Melissa Nothnagle, MD

Program Director

Dr. Melissa Nothnagle joined NMC as Family Medicine Residency Director in 2017. A native New Englander, Dr. Nothnagle first ventured west to attend medical school at UC San Francisco. She completed residency at Brown University in Rhode Island, where she then served as faculty and program director. Dr. Nothnagle earned a Master of Science in Health Professions Education from the University of Maastricht in the Netherlands and has published educational research on abortion training, procedural skills training, professional identity formation and self-directed learning. Her clinical interests include reproductive health, maternal child health, and caring for Latino patients. She is fluent in Spanish and enjoys travel, vegetarian cooking, CrossFit, art history, sailing, and spending time with her husband and son.

Marc Tunzi, MD

Assistant Program Director

Dr. Tunzi grew up in the small town of Spreckels, about 5 miles from Salinas. After graduating from Santa Clara University in 1980 and the University of California, San Diego, School of Medicine in 1984, he completed a Family Medicine Residency at the UCSF-Fresno program in 1987. Together with his family physician wife, Dr. Danielle Acton, Dr. Tunzi spent two years at the Indian Health Service Hospital in Crow Agency, Montana and four years at a community/migrant health center practice in Twin Falls, Idaho, before returning to Salinas to join the faculty at NMC in 1993. He was our Program Director from 2000 to 2005. Dr. Tunzi’s special medical interests are medical ethics and behavioral issues, though he really sees himself as a true family physician generalist more than anything else. He completed a Masters in Bioethics in 2012. His wife, Dr. Danielle Acton, is also a family physician. He has three grown children - a lawyer, an educator, and a medical student. He tries to amuse himself, the residents, and the rest of the staff by whistling his way around the hospital.

Abril Arias, MD

Dr. Arias specializes in Family Medicine and received her medical degree from Autonomous University of Baja California School of Medicine in Tijuana, Baja California, Mexico. After medical school she became part of the University of California, Los Angles International Medical Graduate Program. She completed a Family Medicine Residency at University of California, San Diego, serving as Chief Resident of the program in 2012. During her residency, Dr. Arias was named Outstanding Intern in Labor and Delivery by the Obstetrics Department. She was also a member of the UCSD Perinatal Practices Committee that sets policy for patient care in the labor, delivery and post-partum departments. Dr. Arias was initially attracted to Salinas for the Obstetrical Fellowship. She completed her year in training here at Natividad Medical Center and loved the community and the patients so much that she decided to stay. Her special interests include: Obstetrics, Underserved Medicine and Teaching. Dr. Arias is fluent in English and Spanish. 

Matthew A Calzetta, MD

Dr. Calzetta was born in Salinas and grew-up in Monterey County. He attended University of California: Santa Cruz, then medical school at University of Southern California. He completed an Internal Medicine and Pediatrics ("MedPeds") residency at Tulane Medical Center in New Orleans, then returned to Salinas and signed on to work and teach at Natividad Medical Center. It's great to be back home!

David J. Goldstein, MD

Dr. David J. Goldstein joins the faculty at Natividad Medical Center after a three-year stint as Assistant Director of the Waukesha Family Medicine Residency in Waukesha, Wisconsin. He was also Assistant Professor at the Department of Family and Community Medicine at the Medical College of Wisconsin in Milwaukee. Dr. Goldstein, who served in the U.S. Navy for 10 years, received his bachelor's degree in 1997 from Rutgers College, New Brunswick, New Jersey and his M.D. in 2001 from Robert Wood Johnson Medical School of Rutgers University in Piscataway, New Jersey. Shortly after graduating, he served a one-year internship at the Naval Medical Center Portsmouth in Portsmouth, Virginia. During his service in the Navy, Dr. Goldstein served as General Medical Officer at the U.S. Navy Recruit Training Command, Great Lakes, Illinois; two years as Flight Surgeon at the U.S. Navy Carrier Air Wing Eleven Detachment, Oak Harbor, Washington; and two years as Flight Surgeon at the U.S. Navy Training Air Wing Six in Pensacola, Florida. After leaving the Navy in 2007, he served a three-year residency at the Columbia-St. Mary's Family Medicine Residency in Milwaukee. Just prior to his position at the Waukesha Family Medicine Residency, he served two years as Adult Hospitalist at Presbyterian Hospital in Albuquerque, New Mexico.
In addition to being assistant professor at Medical College of Wisconsin, he also was a Clinical Assistant Professor at Family and Community Medicine at the University of New Mexico in Albuquerque. He is a member of the American Academy of Family Physicians, Society of Hospital Medicine and the Society of Teachers of Family Medicine, and is on several boards and committees, including as chairman of the Procedure Competency Task Force of the Council of Academic Family Medicine. During his time in the Navy he was awarded the Navy/Marine Corps Commendation Medal and the Navy/Marine Corps Achievement Medal.

