Our Team

A Team Approach to
Orthopedic Care

A Team Approach to
Orthopedic Care

At Mercer-Bucks Orthopedics, our strength is our people.

Our team is made up of highly experienced physicians, physician assistants, and rehabilitation specialists who share one common goal: delivering comprehensive orthopedic care that helps patients move better, feel stronger, and live fully.

Each provider brings advanced training and deep expertise in their specialty, but what truly sets our team apart is how we work together. Through a collaborative, integrated approach, we ensure every patient receives well-coordinated care—from the first diagnosis through recovery and beyond.

Our physicians partner closely with physician assistants, physical therapists, and occupational therapists to create personalized treatment plans designed around each patient’s lifestyle, goals, and long-term mobility.

From injury recovery to post-surgical rehabilitation, our team is here to support every step of the journey—helping patients restore strength, regain function, and return to the activities they love most.

Physicians

Board-certified specialists delivering expert care across a wide range of orthopedic and musculoskeletal conditions.

Thomas K. Bills, MD, PhD

General Orthopedics & Osteoporosis Specialist

Frank J.M. Colarusso, DO

Orthopedic Specialist, Spine Specialist, Pain Management Physician

David Eingorn, MD

Orthopedic Joint Replacement Surgeon, Knee & Hip Replacement Specialist, Shoulder Specialist

Philip A. Femano, III, DO

Orthopedic Surgeon & Upper Extremity Specialist

Fredric Kleinbart, MD

Orthopedic Surgeon, Sports Medicine Specialist, Shoulder & Knee Specialist

Matthew McLean, MD

General Orthopedics & Sports Medicine

John P. Nolan, MD

Orthopedic Joint Replacement Surgeon & Sports Medicine Specialist

John J. Roth, DPM

Foot & Ankle Surgeon

Seth Stein, MD

Vascular and Interventional Radiologist

David Wells-Roth, MD

Neurosurgeon

Physician Assistants

Our physician assistants play a vital role in patient care—working alongside our surgeons and specialists to evaluate conditions, assist in procedures, guide treatment plans, and ensure continuity of care.

Daniel Kawash, PA-C

Physician Assistant

Stephen Kwasniewski, PA-C

Physician Assistant

Physical Therapists

Our licensed physical therapists and assistants specialize in evidence-based rehabilitation designed to restore mobility, improve function, and accelerate recovery following injury or surgery.

Kristin Callaghan, DPT

Physical Therapist

Brandon Frisco, DPT

Physical Therapist

Prarthana Gururaj, PT

Physical Therapist

Frank Moceri, LPT

Physical Therapist

Franak Baria, PTA

Physical Therapist Assistant

Andrea Perkins, PTA

Physical Therapist Assistant

Michelle Von Schilling, PTA

Physical Therapist Assistant

Tricia Wittekind, PTA

Physical Therapist Assistant

Occupational Therapists

Our occupational therapists focus on restoring functional independence—helping patients regain the ability to perform everyday activities at home, work, and beyond.

Nicole Hunter, OTR/L, CHT

Occupational Therapist

Alison King, OTR/L, CHT

Occupational Therapist

Ellen Donnelly, COTA

Occupational Therapist Assistant

A Team Approach to
Orthopedic Care

A Team Approach to
Orthopedic Care