Gregory R. Grenier, DO

Billings Downtown

Billings Downtown

2900 12th Ave. N
Suite 140W & 100E
Billings, MT 59101

Hand to Elbow Specialist


Dr. Grenier completed his undergrad studies with a B.A. in Psychology from Sonoma State University.  Following that he earned his medical degree from Kansas City University of Medicine and Bioscience, he graduated Cum Laude.  Dr. Grenier’s medical residency was spent at Ohio University/OhioHealth Doctors’ Hospital Orthopaedic Surgery.  Lastly, Dr. Grenier completed an advanced Fellowship program in Hand, Upper Extremity & Microvascular Surgery at The Hand Center of San Antonio.

Dr. Grenier provides orthopedic care in Billings, MT


Dr. Grenier works with patients that are experiencing the following orthopedic issues:

– Hand injuries

– Carpal tunnel syndrome

– Arthritis

– Tendonitis

– Fractures

– Acute and chronic tendon and nerve injuries

– Wrist injuries

– Arthritis

– Ganglion cysts

– Tendonitis

– Fractures

– TFCC tears and Ulnar sided wrist pain

– Elbow injuries

– Cubital tunnel syndrome

– Arthritis

– Contractures

– Fractures

– Instability

– Lateral epicondylitis (tennis elbow)

– Medial epicondylitis (golfer’s elbow)

– Shoulder injuries

– Rotator cuff tears

– Impingement syndrome

– Arthritis

– Fractures


Dr. Grenier performs the following procedures:

Carpal tunnel release

-Endoscopic & Open

Cubital tunnel release

Arthroplasty and Arthrodesis for finger and thumb arthritis

Repair of flexor and extensor tendon injuries

Repair of nerve injuries

Wrist Arthroscopy

Repair of complex hand, wrist and upper extremity fractures

Shoulder Arthroscopy

Shoulder Arthroplasty


In his off-time Dr. Grenier enjoys any and all activities that will allow his wife and him to get outside and explore together. More recently, they have been enjoying trail running, hiking, cycling, fly fishing and skiing.