Meet Our Providers

Timothy S. Johnston, MD
Specialty Family Practice

Dr. Johnston first received a Pharm D. from UCSF, taught pharmacy school at the University of New Mexico, received his MD from UNM, and then came for his residency in Merced in 1985.

Dr. Johnston especially enjoys prenatal care and delivery. He has held privileges at Valley Children’s Hospital for more than 25 years. He is a certified clinical densitometrist and is Medical Director at Grace Home in Livingston, Anberry in Atwater and Anberry Transitional Care in Merced.

Dr. Johnston enjoys watching his grandchildren play baseball, basketball and volleyball. He is the team doctor for Stone Ridge Christian High School. In his spare time, he works.

Timothy S. Johnston, MD

Lynda Scales, FNP
Family Medicine

Lynda started as an OB nurse in LA and then moved to Merced. She expanded her nursing to be an instructor for the LVN program at Merced College. She increased her learning to achieve her Family Nurse Practitioner degree and certification, along with obtaining her Master’s degree in Nursing.

She enjoys educating patients, disease prevention, and health maintenance.

Lynda is an integral part of our Obstetrics care in the office. Part of her time in clinic is spent working alongside Dr. Johnston caring for our pregnant mothers.

Lynda Scales, FNP

Man-Siak Mak, MD, AGAF, FACG
Gastroenterologist

Dr. Mak attended medical school at National Defense Medical Center in Taipei, Taiwan. He is Board Certified in Internal Medicine and Gastroenterology. He completed his internship and fellowship in the state of New York. He began practicing medicine in Merced County in 1977. He is a Fellow of the American Gastroenterology Association as well as the American College of Gastroenterology. He is also a member of the American Society of Gastro-Intestinal Endoscopy as well as the American College of Physicians.

Dr. Mak recently closed his private practice of 41 years and will be working part-time in our office. He will continue with his procedures at University Surgery Center, continuing his passion of taking care of patients in the valley.

In his spare time he enjoys reading and walking.

Man-Siak Mak, MD, AGAF, FACG

Larry Traylor, FNP/PA
Family Medicine

I’m waiting for my bio.

Larry Traylor, FNP/PA

Ken Miller, PA
Family Medicine, Urgent Care

Ken Miller has been a Physician’s Assistant for over 44 years. He graduated from the PA program at Stanford University after 4 years as a corpsman in the United States Coast Guard. Ken has practiced in Merced at various clinics. He retired in 2017 from regular practice as a PA and now focuses his clinic time with Urgent Care related illnesses.
His outside interests include golfing, traveling with his wife and friends, attending his grandchildren’s activities, and singing. He is a member of First Baptist Church of Winton.

Ken Miller, PA

Sharon Brown, PNP
Healthcare Practitioner

I’m waiting for my bio.

Sharon Brown, PNP

Chris Clark, PGY 3
Healthcare Practitioner

Chris Clark is a father of three with a passion for pediatric primary care. He has strong roots in the central valley, and was attracted to pediatrics because of the potential to help families through the health of children.
As an older resident, he has varied experiences. Born in New Jersey, he has lived all over the country. He served in the US Navy from 93-97, and has been in California essentially since 1993. He considers himself a Californian now. He completed his BS in Cell and Molecular Biology from UC Merced in 2014, and his medical degree from UC Davis School of Medicine in 2018.
Personal interests include music, reading, and technology. He has a passion for symphony orchestra. As a trombone player, he has been a member of several community orchestras over the years. He also loves to read, and is a huge fan of classic science-fiction. His technical curiosity extends to tinkering with technology and video editing.
He is passionate about returning to Merced as a primary care outpatient pediatrician. When working with the challenges patients and their families face, he always endeavors to, “step into their world rather than try to pull them into mine.”

Chris Clark, PGY 3

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