Primary Care

Primary Care Providers include family practice physicians, internal medicine physicians, pediatricians, nurse practitioners and physician assistants. These providers manage the care of each patient by providing regular exams and screenings, treating chronic and acute illnesses and coordinating additional care for their patients. And many of our primary care providers now offer the added convenience of online scheduling.

Rural Health Primary Care is now accepting new patients with Medicare or Medi-Cal insurance.

Call 209-536-5100 or book online:

Bethany Bick
Book Online

Bethany Bick, NP, treats patients at Rural Health Primary Care. Bethany has many years of experience in family medicine and wound care settings. She treats patients of all ages, making her an excellent resource for the entire family.
Growing up with a parent in the healthcare field, Bethany aspired to practice medicine at a young age. She has always felt a calling to care for patients and become a healer.
Bethany joins Adventist Health Sonora after growing up in Murphys, California. In her spare time, she enjoys gardening, sculpting, drawing and spending time outdoors with her family. Appointments can be booked online or by calling 209-536-5100.

Timothy Day
Book Online

Timothy Day, PA-C is a board-certified physician assistant who plays a dual role, providing both orthopedic and primary care services. He works collaboratively with all of his patients to help them achieve their goals in a supportive, attentive environment. Primary care patients will find a full range of services for children and adults. Timothy provides wellness visits, sick visits, sports physicals, immunizations, and management of chronic illnesses and pain. Patients with Medicare or Medi-Cal insurance can schedule a primary care appointment online or by calling Rural Health Primary Care at 209-536-5100. For patients in need of orthopedic care, please see our Specialty Care page for office location information.

Kathryn Walker
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Kathryn Walker, FNP, is focused on providing comprehensive primary care for patients age 2 and older including annual well visits, diagnosis and treatment for acute illnesses, management for chronic conditions such as hypertension and diabetes, and special care for patients with depression, anxiety and addiction. “I have always been fascinated by the human body,” Walker explains. “I love helping others find happiness in their lives by experiencing good health and having energy to participate in the activities they enjoy."

Walker provides care exclusively using telehealth technology. Her patients visit the primary care office where a medical assistant checks vital signs such as blood pressure and temperature. Walker joins via video in the patient’s room to discuss health concerns and care plans. Appointments can be booked online or by calling 209-536-5100.

Groveland Family Medical Office is now accepting new patients and walk-in appointments for urgent needs are available.

Call 209-962-7121 or book online:

Steve Shield
Book Online

Steven Shield, MD, is board certified in Family Medicine and has been caring for our community at Groveland Family Medical Office since 1993. He provides comprehensive primary care for the whole family, seeing patients age 2 and older for wellness exams, chronic disease management and diagnosis, treatment for acute illnesses and behavioral health care. Dr. Shield graduated from Loma Linda University School of Medicine and spent one year in a pathology residency followed by a three-year Family Medicine residency, also at Loma Linda. He briefly served as an attending physician in the Loma Linda Family Medicine program before moving to Tuolumne County. Appointments can be booked online or by calling 209-962-7121.

Michael Layton
Book Online

Michael Layton, PA-C, focuses on caring for adults by providing general medical care but also sees adults and children for urgent needs. Layton is interested in helping his patients with more complex medical issues to manage their chronic conditions. Layton holds both a Master of Science in Physician Assistant Studies from Stony Brook University, in Stony Brook, N.Y., as well as a Doctor of Chiropractic from University of Western States, in Portland, Ore. “After practicing chiropractic for seven years, I decided to complement my background with general medicine to focus on caring for the whole patient,” Layton explains. Appointments can be booked online or by calling 209-962-7121.

If you would like assistance finding a primary care provider, call our physician referral line at (209) 536-3344 or Request an Appointment.

Adventist Health Sonora offers comprehensive health services for the whole family. Our primary care medical office locations are listed below:

Primary Care

Adult Medicine
690 Guzzi Lane, Suite C&D, Sonora
209 -536-3820
Internal Medicine: Jason Jeffery, MD | Reiker Schultz, MD | Kyi Kyi Win, MD | Andrew Lo, MD | Carolee Ross, NP
Angels Camp Family Medical Office
445 S. Main Street, Angels Camp
Family Practice: Sandra Shetzline, DO | Kelsey Belcourt, NP
Cardiology: Eric Hemminger, MD | Rajiv Maraj, MD
Endocrinology: Donald Westbie, MD
General Surgery: Peter Oliver, MD
Arnold Family Medical Office
2037 Highway 4, Arnold
Family Practice: Jeremiah Fillo, MD | Dolly Jacobs, NP
Cedarwood Internal Medicine
690 Guzzi Lane, Suite A, Sonora
Internal Medicine: J. Frederick Shield, MD | Lisa Andrews, NP
Foothill Pediatrics
12791 Cabezut Road, Sonora
Pediatrics: Kelley George, MD | Sheila Ponzio, MD | Timothy Sullivan, MD
Greenley Primary Care
19747 Greenley Road, Sonora
Family Practice: Mathea Salas, DO
Groveland Family Medical Office
18661 Highway 120, Groveland
Family Practice: Steven Shield, MD | Michael Layton, PA-C
Health Pavilion Primary Care
900 Mono Way, Sonora
Family Practice: Ryan Carey, DO | Michael Portillo, MD | Cindy Thomas, NP
Internal Medicine: Claudia Smith, NP
Sierra Internal Medicine
680 Guzzi Lane, Sonora
Endocrinology: Donald Westbie, MD
Internal Medicine: Nancy Kerr-Schifrin, NP

Rural Health Care Services

Adventist Health Sonora Rural Health
193 S. Fairview Lane, Sonora

  • Dental Care, Suite J, 209-536-5140
  • Pediatric Care, Suite L, 209-536-5120
  • Primary Care, Suite B, 209-536-5100
  • Specialty Care, Suite C, 209-536-5135
    • Dermatology, Ear Nose and Throat, Endocrinology, Gastroenterology, General Surgery, Orthopedics, Pain Management, Physical Medicine and Rehabilitation, Podiatry, Psychiatry
  • Specialty Care, Suite F, 209-536-5110
    • Obstetrics and Gynecology
  • Behavioral Health, Suite K, 209-536-5144


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