Clinics: Specialty clinic

CMH Specialty Group provides services in orthopedic surgery, urology and general surgery. We provide services to our patients in a local community setting with experts in these fields.

Consultations between providers are readily available to offer our patients immediate attention to their medical questions and concerns. Please see the information below that details the specialty and medical interest of each provider within the CMH Specialty Group.

Dr. Lacost

William C. LaCost, DO

Dr. LaCost's specialty is orthopedic surgery including arthroscopy, carpal tunnel surgery, fracture management, total joints, sports medicine and rotator cuff surgery. Dr. LaCost attended medical school at the Chicago College of Osteopathic Medicine. He is board-certified by the American Board of Osteopathic Medicine and completed his internship at Eastmoreland General Hospital in Portland, Oregon. He completed his residency at Millcreek Community Hospital in Erie, PA.

Dr. Larsen

Ryan L. Larsen, PA-C

Ryan Larsen is the physician assistant to Dr. LaCost. He is certified by the National Commission on Certification of Physician Assistants. He received his education through Quinnipiac University, in Hamden Conn. His specialty is Orthopedics. He is a member of the American Academy of Physician Assistants.

Dr. Leibel

David P. Leibel, DO

Dr. Leibel specializes in urology. He is board-certified though the American Board of Osteopathic Surgery—Urology. He attended medical school at Des Moines University in Iowa. He did his internship at Normandy Osteopathic Hospitals and his residency at University of Medicine and Dentistry of New Jersey. Additional specialties and medical interest include minimally invasive surgery, pediatric urology, urogynecology, urology, urology/oncology and urology surgery. He is a member of several osteopathic and urological associations.

Dr. Crass

Richard Crass, MD

Dr. Crass attended medical school at Temple University School of Medicine and completed his internship and residency at the University of California, San Francisco. He specializes in general surgery.

Dr. Duret

Edouard Duret, MD

Dr. Duret is board-certified by the American Board of Surgery. He attended medical school at the State University of Haiti and completed residency at the University of Illinois Mount Sinai Hospital Chicago, Illinois. His specialties include general surgery, laparoscopic surgery and minimally invasive surgery. He also had numerous additional specialties, among them breast cyst aspiration, colon resection, lump and bump removal and mastectomy.


2265 Exchange St.

Astoria, OR 97103

Phone: 503-338-4075


Office Days and Hours: Monday through Friday, 9 a.m. to 5 p.m.

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