Mason Clinic - Orthopedics

Mason Clinic Orthopedics provides high-quality and complete general community level care services.

  • Mon-Fri: 7:30 am to 5 pm
  • Closed Sunday and all major holidays

About Orthopedic Services

In addition to general orthopedic medicine, Mason Clinic offers specialized care for sports medicine injuries, conditions of the ankle, hip, knee and shoulder, as well as joint replacement surgeries. Our physicians also provide treatments for osteoarthritis and fractures.

Arriving on time for your scheduled appointment is important in addressing your health care needs. Please notify Mason Health as soon as you know you will need to change or cancel your appointment. You are required to cancel your appointment at least one business day prior to your scheduled appointment because of high patient demands. Your ability to schedule future appointments will change because of missed appointments or cancellations.

If you have questions about our No-Show and Cancellation policy, please call the clinic or download a copy of the No-Show and Cancellation Policy as indicated below.

Partnership with Olympia Orthopaedic Associates

Mason Health is proud to partner with providers from Olympia Orthopaedic Associates! OOA providers Dr. Justin Anderson, MD, Terri Grosshans, PA-C and Katie Pauley, ARNP, see patients at Mason Clinic, along with Mason Health's own Charles Anderegg, PA-C.

The following providers perform orthopedic surgery at Mason General Hospital:

Learn more about these providers by checking out their biographies, listed in the downloads below, or click their names. You can also search their names through our Find a Provider link.

Commonly Performed Procedures

  • Ligament reconstruction of the knee including anterior ACL reconstruction
  • Cartilage preservation surgery
  • Meniscus repairs and meniscectomies (removal of damaged knee cartilage)
  • Total hip, knee and shoulder replacement
  • Partial knee replacement
  • Rotator cuff repair and instability treatment
  • Arthroscopy of the knee and shoulder
  • Adult and child fracture care
  • Soft tissue injury

Clinic Providers

Charles W Anderegg, PA-C
Orthopedic Surgery

He is an APC (Advanced Practice Clinician) in orthopedics, providing orthopedic services for Mason Health.

Justin Anderson, MD
Orthopedic Surgery

Dr. Justin Anderson was born and raised in Monmouth Beach, NJ, and joined the team at Olympia Orthopaedic Associates in the fall of 2023. Dr. Anderson will be focusing on general orthopaedics and seeing patients at the Westside Clinic and at Mason Clinic in Shelton.

Bradley C. Christ, MD
Orthopedic Surgery

Dr. Christ is an Olympia Orthopaedic Associates provider. With extensive training in the latest advances in sports medicine, Dr. Christ diagnoses and treats a variety of sports-related and traumatic conditions and injuries of the ankle, hip, knee and shoulder. He performs orthopedic surgeries at Mason Health.

Terri Grosshans, PA-C

Terri Grosshans is an Olympia Orthopaedic Associates provider who holds a Master of Clinical Health Services from the University of Washington MEDEX program and a Bachelor of Science in Health Science from Kaplan University. She has extensive experience in orthopedics in surgical and non-surgical settings. She has clinic hours at Mason Clinic.

Ryan Halpin, MD

Dr. Halpin is an Olympia Orthopaedic Associates provider who is board-certified in neurological surgery and has advanced training in complex spinal deformity and minimally invasive spine surgery. He performs surgery at Mason General Hospital.

Richard J. Lamour, MD
Orthopedic Surgery

Dr. Lamour is an Olympia Orthopaedic Associates provider who performs surgery at Mason General Hospital. As a dual-fellowship-trained, board-certified orthopaedic surgeon, Dr. Lamour specializes in minimally invasive and non-surgical treatment of sports-related injuries of the knee, foot and ankle.

Andrew Manista, MD
Orthopedic Surgery

Dr. Manista is an Olympia Orthopaedic Associates provider who performs surgery at Mason General Hospital. is a fellowship-trained and board-certified surgeon who specializes in complex surgery of the spine using the most advanced evidence-based methods and techniques.

Katie Pauley, ARNP

Katie joined Olympia Orthopaedics in 2021 after completing the Master of Nursing, Family Nurse Practitioner program at Bradley University. Starting in 2022, she will be working at Mason Clinic with Dr. Ryan Halpin, MD.

Darrin J. Trask, MD
Orthopedic Surgery

Dr. Halpin is an Olympia Orthopaedic Associates provider who performs surgery at Mason General Hospital. As a fellowship-trained orthopaedic surgeon specializing in hip and knee care, Dr. Trask has extensive training and experience in the treatment and diagnosis of conditions of the knee and hip.

Ross E. Vogelgesang, MD

Joined Mason Health's team in June 2021 to provide pain management service across the District to all service lines! Dr. Vogelgesang obtained his medical degree at University of Texas Medical School at San Antonio, 1988. He specializes in chronic and acute pain management services for the entire District. Please contact your provider for a referral.

Jerome Zechmann, MD
Orthopedic Surgery

Dr. Zechmann is an Olympia Orthopaedic Associates provider who performs surgery at Mason General Hospital. His expertise covers many orthopaedic sub-specialties including total joint replacement, sports injuries, and fractures.

Frequently Asked Questions