Dr. Mary Ann Dier-Zimmermann, LCPC
Illinois · 35 years in practice
Dr. Mary Ann Dier-Zimmermann is a Licensed Clinical Professional Counselor (LCPC) practicing in Illinois with 35 years of experience.
License and registration
- LCPC, Illinois
- 180-001433 · expires March 2027
- NPI
- 1336298306 · national provider identifier
- Years in practice
- 35
- Languages
- English
Details are as listed on the therapist's public professional profile. You can check the license with the issuing state board, and the NPI with the national registry.
About Mary
Dr. Mary Ann Dier-Zimmermann is a Licensed Clinical Professional Counselor (LCPC) practicing in Illinois with 35 years of experience. She focuses on helping people navigate stress, anxiety, depression, grief, relationship struggles, and struggles related to sexual orientation.
She meets clients with respect and listens carefully to understand their situation. Her approach begins with a clear assessment and a simple plan. Sessions emphasize honest conversation about the issues that matter most.
Background and approach
She pays attention to how beliefs, spirituality, and relationships shape a person’s life and choices. Dr. Dier-Zimmermann draws on several approaches in her work.
Existential therapy helps people examine meaning, responsibility, and how they want to live. Acceptance and Commitment Therapy (ACT) offers ways to clarify values and take small steps toward meaningful change. Attachment-based ideas look at patterns in close relationships and how they affect current struggles.
People come to her for a wide range of concerns including trauma, addiction, parenting questions, intimacy issues, career shifts, and caregiver stress. She also addresses more specific areas such as abandonment, adoption and foster care concerns, body image, and blended family issues. In sessions she aims to create space for honest talk and practical steps.
The focus is on real-life changes you can try between meetings, and on strengthening relationships and supports that matter most.
Focus areas and approaches
Everything Mary lists on their public professional profile, in their own terms.
- Stress, Anxiety
- LGBT
- Relationship issues
- Bipolar disorder
- Depression
- Addictions
- Family conflicts
- Trauma and abuse
- Grief
- Intimacy-related issues
- Parenting issues
- Anger management
- Self esteem
- Career difficulties
- Coping with life changes
- Compassion fatigue
- Abandonment
- Adoption and foster care
- Aging and geriatric issues
- Attachment issues
- Avoidant personality
- Blended family issues
- Body image
- Cancer
- Caregiver issues and stress
- Codependency
- Commitment issues
- Coping with natural or human-caused disaster
- Dependent personality
- Dissociation
- Divorce and separation
- Emptiness
- Family of origin issues
- Family problems
- Fatherhood issues
- Forgiveness
- Gender dysphoria
- Guilt and shame
- Hospice and end-of-life counseling
- Infidelity
- Isolation / loneliness
- Life purpose
- Midlife crisis
- Mood disorders
- Multicultural concerns
- Narcissism
- Personality disorders
- Post-traumatic stress
- Prejudice and discrimination
- Process addiction (porn, exercise, gambling)
- Seasonal Affective Disorder (SAD)
- Self-harm
- Self-love
- Sexuality
- Women's issues
- Workplace issues
- Young adult issues
Approaches Mary names
- Existential Therapy
- Acceptance and Commitment Therapy (ACT)
- Attachment-Based Therapy
- Client-Centered Therapy
- Gottman Method
- Imago Relationship Therapy
- Jungian Therapy
- Mindfulness Therapy
- Psychodynamic Therapy
- Solution-Focused Therapy
Naming an approach is not evidence of training in it. This directory copies what each therapist lists and does not check training records.
Online support
Approaches that guide online work
Dr. Dier-Zimmermann uses Existential therapy to help people look at meaning, choice, and how they want to live. That approach is useful when someone feels stuck, questions values, or faces big life transitions.She also uses Acceptance and Commitment Therapy (ACT) to help people notice thoughts and feelings without getting stuck in them, then take actions that fit their values. ACT often helps with anxiety, depression, and coping with ongoing stress.
Attachment-based ideas shape how she looks at relationship patterns and emotional responses. This perspective helps people who want clearer boundaries, more supported closeness, or better ways to repair connection after conflict.
Finding the right approach is a shared process. She will work with each person to decide which ideas to try first and adjust the plan as goals and circumstances change. The first few sessions focus on assessment and planning so therapy matches what matters to the individual.
Online sessions are offered by video calls, phone, live chat, or text-based messaging to fit different needs. Video lets people read body language and have a fuller conversation. Phone can be easier when bandwidth is limited. Live chat or messaging can work for brief check-ins or when scheduling a longer session is difficult. These options provide flexibility so therapy can fit into busy routines and changing schedules.
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Questions people ask
What kinds of problems does she help with?
She works with stress, anxiety, depression, grief, trauma and relationship difficulties, among many other concerns listed in her specialties.
How would you describe her style in sessions?
She listens closely and treats people with respect. Sessions focus on clear assessment, honest conversation, and practical steps tied to a person’s values.
What is her professional background?
She has 35 years of experience as a clinician and brings training in religion, spirituality, and psychology to integrate beliefs and life context into therapy.
Where is she based and what credential does she hold?
She practices in Illinois and holds the LCPC credential, listed as IL LCPC.
Can sessions be conducted in other languages or internationally?
Sessions are offered in English and she does not accept international clients at this time.
What session formats are available?
She offers video calls, phone sessions, live chat, and text-based messaging to suit different needs and schedules.
How is cost handled for sessions?
Cost varies with location and therapist availability and sessions use a subscription model that can be canceled at any time.
How do I begin working with her?
Choose the Start Therapy button, complete a short matching questionnaire, and then schedule based on therapist availability.
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