William Hookstra, M.A.
NPI 1639337132 · School Psychologist · Mohave Valley, AZ
William Hookstra, M.A. is a School Psychologist provider in Mohave Valley, AZ (NPI 1639337132).
Provider details
- NPI number
- 1639337132
- Entity type
- Individual
- Primary specialty
- School PsychologistBehavioral Health & Social Service Providers
- Credential
- M.A.
- Sex
- Male
- Sole proprietor
- No
- License
- 4013950 (AZ)
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
18 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
- 2008-05-30
- Last updated
- 2008-05-30
Frequently asked questions
- What is William Hookstra's NPI number?
- William Hookstra's National Provider Identifier (NPI) is 1639337132, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hookstra's specialty?
- William Hookstra is listed in the NPPES registry with a primary specialty of School Psychologist (Behavioral Health & Social Service Providers).
- Where is William Hookstra located?
- William Hookstra's practice location on file with NPPES is 8450 Olive Ave, Mohave Valley, AZ 86440-9214.
- What is William Hookstra's phone number?
- The practice phone number listed in the NPPES registry for William Hookstra is (928) 768-4538.
- Is William Hookstra's NPI active?
- Yes — William Hookstra's NPI (1639337132) is active in the NPPES registry as of the last update on 2008-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.