive professional achievements, Dr. Malzone is celebrated for her compassionate bedside manner.  Her warmth, empathy and meticulous approach to medicine forge a trusted partnership with individuals and families alike.
 
Dr. Malzone is not just a healthcare provider; she is a true advocate for wellness. Embracing a comprehensive approach, she empowers patients through education, ensuring they are active participants in their well-being. Her kind and caring nature foster a supportive environment for every individual under her care.
 
Dr. Malzone's enjoys travel, cherishing quality time with family, exploring nature through hiking, practicing mindfulness with yoga, and immersing herself in the arts. These passions contribute to her well-rounded approach to life, healthcare and helping you achieve your best health. 

David Ruiz, M.D.

"I absolutely love the service I receive from Arroyo and the care I receive from my physician, Dr. Ruiz!"
Dr. Ruiz earned his Bachelor of Science degree from the University of Redlands in California and obtained his medical degree from the University of California, Los Angeles. He stayed in Los Angeles to complete a three-year Family Medicine Residency Program at White Memorial Medical Center.

He and his wife moved to the Central Coast to raise their three boys twenty years ago. He enjoys exploring the outdoors, hiking, fishing, and biking. Dr. Ruiz plays the guitar and sings in his church choir. Continuing his musical interests, he has sung with the San Luis Obispo Vocal Arts Ensemble for seven years.

As a Board Certified Family Physician, Dr. Ruiz provides high quality medical care with an emphasis on prevention. He works closely with his patients to help them achieve and maintain healthy habits to nurture mind, body, and spirit.