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Meet our Team

The Doctors, Nurses and Office Representatives

The Doctor & Providers

Chosen for their knowledge, experience and dedication.

Dr Marek Pienkowski MD

Dr. Pienkowski, M.D., P.h.D.

Founded his medical practice in East Tennessee in 1984. In the prior decade, Dr. Pienkowski honed his research and clinical interests in distinguished institutions such as The Wistar Institute at the University of Pennsylvania, Henry Ford Hospital, and the Johns Hopkins University School of Medicine. When Dr. Pienkowski became ready to set out on his own, he was motivated to practice medicine where people needed him and his colleagues the most.

Curriculum Vitae

Personal Publications


 Wiki Page

Sarah Belcher

Sarah Belcher, FNP-Allergy

Sarah has worked alongside Dr. Pienkowski for seven years and has extensive experience in the field of Allergy, Asthma & Immunology. You will find Sarah working at our Clinics in the Tri-Cities.

Lori Middleton

Lori Middleton, FNP

Lori earned her Bachelor of Science and Master of Science degrees from the University of Tennessee, Knoxville. She is board-certified family nurse practitioner. Before taking a position at Pienkowski, M.D., Clinic, she worked as registered nurse on an ortho/trauma medical surgical unit at UT Medical Center for 5 years and as a nurse practitioner in the pediatric primary care setting for more than 4 years. Lori was born and raised in the Volunteer State, and in her free time with family, she enjoys traveling, camping, and being outdoors. Most of all, she loves spending time with family, especially her husband and two children.

Medical & Administrative Staff



Terri Hughes, CMA
Joye Bussen, LPN
Michelle Collins, CPhT

Administrative :

Kristie Cook, Office Representative
Stephanie Spears, Office Representative
Blake Huggins, Practice Administrator



Darlene Lowe, LPN
Mary Ann Walsh, LPN

Administrative :

Kathy Chase, Office Representative



Heather Horton, LPN

Administrative :

Samantha Lee, Office Representative

Johnson City


Sabrina Ellis, LPN
Amy Morton, LPN

Administrative :

Debbie Clabough, Office Representative



Heather Mullikin, LPN

Administrative :

Heather Walsh, Office Representative

Proudly Affiliated

We have longstanding relationships and support these fine healthcare institutions: