Associated Family Physicians
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"Caring for Solano County families for over 50 years"

Our mission at Associated Family Physicians (AFP) is to deliver complete comprehensive medical care from childhood through the golden years. Through the highest standards of quality, integrity, and compassion, our employees are licensed to seek solutions to better meet the needs of our patients, their families, and the community. We value and respect all our employees for their contribution to the success of AFP. We recognize and respect individuals and are sensitive to their unique needs by maintaining the highest levels of honesty, excellence, and confidentiality. We value our colleagues as partners in ensuring patient’s health and safety. We respect our patient’s rights, including their right to direct their healthcare. We work as a healthcare team providing care that is above patient’s expectations by challenging ourselves to go beyond what is asked of us. We celebrate success and work with passion and energy.

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Gilbert Wergowske, M.D., FACP, FGSA

Gilbert Wergowske, MD is an internal medicine specialist in Vallejo, CA and has been practicing medicine for over 25 years. After achieving his Bachelors of Science in Chemistry at the University of Cincinnati in Cincinnati, OH , Dr. Wergowske then went on to complete his medical training at Universidad Autonoma De Guadalajara in Jalisco, Mexico. He followed that with an internship at South Baltimore General Hospital in Baltimore, Maryland. Dr. Wergowske then went on to complete this Internal Medicine Residency program at Wright State University School of Medicine in Dayton, OH followed by his Fellowship at the University of Hawaii in Honolulu, Hawaii.

During Dr. Wergowske’s time in Hawaii he served as Medical Director and Chief of Medical Services at John A. Burns School of Medicine at the University of Hawaii. He then went on to work as Medical Director at Mills-Peninsula Health Services in San Carlos, CA before going on to serve the community as a primary care physician in Benicia for over a decade. Dr. Wergowske has continuously served as an internist at many hospitals including Sutter Solano Medical Center.

Dr. Wergowske’s involvement in literature is widespread with contributions in various medical and scientific publications. He is also a retired Colonel for the United States Air Force Reserve Medical Corps and is committed to lifelong learning through education, patient care, and community involvement.

Dr. Wergowske is fluent in English and Spanish

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Sean P. Hennessey, MD, FAAFP

Dr. Hennessey graduated from the University of Iowa School of Medicine. He then completed a three year residency on Family Medicine in a University of Iowa program at Polk County Hospital in Des Moines, Iowa. He has been in private practice in Vallejo, California since completing advanced training.

Dr. Hennessey is both a leader and a team player. He has been with Associated Family Physicians since 1985 and was selected by the patients as the 2008 Physician of the Year for Solano County. He is a past president of the Solano County Medical Society and currently serves on the Board of Directors for Hill Physicians Medical Group, one of the top medical groups in California. He also works closely with many other committees to improve physician performance and patient safety.

Dr. Hennessey enjoys the full breadth of Family Medicine, but especially enjoys caring for children and athletes. He is a proud father, husband, and volunteer team physician for Vallejo High School.

Dr. Hennessey is also a passionate San Francisco Giants fan, an avid gardener and a compulsive exerciser.

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Saw Sein, MD, AAFP

Dr. Sein grew up in Southeastern Asia where she attained her medical degree from the University of Medicine in Mandalay, Myanmar in 2005.  After graduating, she practiced medicine for 3 years in Myanmar before arriving in the U.S.  She completed a residency family medicine program at NYU/Lutheran Medical Center in Brooklyn, NY before moving to California.  She began her career here at Associated Family Physicians in August of 2017 and has been well received by her patients.

When not in the office, Saw lives in the East Bay with her husband, Rimmy.  She loves to hike and enjoys traveling to all parts of the world.



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Gregory M. Coe, MD, FAAFP

Gregory M. Coe, M.D. has been practicing with Associated Family Physicians since 1992. He completed medical school at the University of Southern California in Los Angeles and fulfilled his Family Medicine residency at the UCLA affiliated Santa Monica Hospital Medical Center. Dr. Coe has served as the Chief of Staff at Sutter Solano Medical Center for seven years and serves on several committees with Hill Physicians Medical Group. He enjoys helping his patients keep up to date with recommended preventative care and managing chronic conditions like high cholesterol and diabetes.

Dr. Coe enjoys sports and music and is also an avid San Francisco Giants fan. He lives in nearby Benicia with his wife and three children.

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Shelley Wong, FNP

Shelley Wong graduated from UC Davis in 1993 with a degree in Physiology and a minor in English. She worked in a group home for severely emotionally disturbed boys for 4 years before going to nursing school. Shelley worked for 4 years as an RN in the pediatric ICU at UCSF and then graduated with a Master in Nursing, Family Nurse Practitioner degree in 2002 from Samuel Merritt College. She also obtained her Doctor of Nursing Practice in 2016 from Samuel Merritt University.  Mrs. Wong is board certified by the American Nurses Credentialing Center (ANCC)

Her husband is an oral surgeon in Rocklin and they have three beautiful children. She has been working at Associated Family Physicians since 2003 and loves her job and all the great people who work there.

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Ernesto Zambrano, FNP

Ernesto graduated from Sonoma State University with a Master’s of Science degree as a Family Nurse Practitioner in May of 2015.  He began his nurse practitioner career with Associated Family Physicians shortly after in September of 2015.  Previously, he obtained an Associate Degree in Nursing from Solano Community College in May 2011 and worked as a Medical Surgical Nurse for 4 years at the Contra Costa Regional Medical Center in Martinez, CA.  Mr. Zambrano also holds a Bachelor of Science degree in Business Administration from the University of Southern California in Los Angeles.

Ernesto is a longtime resident of the Vallejo area where he attended St. Patrick-St. Vincent High School and graduated in 1992.  He now resides in nearby Benicia with his lovely wife, Sara, and their twin sons, Kai and Aidan.  Outside of work, Ernesto enjoys rooting for our local Bay Area sports teams and playing golf.


English, Spanish, Tagalog, Thai, Burmese, and Mandarin

“Dr. Hennessey has been our family doctor since he came to Vallejo about 28 years ago. I can’t think of a better doctor who has been with us through several major medical issues over the years. If Dr. Hennessey was not available, Dr. Coe is quite capable in all respects. My family has had occasion to have had other members of the medical staff deal with our health issues. All of them have exceeded our expectations for professionalism, concern and follow through. Dr. Hennessey’s nurse, Sherry, is like a family friend and the front office staff is always there to help.

Many of our family, friends and neighbors are also patients of Doctor’s Hennessey and Coe. I recommend this practice highly to all Vallejoans who are looking for a primary doctor.”— Doug K.

Our Staff