IndividualActive
Michael Williston, PSY.D.
NPI 1093090474 · Psychologist · Wilmington, DE
Provider details
- NPI number
- 1093090474
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- No
- License
- B1-0011487 (DE)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(85/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
4000 Nexus Dr Ste Ne3-100
Wilmington, DE 19803-3000
Phone: (302) 320-9771
Fax: (302) 623-7964
Approximate (ZIP-level) locationGet directions
Mailing address
112 N Broad St
Philadelphia, PA 19102-1512
Additional practice locations (1)
- 112 N Broad StPhiladelphia, PA 19102-1512Phone: (215) 568-0860
Registry dates
- Enumerated
- 2011-10-17
- Last updated
- 2025-01-13
- Certified
- 2025-01-13
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.