Physician Assistant


  • Sports Medicine

  • Joint Replacement Surgery

  • Shoulder

  • Hip

  • Knee



Weill Cornell Medicine Physician Assistant Program,
New York, NY Masters of Health Sciences, 2022

University of California, Santa Barbara, CA
Biological Sciences, B.S. in the College of Letters and Science Honors Program, 2017


Can I See Melanie?


Melanie Lock

Melanie is a physician assistant who works with Dr. Nathaniel Cohen.  She had worked with him for two years previously in sports medicine as his medical assistant before leaving to pursue her PA-C degree.  “I am now returning since graduating from Weill Cornell Medicine as his physician assistant. Dr. Cohen and I work well together both in the clinic and in the operating room, and I look forward to collaborating with him again to provide excellent patient care. I am excited to return and see the patients that I have met in the past, as well as meet the new patients I will be helping treat.”

Melanie will be diagnosing and treating patients in the clinic for all of their acute or chronic sports-related injuries. She will also be providing intra-articular injections when clinically indicated. She assists Dr. Cohen in the operating room to ensure optimal patient-centered care.  They focus on the shoulder, hip and knee.  “I value building a relationship with each patient I meet so together we can build a treatment plan with the goal to get back to the level of activity that they desire.  I enjoy pitting my critical thinking and problem-solving skills against the challenges medicine presents with each new patient on their journey back to health.”

Melanie was born and raised in San Diego, CA and enjoys surfing, backpacking, snowboarding and playing soccer.

Working with:

Nathaniel Cohen, MD
Sports Medicine Surgeon

Nathaniel Cohen, MD is joined by Melanie Lock, PA-C to provide the highest standard of urgent/trauma care.

Physician Assistants:

PAs are medical professionals who diagnose illness, develop and manage treatment plans and prescribe medication. With thousands of hours of medical training, PAs are versatile and collaborative.

Physician Assistants undergo 2,000 hours of clinical rotations during their training.

2000 Hours