Northwest Tucson


Mon-Thur: 7:30am-6pm | Fri: 8am-5pm


8770 N Thornydale Rd Suite 100, Tucson, AZ 85742


(520) 742-7107


(520) 742-9010

Let our highly skilled staff of physical therapists and physical therapy assistants help you get back to the activities you enjoy most. The Northwest staff is passionate about helping their patients feel their best by developing comprehensive and diverse treatment programs specific to your needs. This location is conveniently located near the intersection of Thornydale and Hardy and specializes in the following:

  • Physical Therapy
    • Pre/Post-Surgical Rehabilitation
    • Acute Injury Management
    • Chronic Injury Management
  • Pelvic Floor Physical Therapy
  • Sports Physical Therapy
  • Pediatric Orthopedic Physical Therapy
  • Geriatric Physical Therapy
  • Workers’ Compensation
  • Instrument Assisted Soft Tissue Mobilization
  • Spine Specialty
  • Trigger Point Dry Needling
  • Kinesio Taping
  • Vestibular Therapy
  • Aetna
  • Ameriben
  • American PPO
  • America's Choice Provider Network (ACPN)
  • Ancillary Care Services (ACS)
  • Arizona Foundation for Medical Care
  • Assurant
  • Auto Insurance
  • Banner
  • BCBS Advantage
  • Beech Street Corporation
  • Benesight
  • Blue Cross Blue Shield Plans
  • ChampVA/Champus
  • Cigna (OON)
  • ClarisPointe
  • Equian/HIS
  • Evolutions Healthcare Systems
  • First Health/Conventry
  • Fortified Provider Network (FPN)
  • Freedom Life (PHCS)
  • Fremont
  • Galaxy Health Network
  • Global Medical Management
  • Golden Rule
  • Health Management Network (HMN)
  • Health Net of Arizona HMO/PPO
  • HealthSmart
  • Humana, Inc.
  • Independent Medical Systems
  • Integra Group
  • Integrated Health Plan (IHP)
  • Kemper
  • Liberty Mutual
  • Liens
  • Marriott Arizona
  • MCR Advantage Replacement
  • Medicare
  • Mercy Care/Mercy Care Advantage (AHCCCS)
  • Meritain
  • Mountain Health
  • MultiPlan/BCE
  • MVA
  • National Preferred Provider Network (NPPN)
  • One Consumers Health (AHCCCS)
  • One Health
  • Pacific Care PPO & HMO
  • Prime Health Services
  • Priority Care Solutions (PCS)
  • Private Healthcare Systems (PHCS)
  • Procura Management, Inc.
  • Provider Select, Inc.
  • Rockport Healthcare Group, Inc.
  • Rural AZ Network
  • Secure Horizons
  • The Reny Co.
  • Therapy Direct
  • Three Rivers Provider Network (TRPN)
  • TriCare (All Plans)
  • TriWest
  • UHC Charter
  • UHC Community Plans (AHCCCS)
  • UHC Compass
  • UHC Medicare Solutions
  • UHC Medicare Solutions West
  • UHC Navigate
  • UHC of Arizona
  • UHC Stratose
  • University of Arizona Health Plans
  • United Healthcare
  • USA Managed Care Organization
  • VAPC3 (Veteran's Admin)
  • Zenith

Our Team

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Robert Direnfeld


Education: Northern Arizona University, A.T. Still University

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Bob has over 30 years of experience in orthopedic physical therapy within hospital and private practice settings, including more than 20 years in his own practice. His career route stemmed from his high school wrestling days. After undergoing several PT treatments, Robert knew physical therapy was a career route for him.

An Arizona native, he received his Bachelor of Physical Therapy from Northern Arizona University and a Doctorate in Physical Therapy from Arizona School of Health Sciences at AT Still University. He is active in both the American Physical Therapy Association and the Arizona Physical Therapy Association where he completed a term as president. That work has been personally rewarding for him as well.

When he is not working he enjoys scuba diving and is a huge University of Arizona sports fan. He follows all the teams and goes to football, basketball and baseball games regularly. He also spends quality time with his family, including wife Amy, a registered nurse, and children Layni and David.

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Molly Mikles


Education: Northern Arizona University

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Molly is a pelvic floor therapy expert, and has a unique ability to make it easy for her patients to talk about private and sometimes uncomfortable topics. Through her expertise in pelvic floor therapy, Molly is able to help patients regain basic functions of the human body and watch their confidence and self-esteem return too.

She received her Bachelor of Science in Exercise Science and her Doctorate in Physical Therapy from Northern Arizona University and has spent much of her professional career serving people with orthopedic and sports injuries. She has a Graston Certification to use a patented form of instrument-assisted soft tissue mobilization to direct and treat scar tissue and restrictions that affect normal function.

She has also developed a specialty practice to serve clients who suffer from pelvic floor dysfunction — which she finds particularly rewarding. She enjoys helping patients regain basic functions of the human body and watching their confidence and self-esteem return.
Molly spends her leisure time with her family, riding bikes with her children and sometimes shooting off model rockets.

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Lauren Diegel


Education: Pima Medical Institute

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Lauren is a Tucson native, born and raised. She spent 15 years of coaching competitive gymnastics, where she worked primarily with elementary school children. Lauren has a passion for gymnastics and athletics and enjoys working with people in an active setting, which is what lead her to become a Physical Therapy Assistant. After completing her degree at Pima Medical Institute, she joined the ProActive Physical Therapy team. During her time at ProActive, she’s found her job to be incredibly fulfilling. One of her favorite parts about being a PTA is getting to meet new people every day, and in return, she becomes a small piece of their personal story.

Outside of the clinic, Lauren enjoy spending time with her son Jack.

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Nikki Imhof


Education: Truman State University, Creighton University

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Originally from Missouri, Nikki recently moved to Arizona, and is enjoying the Arizona sunshine. Nikki was drawn to the field of physical therapy at a young age due to love for sports and athletics. She has swam competitively since she was very young and throughout her swimming career has had many different injuries that introduced her to the field of physical therapy. Ever since her first trip to the physical therapist at age 11 she has been in love with field of physical therapy and the career of helping others that has continued to grow over the years and through her PT studies at Creighton University.

The most rewarding part of her job is getting the opportunity to get to know her patients and help them achieve their goals through personalizing their treatment to meet their individual needs. She cares about every patient she works with and believes each person is unique and as such deserves a program as equally as individualized as they are in order to achieve whatever their goals may be. Working with, getting to know, and learning from her patients is what motivates her at work each day.

When not at work, she has loved exploring out west since moving to AZ, from hiking and biking to camping and exploring new things and places with friends and family. When too much Arizona sunshine prevents her from being outside she spends most of her time doing crossfit, training for triathalons, teaching spin classes, doing yoga, or eating mass quantities of ice cream and/or chocolate.