COVID-19 (Coronavirus) Update: Testing and Information | Vaccine Updates | Visitor Guidelines

Keenan M. Horness, PA-C, MPAS

Remove | Saved Doctors ()
Physician Assistant Surgical
Accepting New Patients

Call for an appointment

New & Established Patients Call 414-805-6655
Call for an appointment


I attended Marquette University for both my undergraduate degree in Biomedical Sciences as well as my Master’s degree in Physician Assistant Studies, graduating in 2011. Upon graduation, I was lucky enough to quickly find my true calling to the field of Musculoskeletal Oncology. I did not go into medicine knowing this was the subspecialty that I would end up in, but it has become clear over the years that taking care of patients with benign and malignant bone and soft tissue tumors is my true passion.

I have such a strong sense of fulfillment knowing I am helping take care of patients to the highest level of care and compassion working alongside my supervising physician Dr. David King. I assist him in both the surgical and clinical setting.  I also have the honor of working with an amazing team and multidisciplinary group of people who share the same patient care model.  I went into medicine to make a difference and feel as though I have the opportunity to do this each and every day.

My care philosophy is The Golden Rule of Medicine: to treat each patient the way I would want myself or family member treated. I try to connect on a personal level and be a part of the support system during what is oftentimes a difficult medical journey.  I take the time to listen to the patient’s story, make an accurate diagnosis, and determine a treatment plan that includes the patient’s voice in the decision-making process.

One of my favorite quotes from Robert Byrne that I strive to uphold in my practice is as follows: “The purpose of life is a life with a purpose.” I have found my purpose in caring for my patients, and my hope is that during each encounter I make my patient feel better in some way often beyond what is outlined in any sort of treatment plan.


Diseases & Conditions

Bone and Soft Tissue Sarcomas
Metastatic Bone Disease
Musculoskeletal Tumors
Vascular Anomalies of Bone and Soft Tissue

Treatment & Services

Complex Joint Reconstruction
Limb Salvage Surgery
Musculoskeletal Oncology
Orthopaedic Rehabilitation
Orthopaedic Surgery

Ages Seen


Languages Spoken


Hospital Affiliations

Froedtert Hospital


Center For Advanced Care - Froedtert Hospital

Education & Training

Marquette University - Milwaukee - WI - Master Physician Assistant Studies - (2011)

Marquette University - Milwaukee - WI - Bachelor of Science Biomedical Sciences - (2010)

Patient Reviews

This provider either does not meet the threshold to display a star rating with comments or is temporarily not displaying a star rating and comments while we update our system. Learn more about our survey.

Visit for videos, patients reviews and more.