Nicholas K. Callahan, DO
Board-Certified Orthopedic Surgeon | Arthroplasty Specialist
Hip, Knee, and Shoulder Surgery
Dr. Nicholas K. Callahan is a board-certified orthopedic surgeon specializing in advanced joint replacement of the hip, knee, and shoulder. With fellowship training in adult reconstruction, he focuses on minimally invasive, muscle-sparing techniques that support faster recovery and better outcomes.
He has extensive experience in outpatient joint replacement and is one of few surgeons using the subvastus (quad-sparing) approach for knee replacements, which avoids cutting muscle or tendon—reducing pain and improving recovery.
Clinical Focus:
- Total Hip Replacement
- Total Knee Replacement
- Subvastus (Quad-Sparing) Knee Technique
- Shoulder Replacement
- Revision Joint Replacement
Specialities:
- Orthopedics
- Latest Techniques in Total Joint Replacement
- Total Hip Replacement
- Total Knee Replacement
- Total Shoulder Replacement
- Partial Knee Replacement
- Minimally Invasive Joint Replacement
- Direct Anterior Hip Replacement
- Anterior Minimally Invasive Surgery Technique
- Evaluate and Treat Problem Knee Replacements
- Evaluate and Treat Problem Hip Replacements
- Outpatient Hip and Knee Replacement
Education & Training:
- Fellowship: Adult Reconstruction, Whole Health Joint Replacement Institute, Meadville, PA
- Residency: Orthopedic Surgery, Millcreek Community Hospital (LECOM Health), Erie, PA
- Medical School: LECOM at Seton Hill University, Greensburg, PA
Board Certification:
- American Osteopathic Board of Orthopedic Surgery (AOBOS)
Professional Affiliations:
- American Academy of Orthopaedic Surgeons (AAOS)
- American Association of Hip and Knee Surgeons (AAHKS)
- American Osteopathic Association of Orthopedics (AOAO)
- American Osteopathic Association (AOA)
- Orthopedics
- Latest Techniques in Total Joint Replacement
- Total Hip Replacement
- Total Knee Replacement
- Total Shoulder Replacement
- Partial Knee Replacement
- Minimally Invasive Joint Replacement
- Direct Anterior Hip Replacement
- Anterior Minimally Invasive Surgery Technique
- Evaluate and Treat Problem Knee Replacements
- Evaluate and Treat Problem Hip Replacements
- Outpatient Hip and Knee Replacement
WHAT OUR PATIENTS ARE SAYING
Dr. Callahan is awesome!!! He is patient and explains everything. Everyone I dealt with in the office was great.
Dr. Callahan is a very thoughtful and skilled Orthopedic Surgeon. He listens to his patients (never rushes through the appointment) and recommends the best solution. I would trust him with all of my family members—as he treats his patients as if they were his own family.
Dr. Callahan takes the time to listen. You can tell he genuinely cares and is detailed when it comes to explaining the procedure and recovery.
