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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.

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. 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.

Heather Partipilo, M.A., LMFT

Heather Partipilo

Ms. Partipilo is a Licensed Marital and Family Therapist. She received her Master of Arts Degree in Clinical Psychology with an emphasis in Marriage and Family Therapy. Ms. Partipilo gained extensive experience while completing her internships in various community mental health settings while working with At-Risk Youth. During this time, she also worked directly with adult’s challenged with memory loss and their families in the West Los Angeles area.

After earning her degree and completing her internship, Ms. Partipilo went on to work with clients across the lifespan focusing on high needs children and families. She has provided therapeutic services in outpatient, group home, non-for-profit, probation, and intensive in-home settings.

Ms. Partipilo has served the role of clinician, consultant, member of interdisciplinary teams, educator and administrator while working with the Los Angeles Department of Mental Health.

Prior to returning to the Chicago area and joining Athans and Associates, Ms. Partipilo maintained a private practice in Los Angeles, CA. She has experience working across the lifespan: children, adolescents, adults, couples and families. Her interests include working with clients to manage depression, anxiety, chronic stress as well as trauma recovery. Her ongoing work with Somatic Therapies allows for a mind-body approach to chronic stress and trauma. It involves “bottom-up processing,” in which attention is primarily directed to the body’s internal wisdom and capacity to heal.

In her free time, Ms. Partipilo enjoys yoga, meditation and equine therapy.


Dr. Ashley Petersen

Petersen-Ashley-2019-PIX-(002)Dr. Petersen graduated from the California School of Professional Psychology with a doctorate degree in Psychology in 2010. She is the newest member to join our practice. Dr. Petersen enjoys working with adults, children, adolescents, foster children, and families. Following the initial assessment, Dr. Petersen will recommend and provide individual or family psychotherapy as discussed in the plan. Psychological testing may be indicated in certain situations to help properly diagnose and treat the individual. Dr. Petersen has had lots of experience as a trauma assessment therapist within a multidisciplinary team at Samaritas as well as many years of experience working in various clinical settings with different populations.

Dr. Petersen is well prepared to provide psychological support services to individuals from a variety of backgrounds with a wide range of needs. She offers a tremendous amount of patience, trustworthiness, ethics, excellent communication skills, reliability, and determination: “I want to strive to make others better and help them be successful!”

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. 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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