Jessica Taylor Goldstein, MD

Dr. Jessica Goldstein, who specializes in family medicine and obstetrics, joined the Natividad Medical Center staff after three years as Assistant Professor of Family Medicine at Medical College of Wisconsin Family Medicine Residency in Waukesha, Wisconsin.
Like her husband, Dr. David J. Goldstein, she served in the U.S. Navy, and was honorably discharged in July 2009. During her time in the Navy she served as Naval Flight Surgeon at Camp Pendleton in California for two years and as Naval Flight Surgeon for two more in Milton, Florida. After graduating with a bachelor's degree from the University of California Davis, Dr. Goldstein received her M.D. in 2001 from the Northwestern University Feinberg School of Medicine in Chicago, Illinois. Shortly after graduating, she served an internship at the Naval Hospital Camp Pendleton and trained as a flight surgeon at the Naval Aerospace Medical Institute in Pensacola, Florida. She also served a three-year residency at Columbia St. Mary's Family Medicine Residency in Milwaukee, Wisconsin and a two-year fellowship at the University of New Mexico Maternal Child and Reproductive Health Fellowship in Albuquerque, New Mexico. In addition to her bachelor's and doctorate degrees, she also received a Public Health Certificate from the University of New Mexico in Albuquerque. Dr. Goldstein was honored in "Top Docs of Albuquerque for Family Practice" by Albuquerque Magazine in both 2011 and 2012. She has been awarded the Navy/Marine Corps Achievement Medal, Global War On Terrorism Expeditionary and Service Medals, Presidential and Naval Unit Citation for OIF, National Defense Medal, and ribbons for Fleet Marine Force, Sea Service Deployment. She was also deployed in 2003 for five months to Kuwait and Iraq in support of Operation Iraqi Freedom. Her family medicine interests include maternal, child, reproductive and preventative healthcare, and teaching and working with the underserved. In her leisure time she loves to run and has completed 11 marathons, including first place for military women ages 20-29 at the San Diego Marathon in 2002. She is also a proud mother of three daughters.

Bonnie Hall, MD

Caring and compassionate, Dr. Bonnie Hall is an obstetrics fellowship trained family physician who is dedicated to excellent care for her patients. She believes in treating each patient as family. She values the time and concerns of her patients and will try to thoroughly care for her patients. She speaks Mandarin Chinese fluently and basic Spanish. Dr. Hall has 3 children and a loving husband and enjoys gardening. She sees patients at Laurel Vista Clinic and Laurel Family Practice and works at Labor and Delivery at Natividad Medical Center one day a week.

Edward Macias, EdD

Dr. Macias is the Director of Behavioral Science, and Director of Training for doctoral level psychology interns. Originally from LA, he graduated from UC Riverside in psych, then from UCLA with an MSW degree. He went to Harvard for a Doctoral degree in counseling and consulting psychology, where he also trained as a neuropsychologist. He has held clinical and teaching positions at Lowell Community Health Center, North Shore Children’s Hospital and the Murray Research center, all in Massachusetts. Dr. Macias is also in private practice and enjoys yoga, hiking, racquetball, photography, magic, and racing at Laguna Seca. You can ask him for a ride in his race car, but you have to bring your own helmet!

Walter Mills, MD

Dr. Mills says “I love being a Family Physician, but love teaching family medicine even more!” He joined the Residency in 2014 after being part of the UCSF Department of Family and Community Medicine at Santa Rosa since 1986. He directs the Geriatrics and In Patient Family Medicine Rotations, and Faculty Development. Prior to joining Natividad, as a Program Director, he developed a new Kaiser Permanente residency in Santa Rosa and new medical student programs for UCSF and Touro Medical Schools. As Deputy Director for the Sutter Santa Rosa program, he founded an Integrative Medicine Fellowship, PCMH Ambulatory Care Curriculum, and Performance Improvement Primer/Curriculum. He serves on the CAFP Board of Directors, is Vice Chair of the CAFP Statewide Medical Education Committee, as well as the Resident and Medical Student Affairs Committee.  He was Co-Director of the UCSF Northern California Faculty Development Fellowship. Dr Mills attended Notre Dame, UCSD Medical School, and UCLA-Santa Monica FM Residency, earning a Master’s of Medical Management from the American College of Physician Executive's University of Southern California program in July 2002; Fellow of ACPE (FACPE) in 2005; President, CEO, and Medical Director in several medical groups; CMO for a nine site FQHC; CAQ in Geriatrics; American Board of Integrative Holistic Medicine being a certified meditation instructor and founder Northern California Center for Well-Being; AAFP Residency Solutions Business Consultant.  Dr Mills has spoken nationally on residency innovation, finding balance and joy in a medical life, and the Patient Centered Medical Home. 

