Plastic & Reconstructive Surgeon
Dr. Katie Armstrong, MD, MSc, FRCSC
Royal College–certified plastic and reconstructive surgeon, practising in Mississauga and serving Toronto and the Greater Toronto Area.
Dr. Katie Armstrong is a plastic and reconstructive surgeon certified by the Royal College of Physicians and Surgeons of Canada (MD, MSc, FRCSC), registered with the College of Physicians and Surgeons of Ontario under CPSO #95685. She completed her medical degree and her plastic and reconstructive surgery residency at the University of Toronto, alongside an MSc in Health Services Research.
She practises in Mississauga and sees patients from across Toronto and the Greater Toronto Area, performing facial, breast, body and gender-affirming surgery, and holds active surgical privileges at Women’s College Hospital, Toronto. The Self Institute is a way of thinking about surgical care as the start to feeling your truest self.

Her approach
Precision and genuine compassion
Dr. Katie Armstrong brings reconstructive precision and a respectful, attentive manner to every consultation. She takes the time to answer questions, set realistic expectations, and ensure you feel informed and supported at each step.
A surgeon and researcher, she is committed to the evidence-based advancement of surgical care.
Credentials
Training you can trust
Dr. Katie Armstrong is a Royal College–certified plastic and reconstructive surgeon with active hospital affiliations in Toronto. See the facility where your surgery takes place.
Education & training
- Doctor of Medicine (MD) and Plastic & Reconstructive Surgery fellowship, University of Toronto
- MSc in Health Services Research — Institute of Health Policy, Management & Evaluation, University of Toronto
- BSc, McMaster University
Affiliations
- Active surgical privileges, Department of Surgery, Women’s College Hospital, Toronto (since 2021)
- GraceMed Mississauga x McLean — consultations and surgery (since 2020)
Academic
- Assistant Professor, Department of Surgery, University of Toronto
- Clinical Investigator, Department of Surgery, University of Toronto (since 2021)
- Early Career Researcher, Department of Surgery, Women’s College Hospital (since 2021)
Publications
- In their own words: experiences surrounding masculinising chest surgery among transgender and gender-diverse adolescents – a secondary analysis of GENDER-Q data BMJ Open, 2026
- Masculinizing chest surgery outcomes by body mass index and American Society of Anesthesiologists class in ambulatory care Journal of Plastic, Reconstructive & Aesthetic Surgery, 2026
- Desire for and Successful Access to Feminizing and Masculinizing Gender-Affirming Surgeries: A Cross-Sectional Canada Wide Survey Plastic Surgery, 2026
- Voices Of Trans Youth: A Qualitative Exploration of Expectations for Top Surgery Plastic & Reconstructive Surgery – Global Open, 2025
- Surgeon Sex and Postoperative Resource Utilization: A Population-Based Cohort Study Annals of Surgery Open, 2025
- Development and Assessment of a Patient-Reported Outcome Instrument for Gender-Affirming Care JAMA Network Open, 2025
- Bridging gaps in Canadian health research: The critical role of sex, gender, and equity in shaping inclusive and evidence-informed health care Canadian Pharmacists Journal, 2025
- Development of a Patient-Reported Outcome Measure for Youth Receiving Gender-Affirming Care: The GENDER-Q Youth Module Transgender Health, 2025
- “I Want It to Look Natural”: Development and Validation of the FACE-Q Aesthetics Natural Module Aesthetic Surgery Journal, 2024
- Association Between Surgeon Sex and Days Alive at Home Following Surgery: A Population-Based Cohort Study Annals of Surgery Open, 2024
- Regret after Gender-Affirming Surgery: A Multidisciplinary Approach to a Multifaceted Patient Experience Plastic & Reconstructive Surgery, 2024
- Binary and Nonbinary Transgender Patient Experiences Accessing Gender-affirming Top Surgery Plastic & Reconstructive Surgery – Global Open, 2024
- The landscape of Medicare policies for gender-affirming surgeries in Canada: an environmental scan BMC Health Services Research, 2024
