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Contact UsAt Plastic Surgical Associates, Dr. Diane Duncan combines decades of surgical artistry with cutting-edge regenerative science to deliver elegant, lasting results. Her work helps patients feel confident, capable, and connected to their best selves again.

Dr. Duncan is an award-winning and globally recognized plastic and reconstructive surgeon. She has been honored by America’s Top Surgeons, Castle Connolly Top Doctor, and as a Five-Star local provider by Talk of the Town. Her expertise is trusted by patients and peers around the world.













Dr. Duncan understands the challenges that can restrict recovery time and budget, whether it’s family responsibilities, professional demands, or a busy lifestyle. Her goal is to provide enduring, high-quality results while minimizing downtime and maximizing safety.
Some patients prefer to avoid the risks, scars, or anesthesia associated with traditional surgery. Dr. Duncan has pioneered many minimally invasive techniques and regenerative treatments that deliver beautiful, natural results without extensive recovery. When appropriate, she also offers nonsurgical alternatives for subtle, effective enhancement.
Dr. Duncan is an educator who trains surgeons across the globe in new, advanced techniques designed for safer procedures and better patient outcomes. She frequently lectures and performs live demonstrations in Europe, Asia, South America, and throughout the United States.
Her charitable work has taken her to Bhutan, Central America, and the Middle East, where she has volunteered her skills to help underserved patients. Locally, she has supported the Fort Collins Police Department in gang member rehabilitation initiatives, an example of her dedication to helping people rebuild their lives inside and out.
When not traveling, Dr. Duncan continues her work at Plastic Surgical Associates in Fort Collins, where she also trains other physicians. She conducts FDA-level clinical trials and IRB-endorsed studies, contributing to the advancement of safe, effective aesthetic medicine. As a member of the Editorial Board for the Aesthetic Journal of Surgery and a reviewer for multiple peer-reviewed journals, Dr. Duncan remains a respected thought leader in her field. For those seeking expert care in the Fort Collins area, Plastic Surgical Associates is proud to have her leadership, delivering world-class surgical and nonsurgical solutions tailored to every individual’s goals.

