Robert Kollmorgen

Associate Clinical Professor
Orthosurgery - Fresno
+1 559 459-4062

Robert Kollmorgen, DO, is board certified in orthopedic surgery and fellowship trained in hip preservation.

He earned his medical degree from Ohio University College of Osteopathic Medicine. He completed his residency in orthopaedic surgery at Midwestern University and his fellowship in hip preservation at Duke University.

Dr. Kollmorgen previously practiced as an orthopaedic surgeon specializing in sports medicine and instructed as an Associate Professor at Ohio University. He also served as a Lieutenant Commander in the United States Navy, caring for active-duty soldiers at Camp Pendleton.

He was awarded the Navy and Marine Corps Commendation Medal for creating the hip preservation and hip arthroscopy program at Naval Hospital Camp Pendleton. He also twice received the Ohio University Fellows Award for Sports Medicine Educator of the Year.

Dr. Kollmorgen is dedicated to providing compassionate and effective care. He believes that excellent health begins with education and prevention and has made it his mission to enlighten patients on ways they can take greater control over their own health.

His hobbies include fitness and spending time with family.

Publications: 

Total Hip Arthroplasty Broach Failure, Incarceration, and Retrieval: A Case Report.

JBJS case connector

Soderlund T, Ghulam-Jelani Z, Kollmorgen R

Editorial Commentary: Pain Relief Following a Preoperative Diagnostic Hip Injection Does Not Predict 2-Year Outcomes after Hip Arthroscopy for Femoral Acetabular Impingement Syndrome.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Patients Undergoing Hip Arthroscopy With Concomitant Periacetabular Osteotomy Demonstrate Clinically Meaningful Improvement at 2 Years Using the Patient-Reported Outcome Measurement Information System and International Hip Outcome Tool 12.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Wilson H, Harris J, Martin R, Ellis T, Kollmorgen RC

Editorial Commentary: The Addition of the Pericapsular Nerve Group Block Leads to Reduced Pain Up to 24 Hours After Hip Arthroscopy.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Editorial Commentary: Physical Therapy Alone May Not Successfully Treat Patients With Hip Pain and Large α Angles or Decreased Femoral Anteversion Combined With Femoroacetabular Impingement Syndrome.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Multiligament Knee Reconstruction of the ACL, PLC, and ALL in a Floating Knee: A Case Report.

Journal of orthopaedic case reports

Kollmorgen R, Singleton A, Eaddy S, Phillips S

Comparison of the PROMIS and iHOT-12 in Determining Satisfaction Levels After Hip Arthroscopy for FAIS.

Orthopaedic journal of sports medicine

Martin RL, Harris JD, Ellis T, Kollmorgen R

Editorial Commentary: Excessive Femoral Retroversion and Increased Femoral Anteversion Has a Negative Effect on Hip Arthroscopy Outcomes: Symptomatic Extremes of Version Require an Osteotomy.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Editorial Commentary: Degeneration of Acetabular Cartilage of any Degree Is a Predictor of Worse Outcome After Hip Arthroscopy for Labral Repair and Femoroacetabular Impingement Syndrome: The Greater the Damage, the Worse the Outcome.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Post-Related Complications in Hip Arthroscopy Are Reported Significantly Greater in Prospective Versus Retrospective Literature: A Systematic Review.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Wininger AE, Mei-Dan O, Ellis TJ, Lewis BD, Kollmorgen RC, Echo A, Harris JD

Editorial Commentary: Post-Free Arthroscopy Reduces Complications and Pain: To Post or Not to Post? Is That Still a Question?

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Editorial Commentary: Patient-Reported Outcomes Measurement Information System (PROMIS) Has Decreased Disease-Specific Responsiveness More Than Legacy Outcome Measures, But PROMIS and Legacy Measures Do Correlate: You Can't Have Your Cake and Eat It Too.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Editorial Commentary: Hip Hypotrophic Labrum Should Not Change Our Treatment Algorithm: Welcome to the Augmented Reality of the Hip-Preservation Zone.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Validation of Self-Reported Smoking Status Among Orthopedic Hip Surgery Patients.

Cureus

Ellis ST, Rao BM, Kohlrieser D, Kollmorgen RC, Sochacki KR

Editorial Commentary: Quantifying Patient Satisfaction After Hip Arthroscopy: I Cannot Deactivate Until You Are Satisfied With Your Care.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Pseudotumor Caused by a Retained Intra-articular Bullet: A Case Report.

JBJS case connector

Rohlfing G, Refaat M, Kollmorgen R

Editorial Commentary: Single Versus Double-Row Abductor Tendon Repair: Is the Juice Worth the Squeeze?

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Relationship Between PROMIS Computer Adaptive Tests and Legacy Hip Measures Among Patients Presenting to a Tertiary Care Hip Preservation Center.

The American journal of sports medicine

Kollmorgen RC, Hutyra CA, Green C, Lewis B, Olson SA, Mather RC

Editorial Commentary: You Cannot Choose the Hip….It Chooses You!! Big Database Versus Private Database Complication Reporting.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

Kollmorgen R

Current Concepts in Labral Repair and Refixation: Anatomical Approach to Labral Management.

American journal of orthopedics (Belle Mead, N.J.)

Kollmorgen R, Mather R