Our Staff

Dr. Johnson's Patient Care Team

If you expect excellent patient care and attentive service, you will enjoy working with Dr. Johnson's team of healthcare professionals. They offer you over 45 years of collective experience in taking care of all types of plastic surgery cases. You can have confidence in each team member that assists Dr. Johnson in the office and in the surgery suite.

Staff Bios

Karen Trenthem, R.N., B.S.N

Karen Trenthem, R.N.,B.S.N

Mrs. Trenthem is a native and lifelong Memphian, who graduated from Evangelical Christian School in 1976. She received her nursing education at The University of Tennessee in Memphis, with a Bachelor of Science in Nursing degree in 1980. She worked at Baptist East Hospital for six years in the Emergency Department before coming to work for Dr.Johnson in 1986.

Karen assists Dr. Johnson in the office and the operating room, and has considerable experience with all aspects of plastic surgery, and is therefore able to answer many questions for you. Many of our female patients enjoy hearing the woman’s perspective on aesthetic surgery from Karen.

Karen is married to Phillip Trenthem, an English teacher in the Germantown Municipal Schools. They have two children, Janie and Emily.

DeeAnn Dossett

DeeAnn Dossett

DeeAnn was born in Salt Lake City, Utah but most of her early years were in Oak Ridge, Tennessee. She began her medical career there, doing volunteer work at Methodist Hospital of Oak Ridge. She took 2 ½ years of pre-nursing courses at Harding University, and has considerable experience in the medical field of a practical nature. She has worked in medical offices of pulmonary, general surgeons, internal medicine specialists, hematologists, allergists, and infectious disease specialists.

DeeAnn worked with Dr. Johnson for 14 years at a former office holding positions as medical receptionist, patient insurance coordinator, and front office manager, A/P manager, administrative assistant, HR manager, and Dr. Johnson’s medical assistant. With her considerable experience in medicine, and especially with over 24 years in plastic surgery, she is able to answer many patient questions. DeeAnn is able to coordinate schedules and can facilitate the process from initial appointment to surgery, to maximize patient convenience.

DeeAnn is married and has four boys and two grandchildren.

"Awesome OR & great staff. No wait." – Amanda

Susan Massa

Susan Massa

The daughter of a Memphis plastic surgeon, Susan has worked in all aspects of a medical office including receptionist, bookkeeper, and patient checkout for over 32 years. She has a great love of plastic surgery and loves to help patients in any way.

She is married and has three children.

Superior Scar Care Technology

At Wolf River Plastic Surgery, we trust bioCorneum® advanced scar treatment to minimize scarring—and even improve old scars. Each of our surgical patients receives a free bottle.

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Ronald J. Johnson, MD, FACS:
Wolf River Plastic Surgery
7910 Wolf River Boulevard
Germantown, TN 38138
Phone: (901) 737-1050

Monday–Friday: 8:30 a.m.–5 p.m.

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Dr. Ronald J. Johnson