J Williamson, PH.D.
NPI 1649711052 · Clinical Psychologist · Davenport, IA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
J Williamson, PH.D. is a Clinical Psychologist provider in Davenport, IA (NPI 1649711052).
Provider details
- NPI number
- 1649711052
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 079307 (IA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Mailing address
Registry dates
- Enumerated
- 2017-03-17
- Last updated
- 2017-03-17
Frequently asked questions
- What is J Williamson's NPI number?
- J Williamson's National Provider Identifier (NPI) is 1649711052, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is J Williamson's specialty?
- J Williamson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is J Williamson located?
- J Williamson's practice location on file with NPPES is 2102 E 38th St, Davenport, IA 52807-1135.
- What is J Williamson's phone number?
- The practice phone number listed in the NPPES registry for J Williamson is (563) 359-4049.
- Does J Williamson accept Medicare?
- J Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is J Williamson's NPI active?
- Yes — J Williamson's NPI (1649711052) is active in the NPPES registry as of the last update on 2017-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.