William Shannon, PH.D.
NPI 1063668275 · Clinical Psychologist · Oakland, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Shannon, PH.D. is a Clinical Psychologist provider in Oakland, CA (NPI 1063668275).
Provider details
- NPI number
- 1063668275
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY22103 (CA)
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
17 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
- 2008-08-07
- Last updated
- 2024-09-27
- Certified
- 2024-09-27
Frequently asked questions
- What is William Shannon's NPI number?
- William Shannon's National Provider Identifier (NPI) is 1063668275, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Shannon's specialty?
- William Shannon is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is William Shannon located?
- William Shannon's practice location on file with NPPES is 625 16th St Unit 401, Oakland, CA 94612-2180.
- What is William Shannon's phone number?
- The practice phone number listed in the NPPES registry for William Shannon is (510) 290-6203.
- Does William Shannon accept Medicare?
- William Shannon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Shannon's NPI active?
- Yes — William Shannon's NPI (1063668275) is active in the NPPES registry as of the last update on 2024-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.