Michael Andrew Williston, PsyD
- Affiliated sites
- 2
- Medical groups
- 2
- State licenses
- 2
- Year NPI issued
- 2011
- Practice locations
- 2
- Practice address
- 4000 Nexus Dr, Wilmington, DE 19803-3000
- Practice phone
- Call (302) 320-9771
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cchs My65 Office - Emergency & Hospital Medicine - Wilmington (Nexus Dr)
Primary care practice · Wilmington, Delaware
Find Michael Williston's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Michael Andrew Williston is a psychologist in Wilmington, Delaware
Michael Williston practices at Cchs My65 Office - Emergency & Hospital Medicine - Wilmington (Nexus Dr) in Wilmington, Delaware.
Michael Williston's NPI, 1093090474, was assigned on October 17, 2011. Michael Williston holds Delaware license B1-0011487.
- NPI
- 1093090474NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204074065
- NPI enumeration date
- October 17, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (302) 320-9771
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Michael Andrew Williston practices at 2 locations in Wilmington, Delaware
Michael Williston's primary practice is Cchs My65 Office - Emergency & Hospital Medicine - Wilmington (Nexus Dr), at 4000 Nexus Dr, Wilmington, DE 19803-3000. The practice phone is (302) 320-9771. The NPI Registry lists Michael Williston's practice address as 501 W 14th St, Wilmington, DE 19801.
- Cchs My65 Office - Emergency & Hospital Medicine - Wilmington (Nexus Dr)Primary4000 Nexus Dr, Wilmington, DE 19803-3000Phone(302) 320-9771
- NPI Registry address501 W 14th St, Wilmington, DE 19801 · New Castle County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Michael Andrew Williston is affiliated with 2 sites of care and 2 medical groups
Michael Williston's primary practice is Cchs My65 Office - Emergency & Hospital Medicine - Wilmington (Nexus Dr) in Wilmington, Delaware. The medical group on file is ChristianaCare. Dmand AI also links Michael Williston to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Michael Andrew Williston's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Michael Williston practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cchs My65 Office - Emergency & Hospital Medicine - Wilmington (Nexus Dr) | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Michael Andrew Williston is one of 53 psychologists in Delaware
Psychologist is Michael Williston's primary specialty in the NPI Registry, under taxonomy code 103T00000X. Dmand AI has Michael Williston's licenses on file in 2 states: Delaware and Pennsylvania.
Specialties and state licenses
- Psychologist, DelawarePrimary
- Pennsylvania license
Psychologists near Michael Williston
Counts of psychologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Michael Andrew Williston's patients have a median age of 38
Across all payers, Dmand AI patient panel data puts Michael Williston's median patient age at 38, with 63% women.
Michael Williston's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women63%
- Men37%
Source: Dmand AI Patient Panel Data
Michael Andrew Williston offers telehealth to Medicare patients
Michael Williston accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Michael Williston as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Michael Andrew Williston's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Michael Andrew Williston
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Michael Andrew Williston's NPI number?
Michael Andrew Williston's NPI number is 1093090474. It was assigned on October 17, 2011, and it is active in the NPI Registry.
What does Michael Andrew Williston specialize in?
Michael Andrew Williston is a psychologist in Wilmington, Delaware. The primary specialty in the NPI Registry is Psychologist (taxonomy code 103T00000X).
Where does Michael Andrew Williston practice?
Michael Williston practices at 4000 Nexus Dr, Wilmington, DE 19803-3000. Michael Williston also practices at 501 W 14th St, Wilmington, DE 19801. Michael Williston's primary practice is Cchs My65 Office - Emergency & Hospital Medicine - Wilmington (Nexus Dr) in Wilmington, Delaware. Dmand AI also links Michael Williston to 1 group practice or clinic and 1 medical group.
What is Michael Andrew Williston's office phone number?
The practice phone on file for Michael Williston is (302) 320-9771.
What is Michael Andrew Williston's medical license number?
Michael Williston holds Delaware license B1-0011487, one of the licenses on file in 2 states.
Which states has Michael Andrew Williston been licensed in?
Dmand AI has state licenses on file for Michael Williston in Delaware and Pennsylvania.
What medical group is Michael Andrew Williston part of?
Michael Williston is linked to ChristianaCare. Dmand AI links Michael Williston to 1 more medical group.
Does Michael Andrew Williston accept Medicare?
Yes. CMS lists Michael Williston as accepting Medicare assignment.
Does Michael Andrew Williston offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Michael Williston as offering telehealth services.
How long has Michael Andrew Williston been practicing?
Michael Williston graduated from medical school in 2011, 15 years ago.
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