IndividualActive
William Nguyen, MA
NPI 1083778427 · Counselor · Vallejo, CA
William Nguyen, MA is a Counselor provider in Vallejo, CA (NPI 1083778427).
Provider details
- NPI number
- 1083778427
- Entity type
- Individual
- Primary specialty
- CounselorBehavioral Health & Social Service Providers
- Credential
- MA
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(83/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
83% 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
408 Tennessee St
Vallejo, CA 94590-4453
Phone: (707) 554-2397
Street-level locationGet directions
Mailing address
1533 Jackson St Apt 104
Oakland, CA 94612-4440
Registry dates
- Enumerated
- 2006-12-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Nguyen's NPI number?
- William Nguyen's National Provider Identifier (NPI) is 1083778427, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Nguyen's specialty?
- William Nguyen is listed in the NPPES registry with a primary specialty of Counselor (Behavioral Health & Social Service Providers).
- Where is William Nguyen located?
- William Nguyen's practice location on file with NPPES is 408 Tennessee St, Vallejo, CA 94590-4453.
- What is William Nguyen's phone number?
- The practice phone number listed in the NPPES registry for William Nguyen is (707) 554-2397.
- Is William Nguyen's NPI active?
- Yes — William Nguyen's NPI (1083778427) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.