Office in New York
  • Areas of Practice:
  • Plastic / Cosmetic Surgery

Dr. Leo Keegan

About Leo Keegan, M.D.

Renowned for his exceptional results in cosmetic and reconstructive plastic surgery, Dr. Leo Keegan is the co-Founder and Medical Director of 5th Avenue Millennium Aesthetic Surgery.

Over the course of nearly two decades as a plastic surgeon in New York City, Dr. Keegan has built a reputation for incomparable patient care and outstanding surgical results.

Dr. Keegan’s breadth and depth of training are extensive in the field of plastic surgery. After earning his medical degree at The Mount Sinai School of Medicine in New York, Dr. Keegan completed eight years of post-doctoral work in general surgery and plastic surgery before entering private practice. Dr. Keegan is among a select group of doctors who have achieved board certification in both general surgery and plastic surgery.

Over 20 years after completing his post-doctoral work, Dr. Keegan remains at the forefront of new developments in cosmetic and reconstructive surgery. His experience and flexibility allow him to create outstanding customizations for his plastic surgery patients. Dr. Keegan has made substantial contributions to many medical research studies during his career, and he maintains an academic appointment as an Assistant Clinical Professor of Plastic Surgery at the Icahn School of Medicine at Mount Sinai in New York City.

Throughout his career, Dr. Keegan has maintained a keen interest in volunteerism and in medical missions. He has served as Medical Director for the Avon 3 Day Walk for Breast Cancer and has participated in medical missions to Honduras, Haiti and Vietnam.

Doctor Info


  • The Mount Sinai School of Medicine, New York

Academic Appointments

  • Assistant Clinical Professor of Plastic Surgery
    • Icahn School of Medicine at Mount Sinai in New York City

Professional Memberships

  • American Board of Plastic Surgery
  • Fellow, American College of Surgeons (FACS)

Dr. Keegan offers a full spectrum of surgical and non-surgical procedures. His experience over many decades has attracted patients from all over the world.

Body Contouring

Breast Surgery

Dr. Leo Keegan has decades of experience with both cosmetic and reconstructive breast surgery.

Facial Surgery

Dr. Keegan will consult with you extensively to understand the facial appearance changes you desire whether a very subtle “more rested” look or a more significant change. Together, you will discuss and determine the procedure or combination of procedures to help you achieve your desired results while minimizing “down time” and discomfort.

Non-Surgical Procedures

Particularly appealing for the patient that does not want down time, enhancement of appearance can be accomplished with non-surgical procedures.

Our Office
Phone: (212) 288-9800
Fax: (212) 860-7446
Monday: 9:00 AM - 5:00 PM
Tuesday: 9:00 AM - 5:00 PM
Wednesday: 9:00 AM - 5:00 PM
Thursday: 9:00 AM - 5:00 PM
Friday: 9:00 AM - 5:00 PM
Saturday: Closed
Sunday: Closed

Dr. Keegan is doctor and a person that goes out of his way to really be there for his patients. I feel very fortunate that I was referred to Dr. Keegan and would not hesitate to refer him to anyone, and quite honestly, I would insist that my closest friends and family go right to him.


Dr. Keegan is simply the best.

It’s hard to believe that both an incredibly skilled surgeon, and an empathic and kind doctor all exist within the same individual. I recently underwent a double mastectomy with reconstruction and Dr. Keegan far exceeded my expectations in every possible way. He made sure that I fully understood all of my options, he listened to me carefully and fully answered my questions, he reassured me, and he made important observations and guided the whole process from beginning to completion. He is a doctor and a person that goes out of his way to be there for his patients.


I can’t say enough about Dr. Keegan! He performed two separate and significant surgeries on me (abdominoplasty and mastopexy/upper back lift–due to significant weight loss) and both my results as well as patient experiences far exceeded my expectations! Why?–Dr. Keegan is not only an exceptionally skilled physician (who puts safety first) but also a true ARTIST–the very unusual “secret ingredient” that SO few cosmetic surgeons possess! Dr. Keegan’s years of experience gives him a quiet confidence and his genuine, kind and thoughtful demeanor automatically puts you at ease and confident about your outcomes. Also, Dr. Keegan & his staff are incredibly kind, attentive and thorough, delivering outstanding patient care throughout all stages of treatment. Professional, skilled and kind. Dr. Keegan’s reputation precedes him . No need for “flashy” or pushy sales staff–how refreshing amidst from the scores of “plastic” NYC plastic surgeons! Honestly, I really feel so fortunate to have found Dr. Keegan as he really delivered wondrous and amazing results for me! Search no more!


Spectacular physician. He carries incredible knowledge about the medical reality of breast cancer mastectomy reconstruction. He was able to guide me through all my options, and he never rushed the explanations or my decision-making. Beyond the medical expertise, Dr. Keegan is highly skilled with aesthetics. I highly recommend this practice, and Dr. Keegan, for the sometimes very difficult process of reconstruction after a diagnosis of breast cancer. I feel confident in my care.


Dr. Keegan is – hands down – one of the most talented, intuitive reconstructive plastic surgeons in New York City. When I was diagnosed with breast cancer, I chose him as my surgeon because he spent hours answering all my questions, was a straight-shooter, and made sure I was reassured on every level. My reconstruction is so amazing, most people think I’ve had an augmentation. His passion for his work and his dedication to his patients is unparalleled.

I had a double masectomy and breast reconstruction by Dr. Keegan. He is not only an excellent surgeon but also puts the patient first and never minimizes any concern you have. He is very easy to talk to. Dr. Keegan and his staff have respect for the patients time and their wellbeing. I would recommend him in a heartbeat.