Peter Williamson, PhD- Dean - WI

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Peter A. Williamson View my video

Peter A. Williamson, PhD

Schedule an Appointment

To schedule an appointment with Peter A. Williamson please call 608-294-6088.

Accepting new patients

  • DHS Provider


Year Joined SSM Health Medical Group:


  • Neuropsychology

Areas of Interest

I have retired from full-time practice in pediatric neuropsychology. Currently I provide neuropsychological screening within primary care (internal medicine and family practice) three days a week. This is the MAC (memory, attention, cognition) clinic and services adults ages 18 through 70. The target populations are those patients experiencing attention and concentration problems, memory difficulties or problems with thinking and problem solving. The MAC is a first step in the diagnostic process, when patients express concern or physicians first notice symptoms and need a bit more information. However, it is not a substitute for specialty neuropsychology. Patients with diagnosed brain disorders and dementia should be evaluated and followed by one of our adult neuropsychologists. The videos regarding child management are still available on the website.

Board Certification


Medical Interests

  • Attention and learning disorders
  • Autism
  • Behavior Therapy
  • Cerebral palsy
  • Developmental neuropsychology
  • Neurology/psychiatry interface


  • English

Dean Health Plan Product Type

  • Administrative Services/ASO
  • Badgercare Plus/Medicaid
  • Commercial HMO/POS Insurance (Group Or Individual Coverage)
  • Dean Focus
  • Medicare Advantage
  • Medicare Gold
  • Medicare Select
  • PPO


College and University

University of Wisconsin, Superior, WI, MS
University of North Dakota, Grand Forks, ND, PhD


Childrens Memorial Hospital, Chicago, IL


In addition to being a network provider for all Dean Health Plan insurance products listed above, this provider may also be considered in-network with various health insurance products.
- If Commercial HMO/POS Insurance (Group or Individual Coverage) appears under Dean Health Plan Product Type, this indicates this provider is participating in the Dean Health Plan Marketplace ( HMO plans.
- If Dean Focus appears under Dean Health Plan Product Type, this indicates this provider is participating in the Dean Health Plan Marketplace ( EPO plans.
- Dean providers are also participating providers for Medicare Part B, Wisconsin Medicaid, and other government payers. We encourage you to contact your insurance carrier to determine your coverage.

Hospital Affiliations



We encourage you to see your pediatrician, family medicine or internal medicine provider about new healthcare concerns. This provider will then direct you to the appropriate specialty care, as needed.

Office Information





DeanCare Gold (Cost) is an HMO plan with a Medicare contract.  Enrollment in DeanCare Gold depends on contract renewal.

H5264_WEB15v1_CMS Pending

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Customer Care

To schedule an appointment with a provider, please call the clinic directly.

If you have any questions contact Dean Health Plan's Customer Care Center at (800) 279-1301.
(For ASO members, please contact Dean Health Plan’s Customer Care Center at (877) 593-2872.)

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Call DeanDirect to make a referral - (888) 302-3326

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