Dr. Michael A. Williston
- Gender: Male
- Experience: 10 years
- Sole propriator: No
- NPI: 1093090474
Dr. Michael A. Williston PSY.D.
Psychologist
He is located at 4000 Nexus Drive Suite Ne3-100 in Wilmington, DE 19803. Can help patients with the following: Gender Identity, Infidelity, Loss, Grief, and Bereavement, Posttraumatic Stress Disorder (PTSD), School Issues, Trauma. His National Provider Identifier (NPI) number is 1093090474. Appointment can be made via the phone number (302) 320-9771.
Conditions treated
Dr. Michael Andrew Williston, being an psychologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Michael A. Williston.
- Anger Management
- Anxiety
- Attention-Deficit/Hyperactivity Disorder (ADHD)
- Autism
- Bipolar Disorder
- Career Counseling
- Compassion Fatigue
- Depression
- Dyslexia
- EMDR
- Eating Disorder
- Emotional Eating
- Family Conflict
- Gender Identity
- Grief
- Infertility
- Infidelity
- Isolation
- Life Coaching
- Life Transitions
- Loss, Grief, and Bereavement
- Mental Illness
- Obesity
- Obsessive Compulsive Disorder (OCD)
- Online Therapy
- Parenting
- Posttraumatic Stress Disorder (PTSD)
- Relationship Issues
- School Issues
- Seasonal Affective Disorder (SAD)
- Self-Esteem
- Self-Harming
- Separation Anxiety Disorder
- Sleep Disorders
- Spirituality and Religion
- Stress
- Trauma
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Michael A. Williston as in-network for the following 2026 plans.
Health plans
Ambetter Health of Delaware
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 17 plans from Ambetter Health of Delaware
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Clear Gold | EPO · Gold | Preferred | Accepting new patients |
| Clear Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Complete Gold | EPO · Gold | Preferred | Accepting new patients |
| Complete Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Elite Silver | EPO · Silver | Preferred | Accepting new patients |
| Elite Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
| Everyday Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Focused Silver | EPO · Silver | Preferred | Accepting new patients |
| Focused Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
| Principal Bronze HSA | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Principal Bronze HSA + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Gold | EPO · Gold | Preferred | Accepting new patients |
| Standard Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Standard Silver | EPO · Silver | Preferred | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Michael A. Williston is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Michael A. Williston is enrolled to bill Medicare as a Practitioner - Clinical Psychologist .
Bills through: Christiana Care Health Services Inc
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Looking for more Psychologists?
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- Gender: Female
- Address: 1600 Rockland Road Wilmington, 19803, DE
- Gender: Female
- Address: 1600 Rockland Road Wilmington, 19803, DE
- Gender: Female
- Address: Suite 103 1521 Concord Pike Wilmington, 19803, DE
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- Address: 1801 Rockland Road Wilmington, 19803, DE
- Gender: Female
- Address: 1600 Rockland Road Wilmington, 19803, DE
- Gender: Female
- Address: 1600 Rockland Road Wilmington, 19803, DE
Questions & Answers
Does Dr. Michael Andrew Williston accept insurance?
Dr. Michael Andrew Williston is listed in-network for 17 ACA Marketplace (Obamacare/HealthCare.gov) plans from Ambetter Health of Delaware. See the Marketplace plans section for details.
Where can you meet with Dr. Michael Andrew Williston?
Dr. Michael Andrew Williston's office is located at 4000 Nexus Drive Suite Ne3-100 in Wilmington, DE 19803.
What conditions does Dr. Michael Andrew Williston treat?
Dr. Michael Andrew Williston provides treatment for Gender Identity, Infidelity, Loss, Grief, and Bereavement, Posttraumatic Stress Disorder (PTSD), School Issues, Trauma. For the full list see this list.