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Karin Smith

Operations Manager

Karin has worked in Office Administration in varying offices in Germany and Killeen and enjoys the interaction with the patients. She loves seeing patients become pain-free and more mobile with the help of their Physical Therapist(s). Karin is fluent in German and enjoys visiting her home town in Frankfurt. As Operations Manager, she keeps the clinic running smoothly, runs our clinic audits, and maintains the clinic inventory. Karin has attended workshops and seminars to help patients understand their insurance benefits. She has also attended the Web PT Conference in Washington, D.C. that has given her expertise in the EMR system utilized by Bellah Therapies. She has lived in Killeen for 16 years with her husband, who is a retired Army Veteran. In her spare time, Karin loves traveling, cooking, and playing with her new puppy, Joey.


Dr. Isabel Northington

PT, DPT, Cert. DN, Cert. SMT, C/NDT
Diploma in Osteopractic
CEO / Physical Therapy Director

Dr. Mackenzie Mayo

Physical Therapy Director


Dr. Peggie Williamson

PT, DPT, Cert. DN, Pelvic Floor
Physical Therapist

Dr. Jonathan Sowell

PT, DPT, Cert. DN
Physical Therapist

Dr. Brian Vogt

PT, DPT, Cert. DN
Physical Therapist

Dr. Glenn Fontenelle

PT, DPT, Cert. DN
Physical Therapist

Dr. Kennedi Henneberger

Physical Therapist

RJ Hibbard

Physical Therapist Assistant


Sarah Moll

Administrative Assistant