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Learn about the Doctors of Athans and Associates in Park Ridge, IL

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All the doctors at Athans and Associates have doctoral degrees from   accredited  universities and  have completed internships and  residency  training prior to  receiving their  state license.  Each  provider  also has  many  years of post-doctoral  experience and  training.  Every  year, the  providers participate  in  seminars in  the  latest methods in psychology.  In fact, many are  considered experts  in their  specialties,  often  providing training for other professionals.

The doctors at Athans and Associates are part of the Advocate Family Care Network.


The doctors at Athans and Associates



 Dr. Michael Athans

 Dr. Athans MichaelDr. Michael Athans is a licensed clinical psychologist  practicing for over 30  years. He received his master’s  degree from Columbia University, N.Y. and his  doctorate  degree   from Michigan State University. Dr. Athans completed a  clinical psychology internship at Michael  Reese Hospital and Medical Center in  Chicago and top doctor 2018completed two post-doctoral degrees at the University of  Chicago  and Northwestern University’s Family Institute. Dr. Athans has been on the  medical staff at Advocate Lutheran General Hospital for over 30 years.  As an Advocate Health Care doctor, he has served on many  hospital committees. He was the Chief of Psychology, Department of Psychiatry  from 2003 to 2016. Dr. Athans is a member of the Illinois Psychological Association (IPA) and American Psychological Association (APA).  He is currently Chair of the IPA Membership Committee and formerly a member of the IPA Ethics Committee, participating in state association council meetings. He is also an active member in other state and national professional organizations such as APA’s Pediatric Society and the Clinical Section of IPA.

 Dr. Athans works with children, adolescents, and families. Particular interests include, but are not limited to adult and child attention deficit; anxieties; the strong-willed child; parenting; and health psychology, including psychological factors affecting medical conditions, medical adherence, stress management, and encopresis. Dr. Athans is on the forefront of treatment utilizing biofeedback when indicated for (abdominal) pain disorders.

 Dr. Lynda Behrendt

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Dr. Lynda Behrendt was a medical nurse for ten years, working in home health care, orthopedics, labor and delivery, surgery, ER, psychiatry and sub-acute cardiac care.

 She is an experienced clinician, having been a counselor and clinical psychologist for almost thirty years. In  addition to helping people with  symptoms related to  anxiety, depression and  relationships, specialties include assisting adult clients with spiritual values, medical problems and intercultural  adjustment.

Dr. Behrendt has been the Director of Professional Affairs for the Illinois Psychological Association for over 12 years, assisting other psychology professionals to deal  with legal, licensing, ethical, reimbursement and  educational issues. Dr. Behrendt is also a member and an active participant in the lllinois Psychological Association –  Health Care Reimbursement Committee, serving as a consultant to other professionals in the field. More recently, Dr. Behrendt is the Illinois Psychological Association’s President Elect. The Illinois Psychological Association (IPA) is the largest professional association of psychologists in Illinois. It was organized to advance psychology as a science and a profession and as a means of promoting human welfare. The IPA promotes high standards of ethics, conduct, education and achievement for the field. We are proud to have such an accomplished professional on our staff.



Sheila Collins, Psy.D.

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Dr. Collins earned her doctorate and master’s degrees in Clinical Psychology from Roosevelt University with credentials in Child and Family studies. She obtained her bachelor’s degree in Psychology and Spanish from University of Illinois in Champaign. Dr. Collins is a Post-Doctoral fellow at Advocate Masonic Medical Center in their Pediatric Development Clinic. She completed her doctoral internship at Washburn Center for Children in Minneapolis working with parents, school staff, and families with concerns related to trauma, environmental stressors, mood disorders, and ADHD. Dr. Collins is a member of Illinois Psychological Association (IPA), Association for Psychological Science (APS), and American Psychological Association (APA).

Dr. Collins works with individuals across the lifespan. Her focus and experience deal in the areas of mood disorders, building family communication, ADHD, behavioral disorders, child academic issues, relationship difficulties, stress management, parenting, anger management, self-esteem issues, and life transitions. She also has experience in running groups centered around teaching skills to better understand emotions, promote healthy reactions to stress, improve interpersonal relationships, and learn mindfulness and relaxation techniques. Sheila has a foundation in cognitive behavioral therapy along with play therapy and aspects of psychodynamic therapy, however she believes in utilizing different tools to adopt treatment to fit the individual needs of the client. There is a collaborative approach to treatment, working with the parents of younger clients in order to achieve the goals previously discussed. Ultimately, developing new strengths and learning new skills to effectively manage life’s difficulties, and gaining insight into reasons behind behaviors allows the client to regain the control, facilitating motivation and autonomy in handling life’s stressors. 


