» Team


Dr. Mallory Hertz

Dr. Mallory is originally from Sibley, Iowa. She attended the University of South Dakota in Vermillion where she majored in chemistry with minors in interdisciplinary sciences and mathematics. She then continued her education at the Mayo Clinic in Rochester, Minnesota. She graduated at the top of her class with her Doctorate in Physical Therapy in 2014. She began working full-time in a hospital-based out-patient clinic where she saw patients with a variety of conditions. In 2016, she relocated to FYZICAL in Dakota Dunes  focusing on treatment of patients in the areas of balance/vestibular and pelvic health. In 2018, she transitioned to a full-time pelvic health caseload. Mallory is level 3 pelvic certified. She enjoys treating her patients in these specialty areas and serving the FYZICAL team as director.

Dr. Sarah Sitzmann-Ruehle

Dr. Sarah was born and raised in Sioux City, Iowa, and is a proud Heelan Crusader. She attended Drake University in Des Moines where she received her Bachelors of Arts in Biology. She continued her education  locally at Briar Cliff University in the charter class of the physical therapy program. She graduated with her Doctorate in Physical Therapy in 2018. She then began working full-time at FYZICAL specializing in the treatment of patients with vestibular and balance deficits. She has her Level I, II, and III vestibular certification. Dr. Sarah is proud to serve her hometown community with the best technology, education, and care!

Dr. Leah Noel

Dr. Leah is  a Sioux City native and Heelan grad. She went to Briar Cliff University and received her Bachelors of Arts in biology with a minor in psychology. She continued her education through Briar Cliff to earn her Doctorate in Physical Therapy in 2022. She is specializes in the treatment of patients with vestibular/balance and pelvic health disorders. Leah is a level 3 pelvic certified therapist. In her free time, she enjoys spending time with her husband, daughter, and other family/friends. Leah is excited to serve Siouxland with one-on-one, specialized physical therapy care!

Dr. Samantha Protexter

Samantha (Sam) is the newest member of the FYZICAL team. She was born and raised in Sioux City, Iowa, where she graduated from East High School. She attended Morningside University where she received her Bachelor of Arts in Chemistry and Bachelor of Science in Biology with minors in mathematics and psychology. Sam obtained her Doctor of Physical Therapy Degree from Briar Cliff University in 2023. As a Doctor of Physical Therapy student, Sam took a keen interest in vestibular rehabilitation when she practiced at FYZICAL for eight weeks during a clinical rotation. As a result, she is excited to start her career specializing in vestibular rehabilitation and continue to expand her knowledge of the various vestibular diagnoses. Sam also specializes in general imbalance and orthopedic conditions. Outside of work, Sam enjoys spending time with her friends and family, running, playing soccer, baking and decorating sugar cookies, and antique shopping. She is eager to utilize her continually growing skillset to positively impact patients’ lives in the Siouxland area.

Krissi Milton

Kristiana (Krissi) is originally from and currently resides in Hinton, Iowa. She received her associate’s degree in Certified Personal Training in 2015 from Western Iowa Tech. Krissi’s passion for the PT profession came after an ATV accident where she injured her wrist and went through several months of physical therapy. The experience inspired her to go back to school to become a Physical Therapist Assistant. Since joining the FYZICAL team after graduation in 2016, Krissi has become specialized in the treatment of patients with dizziness and imbalance. She also performs all VNG testing. Krissi is known for her caring attitude, contagious laugh, and ability to make patients feel comfortable. She takes pride in ensuring the patient has a good experience during the course of their treatment.

Missie Kleinschmidt

Missie is a Sioux City native. She joined Ear Nose and Throat Consultants in 2017 as a receptionist. She expanded her role to Client Care Specialist at FYZICAL in January of 2022. She is a vital part of managing referrals, schedules and keeping the team moving forward. In her free time, Missie enjoys spending time with her family and pets.  She and her husband (Chris), have two sons, Remington and Keegan, which keep them very busy.