Dr. BatterbeeKevin Batterbee, D.O. - Board Certified Psychiatrist - Michigan Medical Director, Great Lakes TTC, LLC.

Dr. Kevin Batterbee is a well-known area physician who will be providing medication management utilizing our state of the art tele-video conferencing suite. The advancements of technology allow private streaming video sessions in the Petoskey location with on-site staff to assist as a contact point for daily needs. Dr. Batterbee’s educational background consists of undergraduate studies from Michigan Tech University, Medical Education - Michigan State University, internship at Ingham Regional Medical Center/Michigan, and residency at Michigan State University – Dept. of Psychiatry. He specializes in adult psychiatry and also treats adolescents 14 + years with the ability to evaluate clients and to determine whether or not symptoms are the result of a medical or mental illness or combination. Dr. Batterbee’s extended schooling period involves comprehensive training in psycho-pharmacology, medical care issues, psychiatric diagnosis, and psychotherapies.

drzAhmad Zubairi, M.D. - Board Certified Adolescent and Adult Psychiatrist

Dr. Zubairi is a Board Certified Adult Psychiatrist who also has Board certification in Child and Adolescent Psychiatry. Dr. Zubairi is not accepting patients at this time.


ADAnthony DiLoreto, PMHNP-BC

Anthony is a board certified Psychiatric Mental Health Nurse Practitioner. He is joining the practice with a wide variety of experience within the mental health field. He graduated with his bachelors of science in nursing from the University of Detroit Mercy. He then went on to Wayne State University to complete his masters degree of science in nursing with specialization in mental health. Since then, he has had extensive experience in providing inpatient and outpatient mental health treatment, as well as providing home health care services for those with mental illness. He has served as a mental health consultant for oncology services, pain, palliative care, and hospice programs, also providing inpatient mental health education. He is passionate about reducing the stigma associated with mental illness and providing integrative mental health treatment. He is currently enrolled in the doctorate of nursing practice program at the University of Michigan-Flint. He resides in Rochester, Michigan with his wife and labradoodle. As of January 2019 Anthony is not accepting patients at this time.

geriGeraldine Dorris, PMHNP-BC

Geraldine "Geri" Dorris received her Bachelor of Science and Master of Science in Nursing from Wayne State University. Her Associates Degree in Applied Science was received from Macomb Community College, Michigan. Living downstate she has practiced at St. John Hospital Corp and the Detroit Medical Center. While speding time in Florida, Geri, worked with several nursing homes, assisted nursing facilities and in her private practice. Having a nursing specialization in Adult Psychiatric Mental Health allows her to offer psychotherapy in combination with prescribing medicines. This includes Cognitive Behavioral Therapy, Supportive Therapy, Educational Therapy and health teachings which assist working with adults who have depression, anxiety, bipolar disorder, cognitive impairment and demenita diagnosis. Geri welcomes input from families and support persons involved to help provide total patient care. Hobbies include spending time with her husband and family now relocated back to Northern Michigan, reading, walking, bicycling, being in nature and being an active member of several area orginazations.

ndNatalie Ducastel, PMHNP-BC


Natalie is a board certified Psychiatric Mental Health Nurse Practitioner. Her passion for the mental health field started early in her life and she received her undergraduate degree in psychology at Miami University of Ohio. She then went on to obtain her Masters in Higher Education and worked as an academic counselor for several years. With a passion for helping others and a strong interest in science, Natalie transitioned to the nursing field. She completed her Masters of Science degree with a focus in psychiatric nursing at Ohio State University. Her experience includes working with individuals with mood disorders, schizophrenia, bipolar disorder, depression, anxiety, and sexual and gender identity issues, among many other mental health concerns. Natalie looks forward to best serving the needs of her clients with a focus on overall health and wellness.


sfSebi Fishta

 Sebi Fishta, LPC - PhD Cand. - Great Lakes now offers testings for ADHD/ADD known as IVA-2 and other neuropsych testings! Sebi will be offering these additional screeings for adolescent and adult patients. Appointments are being scheduled now and no referral is required

derekDerek Johnson, MSW, LMSW CEO Great Lakes TTC, LLC.

A native of Northern Michigan, Mr. Johnson completed his undergraduate studies at Madonna University and graduate studies in social work at Michigan State University, both with highest honors. Derek is 1 out of 10 certified family psycho-education educators for the state of Michigan. He is a consultant and trainer to other providers for evidence based practice. He has over 15 years of experience working directly with clients and their family members coping with situational stressors, substance abuse, crisis intervention and mental illness.

great lakes ttc logo

Carrie Harrison, LLMSW

Photo coming soon.....

Carrie received a Bachelor of Science in Public Administration and Community Development from Central Michigan University and a Master’s of Social Work from Edinboro University of Pennsylvania.

Her practice is Solution-Focused Brief Therapy (SFBT) treatment model. Unlike traditional forms of therapy that take time to analyze problems, pathology and past life events, SFBT concentrates on finding solutions in the present time and exploring one’s hope for the future by building upon strengths.

Additionally, she will incorporate Trauma-Focused Cognitive Behavioral Therapy (TF-CBT). This model addresses the specific emotional and mental health needs of adolescents, adult survivors, and families who are struggling to overcome the destructive effects of trauma.

Finally, Carrie is a firm advocate in the power of both nature and physical exercise. She strives to initiate problem solving and creative thinking to navigate the complexities and effects that increased technology use and screen time have on your mental health. She looks forward to being able to support each of you navigate your path to becoming your healthiest you!



moriahMoriah Schultz, R.N. -  Practice Manager

Moriah Schultz is our director of Nursing and a graduate from North Central Michigan College. Working history includes: 8 years long term care—high acuity, 3 years primary care with a holistic focus and 8 years currently specializing in the mental health field. Education continuation allows her the ability to evaluate and provide care for patients with psychiatric disorders, medical mental conditions, to substance abuse problems. Moriah is licensed to provide emergency psychiatric services, assess the psychosocial/physical state of patients, create treatment plans, and continually manage client care. She will serve as your on-site contact for medication concerns, nursing evaluations and intake scheduling.

healthMary Lee Maybank

Mary Lee is a native Northern Michigander with many years working within the health care field. She will assist in scheduling new patient appointments and serves as a centerpoint for tele-med needs. Specializing years managing substance abuse clinics has provided great insight into combined diagnosis and the interpersonal communication skills required to assess our clients needs. Mary Lee is one of the smiling faces that will greet you and help in billing needs as well. 

 Sebi Fishta, LPC - PhD Cand. - Great Lakes now offers testings for ADHD/ADD known as IVA-2 and other neuropsych testings! Sebi will be offering these additional screeings for adolescent and adult patients. Appointments are being scheduled now and no referral is required. His full biography will be coming soon!



Copyright © Great Lakes TTC | Site Developed by Common Angle, Inc.