“I had liposuction done on my lower abdomen and flanks and everything went really well. I think Dr. Duncan and her staff are incredible. Everyone is incredibly nice and welcoming, and they were patient with all of my questions. My body looks as well as it should 6 weeks after surgery and I can't wait to see the final results in several months. I would definitely choose her again.”
5 star rating
“I had 2 big babies. Every time I lost weight I still had an "apron" & had to Stuff it in my pants; also had a "roll" over the top. Have seen women who got yeast infections & skin breakdown under it & I didn't want that as I age. I feel so much better & healthier which was my goal! Well worth it!”
5 star rating
“My experience was great from the beginning. My options were reviewed and explained in detail. The staff took extra time to explain the procedure that would be best for me, considering my desired look and the doctors professional opinion. Doctor Duncan and staff always took the time to work with me during my follow up visits and explained exactly what I needed to do to get the maximum results. My results were amazing,...”
My experience was great from the beginning. My options were reviewed and explained in detail. The staff took extra time to explain the procedure that would be best for me, considering my desired look and the doctors professional opinion. Doctor Duncan and staff always took the time to work with me during my follow up visits and explained exactly what I needed to do to get the maximum results. My results were amazing, much more than I expected! Thank You all!
5 star rating
“Duncan and her staff were wonderful. Duncan showed an extremely high level of professionalism and concern for the best results. She was strict in a way I appreciated and the staff made me comfortable”
5 star rating
“I had chronic back pain before I started EmSculpt Neo treatment. I could never bend over without having a lot of pain. Now, even three months after treatment, I can move freely without issue! I can lie on the floor or the couch, do workouts, and stand for long periods of time without any back issues whatsoever. I highly recommend this treatment.”
5 star rating
“I want to thank Dr. Duncan and PSA for the incredible transformation they were able to achieve with my body. Having children and age had made me feel disfigured and unfeminine. I researched for a long time, many different surgeons, and even considered going out of the country. I am so glad I went with Dr. Duncan and PSA. I feel beautiful and look natural. She is a true artist. Thank you for giving me my femininity ba...”
I want to thank Dr. Duncan and PSA for the incredible transformation they were able to achieve with my body. Having children and age had made me feel disfigured and unfeminine. I researched for a long time, many different surgeons, and even considered going out of the country. I am so glad I went with Dr. Duncan and PSA. I feel beautiful and look natural. She is a true artist. Thank you for giving me my femininity back.
5 star rating
“Most of my life, I was happy with my C-cup breast size. But after having four children and turning 41, my breasts were small and sagging and barely an A-cup! I made a consultation appointment with Dr. Duncan because of her 20+ years of experience, and at my initial consultation, I immediately felt comfortable. Dr. Duncan listened to me and took the time to answer all of my questions. I consulted with two other plasti...”
Most of my life, I was happy with my C-cup breast size. But after having four children and turning 41, my breasts were small and sagging and barely an A-cup! I made a consultation appointment with Dr. Duncan because of her 20+ years of experience, and at my initial consultation, I immediately felt comfortable. Dr. Duncan listened to me and took the time to answer all of my questions. I consulted with two other plastic surgeons, who both recommended an implant size larger than that of Dr. Duncan. I would have been very unhappy with breasts larger than I have now!! I definitely made the right choice in selecting Dr. Duncan for my breast augmentation.
5 star rating
“Please accept my sincere gratitude for the excellent medical care I received from you and your staff. Your patience and understanding regarding my many inquiries were handled in a very professional manner. Your staff was especially courteous, prompt, and caring. Thank you for being the greatest Doctor I have ever met in a long, long time.”
5 star rating
“I can’t say enough about Dr. Duncan and her staff! I was made to feel comfortable every step of the way, and I genuinely had a great time through the whole process, even during surgery. Diane Duncan exudes confidence in her craft, and it is displayed in her work, experience, and reputation worldwide. I have never had any type of surgery, and Dr. Duncan, the nurses, and staff members were wonderful on the day of...”
I can’t say enough about Dr. Duncan and her staff! I was made to feel comfortable every step of the way, and I genuinely had a great time through the whole process, even during surgery. Diane Duncan exudes confidence in her craft, and it is displayed in her work, experience, and reputation worldwide. I have never had any type of surgery, and Dr. Duncan, the nurses, and staff members were wonderful on the day of surgery (and throughout the process) and set me completely at ease. I am VERY pleased with my experience and would recommend Dr. Duncan to anyone interested in Plastic Surgery.
5 star rating
“Only after this wonderful surgery have I come to realize what you have given back to me, almost as a by-product of the surgical procedures. Joy, pure and simple joy! I am renewed, whole again, and complete. Astonishing discoveries, for someone whose expectations were so very limited. Thank you for being a part of the most positive experience of my life. I hear the scientist speak as I listen to your words. I see the ...”
Only after this wonderful surgery have I come to realize what you have given back to me, almost as a by-product of the surgical procedures. Joy, pure and simple joy! I am renewed, whole again, and complete. Astonishing discoveries, for someone whose expectations were so very limited. Thank you for being a part of the most positive experience of my life. I hear the scientist speak as I listen to your words. I see the artist’s work as I glance at my face. Thank you.
5 star rating
“From the beginning to the end, my experience with Dr. Duncan and staff was over-the-top exceptional. Everyone was helpful, knowledgeable, and very friendly. I feel the work I had done was perfect and that Dr. Duncan achieved a very natural look for my body. I highly recommend PSA and will be visiting them again in the near future for other procedures.”
5 star rating
“I had a rhinoplasty with Dr. Duncan about a month and a half ago. Everything went smoothly and healed up great! I had to get a septoplasty as well with a different doctor, and she was so great with accommodating for that. Little to no bruising anywhere, just a scar where my nose was opened, but with scar cream it is fading slowly. I love my new nose!”
5 star rating
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