Doctor Bios

151020_003-3 Low Res retouch whiten teethThomas D. Loomis, M.D.

Dr. Loomis is a Board Certified family physician who has been active in primary care since 2014 in the Petoskey/Harbor Springs area of northern Michigan. He received his bachelor of arts degree from Anderson University in Indiana and his medical degree from the University of Michigan. He completed his internship in general surgery at the Medical College of Wisconsin. He then went on to complete his residency in family practice at St. Michael’s Hospital in Milwaukee.

He enjoys spending time with his family, skiing in both Michigan and in the western mountains.  He makes his home in Petoskey with his wife, Valorie, and their children.


151020_015 Low Res retouch whiten teeth reduc rednessWendy H. Walker, M.D.

Dr. Walker is a Board Certified family physician who has been active in primary care since 1996 in the Petoskey and Harbor Springs area. She attended the University of Michigan as an undergraduate and then went on to medical school at Michigan State University College of Human Medicine as part of their rural health program, completing her clinical training in Michigan’s Upper Peninsula. She completed her residency in family practice at Mid Michigan Regional Hospital in Midland, Michigan.

Dr. Walker served for 10 years on the Northern Michigan Regional Hospital board of trustees and is currently a member of two Boards to help shape the future of healthcare. In 2017 she opened a wellness division of LTPC called MDVIP (Medical Doctor Value in Prevention) which focuses on personalized healthcare and wellness and disease prevention. 


Marcin Jankowski, D.O.

Dr. Jankowski is a family physician who has been active in primary care in the Petoskey/Harbor Springs since 2004. He attended Michigan State University for his undergraduate degree in physiology. He is a 1999 graduate of Michigan State University College of Osteopathic Medicine. His internship and residency training took place at Mercy General Health Partners in Muskegon, Michigan.

Dr. Jankowski is Board Certified in family medicine and osteopathic manipulative treatment. He is supported by his wife and son. He focuses on the entire person, providing comprehensive, thorough and evidence-based health care for his patients.



151022_014 Low Res crop 2 retouch whiten teeth sharpen eyesMark Drogowski, M.D.

Dr. Drogowski, or “Dr. Mark” as often called by patients, is a family physician who has been serving Northern Michigan since 1990. He specializes in preventive care and care of the entire family, from newborns to grandparents. He attended Albion College as an undergraduate and then went on to medical school at Wayne State University in Detroit. He completed his family medicine residency through the Saginaw Cooperative Hospitals in 1989, where he served as chief resident and president of the Michigan Academy of Family Physician Resident Section. It was there that he received an award as one of the top 25 residents in the country.

Dr. Drogowski is Board Certified by the American Board of Family Medicine. He has also served in multiple positions as part of Cheboygan Memorial Hospital’s medical staff, including chief of staff and chair of credentialing. He actively volunteers at the Northern Care Free Clinic and participates in mission trips and community speaking. Dr. Mark enjoys teaching and has served as a clinical instructor for medical students from five Michigan medical schools, and for students from several NP and PA programs and premedical colleges.

Most important to him are his wife Ann-Laurie and their three sons, Matt, Mike and Dave. When not working, he enjoys the outdoors and bow hunting.


Sara L. Rivette, M.D.

Dr. Rivette is Board Certified in Internal Medicine. She has been practicing for over 25 years in Saginaw, Michigan and recently relocated to Northern Michigan to continue her practice. Dr. Rivette completed her undergraduate education at Michigan State University and attended Michigan State University College of Human Medicine for medical school. She did her Internal Medicine Residency at George Washington University Hospital in Washington DC.

She is married with 2 grown sons and enjoys traveling, reading and exploring her new home in Northern Michigan.



Sarah K. Woiderski, D.O.

Dr. Woiderski is a Board Certified internal medicine physician specializing in those aged 18 and older. She is originally from “Up North”, growing up in Cheboygan. She attended Michigan State University where she obtained her Bachelor of Science degree. She then received her medical degree at Michigan State College of Osteopathic Medicine. She completed her internal medicine residency at Detroit Medical Center Huron Valley-Sinai Hospital in Commerce, MI, where she served as chief resident.

Dr. Woiderski is excited to be back in Northern Michigan.  She enjoys spending time with her family, paddle boarding, and traveling, particularly to Africa.


151020_019 Low Res retouch skin smooth sharpen eyesRita Balistreri, MSN, FNP-BC

Rita Balistreri is an ANCC Board Certified family nurse practitioner with previous clinical experience in intensive care, pediatric intensive care and emergency medicine. She completed her undergraduate work at Pensacola Christian College in Pensacola, FL and her master’s degree at the University of South Alabama. During her clinical education, she has worked in partnership with doctors of multiple specialties, such as pediatrics, orthopedics, internal medicine and family practice.

When Rita is not working, she enjoys spending time with her husband and daughters, skiing, boating and reading.



151020_006 Low Res 2 Crop retouch skin smooth sharpen eyesEmilee Kennedy, MSN, ANP-BC

Emilee Kennedy is an ANCC Board Certified adult nurse practitioner, with previous clinical experience in medical oncology. She completed her undergraduate work at North Central Michigan College and University of Michigan and her master’s degree at Michigan State University. During her clinical education, she has worked in partnership with doctors that specialized in family practice and internal medicine.

When Emilee is not working, she enjoys spending time with her husband Eric, their three sons and chocolate lab, Nola. She also enjoys reading and spending time with her family and friends.



151020_027 Low Res retouch teeth whiten thin skin smooth ret sweaterKim Clark, MSN, FNP-BC

Kim Clark is an ANCC Board Certified Family Nurse Practitioner, specializing in family practice and women’s health. Kim’s clinical experience includes adolescent health, acute rehabilitation, medical surgical nursing, homecare and hospice. She completed her master’s degree at Saginaw Valley State University and nursing degree at Kirtland Community College. Kim is the President of the Northwest Chapter of the Michigan Council of Nurse Practitioners.

Kim lives in Harbor Springs and when she is not working she enjoys spending time with her family, friends and her dog, Scout. Kim is active in her church and enjoys spending time outdoors, gardening, kayaking and hiking,


Kaitlin Klingshirn, PA-C

Kaitlin Klingshirn, PA-C, is a board-certified Physician Assistant. She received her B.S. degree in Integrative Physiology and Health Science from Alma College and her Master’s Degree from Central Michigan University.  During her clinical education she worked with doctors in multiple specialties, including family medicine, pediatrics, women’s health, and internal medicine. Kaitlin manages acute and chronic care needs, and does a variety of procedures, including joint injections, and small office surgeries.

When not at the office, Kaitlin enjoys spending time outside. She can often be found on the water with her husband, Andrew, or out for a walk with her dogs, Remmy and Oakley.


Kristy Paterson, LMFT

Kristy Paterson is a Licensed Marriage and Family Therapist and Certified Yoga Instructor who has been active in the health and wellness industry since 2010 in California’s central coast. She attended Chapman University as an undergraduate and went on to earn a Master’s degree in Psychology from California Polytechnic State University. During this time, she traveled to many countries around the globe while learning about their native wellness practices, healthcare systems, and beliefs and values towards well-being. While completing her clinical training, she delivered over 3,000 hours of behavioral health services to individuals, couples, families, and children. She also taught classes and offered interactive workshops on mindfulness-based practices, nutritional healing, and balanced-living principles.

For Kristy, life is about living simply- a home cooked meal, a meaningful conversation, a visit to the farmers market, a campfire with friends and family, or a peaceful walk in the woods. She feels blessed to now be living in Northern Michigan with her husband, closer to her extended family.

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