Greg Thorkelson, MD

About Greg Thorkelson, MD

Dr. Thorkelson, MD is the founder and Medical Director of the Nexus Group. He is board certified in child, adolescent and adult psychiatry. He completed his adult psychiatry training at Temple University and went on to complete a fellowship in child and adolescent psychiatry at the University of Pittsburgh. He completed additional psychodynamic fellowship training at the Psychoanalytic Center of Philadelphia. At the University of Pittsburgh, he served as Associate Medical Director at the Center for Integrative Medicine, as a staff psychiatrist at the John Merck Center for Autism and Developmental Disorders, and as a psychiatrist with the Visceral Inflammation and Pain (VIP) Center based in the Department of Gastroenterology, Hepatology, and Nutrition. He is the former Medical Director of Behavioral Health at The Children's Institute in Pittsburgh.

Dr. Thorkelson has completed additional clinical training in Mindfulness-Based Stress Reduction (MBSR) with Jon Kabat-Zinn, PhD, and Saki Santorelli, EdD. He has advanced training and clinical experience with both Eye Movement Desensitization and Reprocessing (EMDR) and hypnotherapy, and studied advanced nutrient therapies under Dr. William Walsh. Additionally, he completed foundational coursework in Functional Medicine, training alongside staff from the Cleveland Clinic Center for Functional Medicine.

Dr. Thorkelson is an expert on Transcranial Magnetic Stimulation (TMS) treatment in mental health disorders. He has completed advanced training in TMS through both Duke and Harvard Medical Schools. He often collaborates with providers in Germany and Japan to advance the field of TMS. Additionally, Dr. Thorkelson holds a prestigious European TMS Certification, and was awarded a Visiting Fellowship in Electroconvulsive Therapy at The University of Pittsburgh.

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Meet Our providers

Gregory Thorkelson, MD

Medical Director

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Gregory Thorkelson

Dr. Mary Beth Rucki, DNP, CRPN, PMHNP-BC

Mental Health Nurse Practitioner

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Dr. Mary Beth Rucki

Rebekah DeChicko, CRNP, PMHNP-BC

Mental Health Nurse Practitioner

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Rebekah DeChicko

Brittani Mosiniak CRNP, PMHNP-BC

Mental Health Nurse Practitioner

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Brittani Mosiniak

Nicole Snyder, PA-C

Mental Health Physician Assistant

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Nicole Snyder

Rachel Kosciusko, PA-C

Mental Health Physician Assistant

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Rachel Kosciusko

Michelle Staley, PA-C

Mental Health Physician Assistant

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Michelle Staley

Meet Our staff

Hang Ho

Chief Operating Officer

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Hang Ho

Hannah Starcher

Patient Advocate, TMS Clinician

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Hannah Starcher

Julietta Mangino

Patient Advocate, TMS Clinician

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Julietta Mangino

Layla Phouthavong

Patient Advocate, TMS Clinician

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Layla Phouthavong

Karen Havrilla

Practice Manager, TMS Clinician

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Karen Havrilla

Jack Bennett

Project Coordinator, TMS Clinician

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Jack Bennett

Emma Baum

Patient Advocate, TMS Clinician

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Emma Baum

We love what we do

Meet the Team

Rachel Kasciusko

PA-C

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Marry Beth Rucki

DNP, CRPN, PMHNP-BC

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Gary Myers

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Henrietta Castillo

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Mayme Larson

DNP, CRPN, PMHNP-BC

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Jerry Romero

DNP, CRPN, PMHNP-BC

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Ada Cook

DNP, CRPN, PMHNP-BC

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The Nexus Difference

We are here for you

Our providers are more invested, honest and committed to our patients.

We are here for you

Our providers are more invested, honest and committed to our patients.

All ages

At Nexus we treat all ages from adolescence to adulthood.

All ages

At Nexus we treat all ages from adolescence to adulthood.

Wellness

The holistic approach to medicine along with finding the root cause keeps you well instead of just covering up symptoms

Wellness

The holistic approach to medicine along with finding the root cause keeps you well instead of just covering up symptoms

Experienced

Our medical director, Dr. Greg Thorkelson, is the highest ranked psychiatrist in the city.

Experienced

Our medical director, Dr. Greg Thorkelson, is the highest ranked psychiatrist in the city.

Available

Appointments here are available sooner than most other practices.

Available

Appointments here are available sooner than most other practices.

Lasting Health

We asses the entire patient and help you stay healthy. We don't just treat you after you become ill.

Lasting Health

We asses the entire patient and help you stay healthy. We don't just treat you after you become ill.

About Greg Thorkelson, MD

Dr. Thorkelson, MD is the founder and Medical Director of The Nexus Group, PC. He is board certified in child, adolescent and adult psychiatry. Dr. Thorkelson has received adult psychiatric training from Temple University, as well as a fellowship in child and adolescent psychiatry from The University of Pittsburgh. At Pitt, he served as Associate Medical Director at the Center for Integrative Medicine; a staff psychiatrist at the John Merck Center for Autism and Developmental Disorders, and a psychiatrist with the Visceral Inflammation and Pain (VIP) Center, which is based in the Department of Gastroenterology, Hepatology, and Nutrition. In addition, Dr. Thorkelson is the former Medical Director of Behavioral Health at The Children’s Institute in Pittsburgh.

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