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Photo of D. David Ernst, D.O. (Emeritus)

Insurances Accepted

Accepts all major forms of insurance. Please contact the office at (810) 985-4900 to verify your specific carrier.

Joint Replacement Surgeon

A native of Richmond, Michigan, Dr. Ernst is an orthopedic surgeon who specializes in joint replacement surgery. He joined Orthopedic Associates of Port Huron in 1980.

After completing his bachelor of science at Central Michigan University in Mt. Pleasant, Michigan, Dr. Ernst received his medical degree from Michigan State University, College of Osteopathic Medicine in East Lansing, Michigan. He then completed both his internship and orthopedic surgery residency at Botsford Hospital in Farmington Hills, Michigan.

Dr. Ernst is certified by the American Board of Orthopaedic Surgery.

When he is not seeing patients, Dr. Ernst enjoys spending time with his family, going on family vacations, gardening, fishing, golfing, and hunting.


  • Central Michigan University, Mt. Pleasant, MI, 1972

Medical School

  • Michigan State University, College of Osteopathic Medicine, East Lansing, MI, 1975


  • Orthopedic Surgery, Botsford Hospital, Farmington Hills, MI, 1980


  • Orthopedic Surgery, Botsford Hospital, Farmington Hills, MI, 1980


  • American Osteopathic Board of Orthopaedic Surgery

Professional Memberships

  • American Osteopathic Academy of Orthopaedic Surgeons, Hand Surgery Section
  • American Osteopathic Association
  • Michigan Association of Osteopathic Physicians

Hospital Affiliations

  • Blue Water Surgery Center
  • Lakeshore Surgery Center
  • Port Huron Hospital
  • St. Joseph Mercy Hospital

Medical Interests

  • ACL reconstruction
  • Arthritis care
  • Arthroscopic surgery
  • Carpal tunnel surgery
  • Fracture care
  • Foot and ankle surgery
  • Minimally invasive procedures of the knee
  • Non-operative treatment
  • Partial knee replacement
  • Rotator cuff repair
  • Shoulder surgery
  • Sports medicine
  • Total joint replacement surgery of the knee and hip


  • Michigan
The best care possible !!!! The entire practice treats you like a family. No long waiting times and everyone is so friendly !! The Staff and Doctors are updated on the most current treatments and procedures. My husband was injured in Iraq and at the same time I was in a severe Motor Vehicle Accident. Dr Pasia took over our care and was compassionate and understanding of our unique situation with both being disabled at the same time. Dr Pasia did his back fusion and repair as well as my neck fusion, we are healing well thanks to his excellent surgical skills. We have worked with their Physical Therapy Department, which goes out of their way to focus on each individuals needs. I have also had Heel spur surgery (fascia release on both feet) with Dr Ernst who again was very professional and I have had no problems since the surgery, how great it is to have no pain when I walk. I would only recommend Orthopedic Associates !!!!!! Thanks for being there for us!