Minerva Perez-Lopez, M.D.

Dr. Perez-Lopez, a Salinas native who graduated from Alisal High School, is distinguished with honors, scholarships, and academic recognitions. She received her medical degree from Brown University School of Medicine in Providence, Rhode Island. She completed her residency at the Family Medicine Residency Program at Natividad Medical Center, where she was named Chief Resident in 2005 and was awarded the department's Hannon-Lauderdale Memorial Award for Outstanding Performance in Residency. She then completed an Obstetrical Fellowship at Santa Clara Valley Medical Center in San Jose, California. Dr. Perez-Lopez says her educational background offered outstanding opportunities, but her goal was always to return to the community she knows and loves to be a family physician. Dr. Perez-Lopez is fluent in English and Spanish. Dr. Perez-Lopez is also the vice chair of the board of directors of the Natividad Medical Foundation, which is dedicated to philanthropically supporting Natividad Medical Center in its mission to provide health care access to all patients regardless of their ability to pay.

Eric Sanford, MD

Dr. Sanford is the Co-Director of Community Medicine. He attended medical school at USCF, and residency at UCSF-Fresno. Interested in the underserved, he has worked at the Berkeley free clinic and in Micronesia with the Peace Corps. He is now a primary care physician in the Seaside Family Health Center and has done research on the lead epidemic in that community. He is a physician member for the local MediCal HMO advisory group. He enjoys surfing, astronomy, backpacking, traveling and cruising in his ’62 Corvette.

Debi Siljander, MD

Prior to joining Natividad, Dr. Siljander served as medical director of Together Health Network (THN), a statewide network of hospitals and healthcare providers in Michigan. She has been a sports medicine and family practice provider for more than 10 years, working at the Monterey Physicians Medical Group and MedQuan Sports Medicine, PC. Dr. Siljander is passionate about healthcare transformation initiatives that optimize patient care and experience.

Sally Tirado, LCSW

As Co-Director of Community Medicine, Ms. Tirado has created an integrated Community Medicine curriculum. She holds masters degrees in Social Work, Nutrition and Education. Before joining the faculty, Sally served as a medical social worker at Natividad and as a consultant on cross- cultural health. Her background includes community organizing, labor management work with the United Farm Workers, health education, and ESL teacher. As a private practice psychotherapist, she focuses on domestic violence, women’s issues and mind/body therapies. Sally is also a recognized screenwriter and has won International film festival awards. Her other special interests are dance, cross-country skiing and hiking.

Beth Varadian, DO

Dr. Varadian joins our faculty with enthusiasm as a former Chief Resident of the Natividad Family Medicine Residency Program in 2015. She recently completed a Fellowship in Geriatrics at Stanford and returned to work with the FP Residents in Geriatric Clinic and skilled nursing facility rounds. She speaks English and Spanish and is committed to caring for the unique patient population in Monterey County. She believes in an individualized, patient-centered approach to providing comprehensive, evidence-based care to patients ages 0-100+. Dr. Varadian was a high school biology teacher and a girls lacrosse coach in Brooklyn prior to medical school at the New York College of Osteopathic Medicine. She studied medicine through a Problem Based Learning Curriculum and completed a Predoctoral Fellowship and Masters Degree program there in Neuromusculoskeletal Medicine before moving to California for Residency. In her free time, she runs trail ultramarathons and chases after her toddler, husband, and dog under the redwoods of Santa Cruz.

Christina Zaro, MD

Originally from Petaluma, CA, I attended college at UC Davis, majoring in human development, then medical school at Medical College of Pennsylvania, now known as Drexel University in Philadelphia. I took an experimental problem-based teaching tract, learning in small group case reviews instead of lectures. After graduating, I went on to complete my residency training at the Ventura County Medical Center, a program much like Natividad. My husband and I then spent almost a year travelling and volunteering in Central America. I first studied tropical medicine in Peru and used some of this knowledge in small hospitals in Nicaragua, Honduras, and Chiapas, Mexico. On return in 2002, I landed in King City, CA, where I had worked in a small rural hospital and community clinic until leaving recently to become part of the medical staff at Natividad. We have two boys, ages 8 and 11. I like to mountain bike with my family, cook, do yoga and dance.



Natividad Medical Center • 1441 Constitution Blvd. • Salinas, CA 93906 • (831) 755-4111