Locations and Appointments

Insurances Accepted

Please contact the doctor's office to verify that your insurance is accepted.

*Indicates this doctor is no longer accepting new patients with this insurance plan.

Personal Statement

I am an Assistant Professor of Clinical Psychiatry at Weill Cornell Medicine and an Assistant Attending Psychiatrist on the inpatient adolescent unit at NewYork-Presbyterian Westchester Behavioral Health Center. I specializein both adult, and child and adolescent psychiatry and provide comprehensive evaluations and consultations for both psychotherapy and psychopharmacology. I take a comprehensive, individualized, thoughtful and evidenced based approach in order to provide the best possible care to each of my patients.

Biographical Info

Dr. John Mahlstedt attended Union College where he obtained a bachelor of arts in managerial economics and graduated Summa Cum Laude and was selected for the Phi Beta Kappa honor society. There he earned numerous other honors, including awards for academic excellence and service to the college community. He then went on to earn his Medical Degree from the University of Connecticut School of Medicine, where he earned an award for his research work and earned honors in various clerkships for clinical excellence, including psychiatry. Dr. John Mahlstedt then went on to complete his internship and residency in adult psychiatry at NewYork-Presbyterian / Columbia University Medical Center and served as Chief Resident during his last year of residency. Dr. Mahlstedt then went on to complete fellowship in Child and Adolescent Psychiatry at both of the Cornell and Columbia campuses of NewYork-Presbyterian hospital. During his fellowship, Dr. Mahlstedt earned the Edward J Sachar Award for excellence inclinical care. Dr. Mahlstedt welcomes patients to his practice for diagnostic evaluations, consultations, psychotherapy and medication management.

Honors and Awards

• Edward J Sachar Award for excellence in clinical care, 2021
• Chief Resident in psychiatry, Columbia University Medical Center 2018 - 2019
• Sigma Xi Research Honor Society Appointment, 2014
• Presidential Meritorious Service Award, Union College, 2010
• Phi Beta Kappa, Union College, 2010
• Omnicron Delta Kappa Leadership and Honors Society, Union College, 2010
• Omnicron Delta Epsilon Economic Honor Society, Union College, 2010
• Lee and William Wrubel Memorial Prize, Union College, 2010
• Elias Peissner Prize, Union College, 2010
• Harold and Ellen Nagorsky Memorial Prize, Union college, 2010

Board Certifications
American Board of Psychiatry & Neurology (Psychiatry)
Clinical Expertise
Supportive Psychotherapy
Psychodynamic Psychotherapy
College Age Mental Health
Young Adult Mental Health
Work Related Problems
Generalized Anxiety Disorder
ADHD (Attention Deficit Hyperactivity Disorder)
Panic Disorder
Bipolar Disorder
Medication Management
  • M.D.
    University of Connecticut School of Medicine
  • B.A.
    Union College
  • Assistant Attending Psychiatrist
    NewYork-Presbyterian Hospital
  • Assistant Professor of Clinical Psychiatry
    Weill Cornell Medical College, Cornell University

Relationships and collaborations with for-profit and not-for profit organizations are of vital importance to our faculty because these exchanges of scientific information foster innovation. As experts in their fields, WCM physicians and scientists are sought after by many organizations to consult and educate. WCM and its faculty make this information available to the public, thus creating a transparent environment.

Other Interest: 
New York Center for Living