Michael B. Purnell, M.D., FAAOS - Orthopedic Surgeon


American Board Of Orthopaedic Sugery Badge Image
  • Sports Medicine (Knee & Shoulder)
  • Arthroscopic Surgery (Knee & Shoulder)
  • Knee (ACL, Meniscus, Cartilage Restoration, Patellofemoral Disorders)
  • Knee Replacement (Total Knee, Partial Knee, Patellofemoral Arthroplasty)
  • Shoulder (Rotator Cuff, Instability, Dislocation)
  • Shoulder Replacement (Total Shoulder, Partial Shoulder, Reverse Shoulder)
  • Treatment of Irreparable Rotator Cuff Tears
  • Regenerative Medicine (Biological and Non-Surgical Treatment Alternatives for Arthritis & Tendinitis)
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Dr. Purnell completed his Doctor of Medicine from the University of Iowa College of Medicine in 1983 and a residency in Orthopedic Surgery from Boston University Affiliated Hospitals Program in 1988. He followed that up with the internationally acclaimed AO Fellowship in Munich, Germany for advanced orthopedic techniques and a Sports Fellowship from North Sydney Orthopedic and Sports Medicine Centre, New South Wales, Australia. He set up his private practice with the OrthoMed Center in Modesto in 1989.

With more than 30 years in his chosen field, Dr. Purnell is a renowned orthopedic surgeon who sits on the surgical advisory board of various organizations and participates in the design and development of knee and shoulder prostheses, as well as sports medicine devices. Known for his focus on shoulder and knee conditions along with his passion for Sports Medicine, Dr. Purnell also has the distinction of having a design patent to his name--The Beach Chair Lateral Traction device. This device is an apparatus for positioning a human arm in space for arthroscopic shoulder surgery.

Dr. Purnell is trusted by multiple college sports teams for his knowledge and experience with sports medicine and founded Sports Medicine Modesto - a non-profit athletic training program and educational foundation in Modesto, California.

Dr. Purnell is also listed in Becker's 25 Knee Surgeons to Know, highlighting his clinical practice expertise in Sports Medicine with a focus on the knee and shoulder. Additionally, Dr. Purnell is one of only 2500 orthopedic surgeons in the country, and the only one in Stanislaus County to have earned the distinguished certificate of Added Qualification in Sports Medicine from the American Academy of Orthopedic Surgeons. 

Appointment Location

Modesto, California

Education and Training

Bachelor of Arts in Anthropology
Northwestern University
Evanston, Illinois

Medical School:
Doctor of Medicine
University of Iowa College of Medicine
Iowa City, Iowa

Transitional Internship
Evanston Hospital
Northwestern University
Evanston, Illinois

Orthopedic Surgery Residency
Boston University Affiliated Hospitals Program
Boston, MA

Sports Medicine Fellowship
North Sydney Orthopedic and Sports Medicine Centre
New South Wales, Australia
AO Fellowship (Internal Fixation)
Munich, Germany

Diplomate, American Board of Orthopaedic Surgery
Certificate of Added Qualification, Sports Medicine


Doctors Medical Center, Modesto, CA
Stanislaus Surgical Hospital, Modesto, CA
Memorial Medical Center, Modesto, CA

OrthoMed Center, Private Practice
Modesto, CA

Founder, Sports Medicine Modesto
Non-Profit Athletic Training Program and Education Foundation
Modesto, CA

Surgical Advisory Board, Shoulder Innovations
Surgical Advisory Board, Conventus
Surgical Advisory Board, Pacific Medical, Inc.
Clinical Consultant, Arthrex
Orthopedic Consultant, Central West Ballet
Editorial Review Staff, American Journal of Sports Medicine

Academic Appointment:
Faculty Member
Valley Consortium for Medical Education
Valley Orthopedic Surgery Residency
Modesto, CA

The Beach Chair Lateral Traction Device
Compositional Patent for Topical Antimicrobial Cream

Team Physician:
California State University Stanislaus
Seattle Mariners - "Modesto Affiliate"
Head Team Physician, Modesto Junior College

Board of Directors:
Board of Councilors, AAOS
Stanislaus Surgical Hospital
California Orthopedic Association

Fellow, American Academy of Orthopedic Surgery
Member, American Orthopedic Society for Sports Medicine
Member, Biologics Association
Member, California Medical Association
Member, California Orthopedic Association
President, California Orthopedic Foundation
Member, Stanislaus Medical Society

1335 Coffee Road Suite #101
Modesto, CA 95355

Phone: (209) 524-4438

Monday through Friday
8:00 am - 5:00 pm

About Us
OrthoMed Center aims to be the preferred provider of high-quality musculoskeletal care to the people of Modesto. We provide cutting-edge medical care while also ensuring we treat patients and their families with the utmost compassion as they find their way back to good health.
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