Dr. Phyllis Dawson

IMG_1011.JPG rev Dr. Phyllis Dawson is a licensed clinical psychologist. She  is a senior clinician and  has been affiliated with the  practice for over twelve years. Dr. Dawson earned her  doctorate degree in clinical psychology from the Illinois  School of Professional  Psychology. Dr. Dawson has  extensive training in the assessment and treatment of  individuals across the lifespan. Her treatments are research-based and proved to  be effective. Each client’s treatment goals are individualized and discussed in  order to  be effective.

Dr. Dawson enjoys working with individuals and families. Clinical interests include depression, anxiety, women’s/girls’ issues, attention deficit, trauma, grief, anger,  stress management, identity issues, suicide, chronic illness, and parenting.


Dr. James R. Liggett

 Dr. James Dr. James LiggettLiggett is a licensed clinical psychologist. Dr. Liggett  earned his doctorate in clinical psychology from the Illinois School of  Professional Psychology where he  received extensive training in  psychotherapy and diagnostic assessment. Dr. Liggett enjoys working with individuals, couples, and families and has an affinity for work with  pre-teen/adolescent males on issues of self-esteem, emotional expression, and academic underachievement. Other areas of interest include anxiety, depression, attention  deficit, stress management, identity concerns, parenting, and family discord. In addition to his clinical duties, Dr. Liggett has been an adjunct instructor in the College of  Behavioral Sciences at Argosy University since 2008. He is fond of strong black coffee, jazz music, and the Chicago Blackhawks.

Dr. Mary Mika

Dr. Mary Mika Dr. Mika is a licensed clinical psychologist. She graduated from  the Adler School of Professional Psychology and completed her  internship and post-doctoral training at Palos  Behavioral Health  Professionals. Dr. Mika also completed externships at Alexian  Brothers Center for Mental Health, Northwestern University, and  Bridgeview/ Challenger  Day School. Additional training includes  a master’s degree in marriage and family counseling in 2006. Dr.  Mika has also had several years of experience working at Advocate  Lutheran General Hospital in various capacities.

 Dr. Mika works with children, adolescents, adults, and families. She has a health psychology interest, using a cognitive-behavioral model to help empower the individual  toward positive coping and health. Dr. Mika often works with individuals experiencing signs and symptoms of mood dysregulation, anxiety, obsessive-compulsive traits,  attention deficit, as well as other areas. Dr. Mika is also able to communicate in Polish.


Dr. Susan O’Grady

O'Grady PIXDr. O’Grady earned her master’s and doctoral degree in clinical psychology from Argosy     University. Her pre-doctoral internship was at the Gateway Foundation. She has worked with  clients of all ages, but particularly enjoys working with children and adolescents struggling with symptoms of anxiety, depression, developmental issues, etc.  Dr. O’Grady often utilizes CBT and motivational interviewing theories as part of the treatment. She provides evidenced-based treatment and enjoys working with patients struggling with co-occurring disorders.

As a previous teacher, Dr. O’Grady understands how recognizing, accepting, and understanding one’s learning disability, if evident, is the first step to success. She can help develop interventions and recommendations in a student’s IEP, encouraging one’s strengths, understanding the educational system, and working with professionals to help develop strategies for success.  Similarly, Dr. O’Grady also enjoys working with Gifted students, recognizing their unique talents of intellect, motivation and creativity, yet sometimes absent-mindedness.  Dr. O’Grady also understands how other co-morbid disorders such as Attention Deficit Hyperactivity Disorder, Dyspraxia, Executive Functioning, and sometimes Oppositional Defiance can overlap with learning difficulties.

Dr. O’Grady is a member of the American Psychological Association and Illinois Psychological Association.

Dr. Reginald Pacheco


Dr. Pacheco is a Post-Doctoral Fellow Psychologist.  He earned his doctorate degree in clinical psychology from The Chicago School of Professional Psychology, and an undergraduate degree in Psychology from Loyola University Chicago.  Dr. Pacheco completed his pre-doctoral internship at Wabash Valley Alliance in Lafayette, IN.  He has worked in a variety of settings, including inpatient psychiatric hospitals, community mental health centers, a US Department of Labor vocational training center, and private practice.  Dr. Pacheco is a member of the American Psychological Association (APA) and Illinois Psychological Association (IPA).

