Providing Timely and Efficient Reporting Utilizing Evidence Based Principles
Providing Timely and Efficient Reporting Utilizing Evidence Based Principles
Specialty Trained Independent Medical Providers

Specialty Trained Independent Medical Providers

Our panel of providers are fellowship trained in their areas of medical discipline to support the most complex cases.



Our credentialed physicians bring a vast amount of combined experience to appropriately address whole body impairment and permanent work restrictions.

Quality and Timely Reporting

Quality and Timely Reporting

We understand the importance of providing objective and quality reports in a timely fashion to minimize delays in the claims process.

Welcome to Treasure State

Independent Medical Exams

Treasure State Occupational Health independent medical examinations are performed by credentialed physicians with the expertise and know-how to perform an IME resulting in a quality, objective report that helps resolve claims disputes. TSOH providers are independent consultants who are experts in their areas of medical discipline and are committed to providing the highest quality service to our examinees, clients and consulting sources.

We provide objective, well-reasoned medical reports with a quick turnaround time utilizing evidence based principles.

In preparation of exams all relevant medical records and imaging are obtained along with questions that need to be addressed.

Causation Analysis Assessment

Causation is an important factor in workers’ compensation and personal injury cases. It is critically important to determine if problems are causally related to an injury. We accurately assess causation by applying science and current medical knowledge utilizing the AMA Guides to the Evaluation of Disease and Injury Causation, 2nd Edition, the Bradford Hill Criteria and extensive literature research in making these complex determinations.

Causation Analysis Assessments are most helpful done early in the investigational stage of a claim and can be done in the course of a physical examinations or by record review.

Record review evaluations are prepared by our physicians in order to provide an informed expert medical opinion about the appropriateness of care, medical necessity and related issues. Evidence based factors will be used to utilized to address issues such as causal relationship, impairment, functionality, restrictions and limitations, treatment recommendations, appropriateness of medical treatment, severity of diagnosis, and other requested issues.

Impairment Ratings

TSOH will coordinate Impairment Ratings throughout our multiple clinic locations in Montana. An impairment rating evaluation can be performed in conjunction with an IME exam or as a separate evaluation.

We can also provide paper-based evaluations when a physical exam is not possible that provide an expert opinion as it relates to permanent impairment. Often times these are performed when there is a questions about the validity or accuracy of an existing impairment rating.

Our team of physicians have a vast amount of experience and specialized training in providing impairment utilizing the 6th edition of Guides to Permanent Impairment.

Dedicated Staff

Our staff is specialty trained in all aspects of the medical consulting arena to provide consistent and efficient processes to streamline scheduling, appointment coordination and report delivery. We are dedicated to providing local, friendly and knowledgeable service.

The Staff

The Doctors providing Services for TSOH are Independent Contractors

Dr. Joseph Erpelding, M.D. Orthopedics

Joseph Erpelding, M.D., grew up in Great Falls, Montana, and has dedicated more than 20 years to private practice in Billings, Montana. In addition to his private practice, he is an independent medical evaluator for Treasure State Occupational Health. He earned his undergraduate degree from the U.S Military Academy, West Point. He is a graduate of the WAMI program at the University of Washington School of Medicine. He completed his surgical internship and residency at the Madigan Army Medical Center.  Dr. Erpelding retired from the U.S Army as a Lieutenant Colonel. During his 23 years of service he served as the Orthopedic Surgery Residency Program Director, Orthopedic Surgeon for Joint Special Operations Command and remains a member of the U.S Army Flight Surgeon’s Association.

Additionally, he is a recipient of the Chairman of the Joint Chiefs of Staff’s Award for Excellence in Military Medicine/Research and the U.S Army Surgeon General’s Award for Excellence in Medicine. Dr Erpelding has served as the Chief of Orthopedic Department at St. Vincent Healthcare in Billings and as President and Executive Director of the Society of Military Orthopaedic Surgeons as well as the Board of Councilors for the American Academy of Orthopedic Surgeons.

Dr. Donald Ericksen, M.D. Orthopedic Surgeon

Donald Ericksen, MD, is a board-certified orthopedic surgeon who has practiced in Montana for over twenty years. He has provided treatment and surgery for a wide range of orthopedic injuries and conditions. His practice has included sports medicine, joint replacement, fracture care and reconstructions of the knee, shoulder as well as foot and ankle. Dr. Ericksen completed medical school at the University of Washington School of Medicine in Seattle. His post graduate training included an internship in general surgery at Loyola University in Chicago, residency in orthopedic surgery at the University of Washington and an advanced fellowship in foot and ankle surgery at Harborview Medical Center in Seattle.

He works as an independent consultant with Treasure State Occupational Health conducting independent medical examinations, impairment ratings and causation assessments in worker’s compensation and personal injury cases as well as chart reviews.

Dr. Ericksen was born in Kalispell, Montana and then grew up primarily in northwest Washington. In addition to his hospital and clinic-based practice, he has a long history of volunteer coverage of athletic events throughout Montana. Primary non-work adventures include upland bird hunting and flyfishing.