- Surgeon Sex and Long-Term Postoperative Outcomes Among Patients Undergoing Common Surgeries JAMA Surgery, 2023
- A Safe and Efficient Technique for Pedicled TRAM Flap Breast Reconstruction Plastic & Reconstructive Surgery, 2023
- Patient reported symptoms and adverse outcomes seen in Canada's first vaginoplasty postoperative care clinic Neurourology & Urodynamics, 2023
- Case report of a breast granular cell tumor in a young transgender man International Journal of Surgery Case Reports, 2022
- Association of Surgeon-Patient Sex Concordance With Postoperative Outcomes JAMA Surgery, 2022
- Protocol for a scoping review on transition-related surgery procedures, outcome measures and access to care BMJ Open, 2022
- Association Between Surgeon and Anesthesiologist Sex Discordance and Postoperative Outcomes: A Population-based Cohort Study Annals of Surgery, 2022
- Stable rates of operative treatment of distal radius fractures in Ontario, Canada: a population-based retrospective cohort study (2004–2013) Canadian Journal of Surgery, 2019
- Disposal of Paper Records Containing Personal Information in Hospitals JAMA, 2018
- Effect of Home Monitoring via Mobile App on the Number of In-Person Visits Following Ambulatory Surgery JAMA Surgery, 2017
- Determinants of increased acute postoperative pain after autologous breast reconstruction within an enhanced recovery after surgery protocol: A prospective cohort study Journal of Plastic, Reconstructive & Aesthetic Surgery, 2016
- The Effect of Mobile App Home Monitoring on Number of In-Person Visits Following Ambulatory Surgery: Protocol for a Randomized Controlled Trial JMIR Research Protocols, 2015
- Quality of recovery in women undergoing autogenous breast reconstruction in an ambulatory setting Plastic & Reconstructive Surgery, 2014
- Replacing Ambulatory Surgical Follow-Up Visits With Mobile App Home Monitoring: Modeling Cost-Effective Scenarios Journal of Medical Internet Research, 2014
- Union and bone resorption of free fibular flaps in mandibular reconstruction 2013
- Evaluation of txt2MEDLINE and development of short messaging service-optimized, clinical practice guidelines in Botswana 2012
- MHealth applications for clinical education, decision making, and patient adherence in Botswana 2011
- Pyogenic granulomas during isotretinoin therapy 2011
Awards
- Mentor Best Clinical Paper, Division of Plastic & Reconstructive Surgery, University of Toronto
- Outstanding Paper Award (Trainee Category), Women’s College Hospital Research Institute
- Leo Mahoney Resident Teaching Award, St. Michael’s Hospital, Toronto
- Michael Decter Scholarship for Health Leadership and Policy Studies, St. Elizabeth Health Care
Areas of focus
What she performs
Dr. Katie Armstrong’s practice spans three areas. Each links to the full list of procedures she offers within it.
Why patients choose her
What makes the practice different
Royal College certified
Dr. Katie Armstrong is certified by the Royal College of Physicians and Surgeons of Canada (FRCSC), with surgical training at the University of Toronto.
Personalized, attentive care
Consultations are a genuine conversation — your goals lead the plan, and you decide at your own pace.
Natural, individualized results
The aim is to look like a rested, confident version of yourself — refined and proportionate, never overdone.
Accredited surgical facility
Procedures are performed in a fully accredited surgical facility with dedicated anesthesia care throughout.
Questions & answers
Choosing a plastic surgeon in Toronto and the GTA
Practice philosophy
How she approaches the work
The Self Institute is the name Dr. Katie Armstrong gives her approach to surgical care — the person before the procedure, and care that continues past the operating room. It is set out in full on the practice philosophy page.
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Procedures performed
FRCSC
Board certified

Dr. Katie Armstrong
The Self Institute
Plastic & Reconstructive Surgeon
50 Burnhamthorpe Rd W, Suite 343, Mississauga, ON L5B 3C2