While Dr. Pacheco works clients across the lifespan, he has particular interests in treating adolescents and young adults with depression, anxiety, adjustment to trauma, and identity development concerns.   His additional areas of interest include working with patients managing co-morbid health concerns and co-occurring disorders.  Dr. Pacheco utilizes evidence-based practices such as cognitive-behavioral interventions, solution-focused therapy, motivational interviewing, and mindfulness-based approaches.  However, Dr. Pacheco believes in a collaborative approach and seeks to adapt therapy to meet client needs.  Dr. Pacheco further enjoys conducting psychological assessments to address a range of referral questions.

Krista Schwegman, MS, LMFT

Dr. SchwegmanMs. Schwegman is a licensed marriage and family therapist. She  earned her Master of  Science degree from The Family Institute  at Northwestern University, graduating with  Academic    Distinction. She also earned her Bachelor of Arts degree at  Northwestern  University. Ms. Schwegman provides  psychotherapy to individuals, couples, and  families, and   specializes in systemic assessment and treatment planning, case    management, crisis intervention, and advocacy. Ms. Schwegman utilizes an integrative approach that incorporates solution-focused, bio behavioral, cognitive-behavioral, experiential, psychodynamic, family of origin, and intrapsychic models and techniques to address each client’s unique needs and goals. Ms. Schwegman is bilingual, and offers therapeutic services in Spanish as needed.

 Ms. Schwegman’s previous experience includes intensive psychiatric crisis stabilization and counseling to at risk children, adolescents, young adults, and their families. Her  particular interests include working with depression, anxiety, trauma, self-injurious behaviors, suicidality, pre-marital and marital conflict, and issues concerning identity,  intimacy, and communication.

Ms. Schwegman is a certified facilitator for the PREPARE/ENRICH couples program and is also certified in Childhood Severity of Psychiatric Illness (CSPI) assessment. She is a member of the American Association of Marriage and Family Therapy, the Illinois Association of Marriage and Family Therapy, and The Family Institute Alumni Association.

Dr. Adam Share


Dr. Share earned his doctorate degree in Clinical Psychology from the Illinois School of Professional Psychology at Argosy University Chicago.  Dr. Share has worked in a variety of settings, including private practice, behavioral health hospital, community mental health center, and therapeutic day schools.  Dr. Share specializes in working with children, adolescents, and families.  He provides individual and family therapy to clients with Autism Spectrum Disorders, Anxiety, Depression, Attention-Deficit/Hyperactivity Disorder, as well as difficulties with social skills, anger management, and interpersonal issues.  He also has experience in treatment planning, case management, Individualized Educational Plans (IEP), and crisis management.    

In his therapeutic approach, Dr. Share provides a nurturing and support environment in order to develop a positive working relationship with each individual.  Dr. Share supports his clients through discovering personal strengths to build confidence and engages clients in the therapeutic process through play and support therapies.  His interventions include cognitive-behavioral therapies, non-directive play therapy, music, art, and mindfulness-based therapy approaches.  Dr. Share utilizes a systems approach incorporating all aspects of the individual’s environment into the therapeutic process.  Dr. Share highly values the expertise of parents regarding their children and works collaboratively with them to design individual treatment plans.


Dr. Vickie Theodos 

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Dr. Vickie Theodos is a licensed clinical psychologist. She  has been practicing at  Athans and Associates since 2005  and is a senior level psychologist. Dr.  Theodos received her  doctorate in clinical psychology from the Illinois Institute of  Technology and completed her clinical child psychology  internship from The  University of  Chicago Department of Psychiatry.

Dr. Theodos’ interests include family and marital issues, coping with medical illnesses, depression, anxiety, pain management, bereavement, effective parenting,    behavioral issues, and working with pediatric patients. Dr. Theodos is trained in the use of biofeedback for patients with pain. She is an experienced clinician,  researcher, and presenter.


Dr. Jillian Wickery

IMG_0551 Wickery revDr. Jillian Wickery is a licensed clinical psychologist. Dr.  Wickery earned her  doctorate from Northern Illinois University and completed her clinical  internship at  the  University of Michigan. Dr. Wickery also completed a  post- doctoral fellowship at The Family Institute at  Northwestern University. Dr.  Wickery is a clinical  lecturer in psychology at Northwestern University and a  visiting assistant professor at Northern Illinois  University.

Dr. Wickery treats individuals, couples, and families and conducts psychological  assessments. Particular interests include working with couples on premarital issues,  communication, intimacy, trust and infidelity; mother-daughter relationships and sibling therapy; LGBT issues; attention deficits, stress management, anxiety and  depression; and conducting evaluations for learning, attention, memory, and emotional difficulties.


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