Certification: American Board of Orthopedic Surgery, Fellowship: Harborview Medical Center, Seattle, WA – Foot and Ankle Surgery, Residency: University of Washington Department of Orthopedic Surgery, Medical School: University of Washington School of Medicine

Dr. David J. Hewitt, M.D., M.P.H.,D.A.B.T

Dr. Hewitt is board certified in occupational medicine, general preventative medicine, and toxicology with over 25 years of consulting experience. As an occupational medicine physician he has training and expertise in treating work-related injuries and illnesses, providing case management for facilitation of early return to work for injured workers, and determining work-related impairment ratings. Due to his background as both a private and public health consultant in environmental epidemiology and toxicology, he has unique expertise in assessing health claims related to biological and chemical exposures. Dr. Hewitt provides Independent Medical Examinations, record review and litigation support services regarding multiple issues including musculoskeletal injuries or environmental exposures.

Dr. Albert D. Olszewski, M.D. Orthopedics

Albert Olszewski, M.D.  was born and raised in Great Falls, MT and attended Carroll College followed by the University of Washington School of Medicine and completed his General Surgery and Orthopedic Residency at Wilford Hall Medical Center in San Antonio, TX.  In 1995 he completed a Sports Medicine Fellowship at University of Texas Health Science Center.

Post graduate Dr. Olszewski served in the Air Force and held the positions of  Flight Surgeon, Chief of Flight, Training Officer, Orthopedic Surgeon for Mobile Surgical Field Team and Teaching Chief of Staff for the Department of Orthopedics at Lackland AFB.

Dr. Olszewski has been in private practice as an Orthopedic Surgeon at Flathead Valley Orthopedics for over 20 years. He was a scientific coordinator for the Montana Orthopedic Society and a clinical consultant for Stryker Orthopedics; additionally he has served on the Advisory Board for the Doctors Company. Dr. Olszewski is a healthcare policy expert and advocate.

Dr. Royce G. Pyette, M.D. Sports Medicine

Royce G. Pyette, M.D., graduated from Montana State University before attending the University of Washington Medical School. He completed specialty training at the University of Utah and Family and Preventive Medicine Program where he served as chief resident. He was employed at Bridger Orthopedic and Sports Medicine in Bozeman, Montana, from 2002-2013 where his practice included Sports Medicine, Orthopedic Surgical Assisting, Spinal Care and Occupational Medicine. Dr Pyette has been a U.S Ski and Snowboard Team Physician since 2001 and is the Medical Director for an International Mountain Guiding Company. Dr. Pyette’s current medical practice focus is performing Impairment Ratings and Closing Exams.

Dr. Daniel Rodriguez, M.D. Neurology

Daniel Rodriguez, M.D., is board certified with the American Board of Psychiatry and Neurology. He graduated from the University of Mississippi School of Medicine and the Louisiana State University School of Medicine Residency Program. He completed his fellowship training at the Department of Neurology, Washington School of Medicine in St Louis, Missouri, in Cerebrovascular Disease. He worked as a staff Neurologist at Billings Clinic and is employed as a Staff Neurologist at the Montana VA Health Care System.
Dr. Rodriguez work as an Independent Consultant with Treasure State Occupational Health includes Independent Medical Exams for all types of Neurology cases including traumatic brain injury, nerve trauma and amputations.

Lynne Sinnema Director of Operations


With over 25 years of experience in healthcare, coordination and management experience, Lynne is the Director of Operations of TSOH.  She oversees provider relations, marketing and administrative affairs.

She worked in orthopedics for 20 years prior to joining TSOH and has conducted research projects with Vanderbilt University and Montana State University, as well as serving as medical liaison between MSU and ancillary healthcare services.  She has directed Blue River Trauma Society meetings since 1995.

Lynne feels very blessed to be working with such a great team of providers and colleagues at TSOH. As a third generation Montanan, she enjoys all the outdoor activities Montana has to offer as well as spending time with her grandchildren and traveling.

Brittany Williams Office Manager / Clinical Coordinator


Brittany joined TSOH in 2015 as our Office Manager/Clinical Coordinator. Her attention to detail and exceptional interpersonal skills are a true asset to the TSOH family. Those skills translate into providing professional communication for those with the opportunity to interact with Brittany.

Brittany was born and raised in Missoula and is a proud graduate of the University of Montana. She enjoys summer fun on Flathead Lake, fall football and invigorating walks with her furry four-legged niece.

Jolynn Jones Certified Medical Assistant


Jolynn is a seasoned medical assistant with more than 15 years of experience in Occupational Medicine. She achieves exceptional results in our Billings office.  Jolynn’s infectious smile and positive outlook creates a warm and friendly environment for staff and patients.

Jolynn enjoys traveling, older home restoration, but most of all being with her family and especially with her grandchildren.

Amanda Hawks Administrative Assistant


Facility Locations

Serving the following locations: Billings, Bozeman, Great Falls, Helena, Kalispell, and Missoula

Billings Orthopedic and Sports
2900 12th Avenue North #305E
Billings, MT 59101

4055 Valley Commons Drive, Unit E, Office 1
Bozeman, MT 59718

Great Falls
Cascade Neurological Surgery
401 15th Avenue South, Suite #108
Great Falls, MT 59405

Heuiser Physical Therapy
3336 N. Montana Ave
Helena, MT 59602

Med Work Shop
2427 US Hwy 2 East
Kalispell, MT 59901

7168 Expressway
Missoula, MT 59808

Missoula Records
14924 Hayden Lane
Missoula, MT 59808