William Haynes, PSYD
NPI 1366070633 · Clinical Psychologist · Saint Louis, MO
William Haynes, PSYD is a Clinical Psychologist provider in Saint Louis, MO (NPI 1366070633).
Provider details
- NPI number
- 1366070633
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2013040111 (MO)
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
6 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
- 2020-03-31
- Last updated
- 2020-08-18
- Certified
- 2020-08-18
Frequently asked questions
- What is William Haynes's NPI number?
- William Haynes's National Provider Identifier (NPI) is 1366070633, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Haynes's specialty?
- William Haynes is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is William Haynes located?
- William Haynes's practice location on file with NPPES is 2639 Miami St, Saint Louis, MO 63118-3929.
- What is William Haynes's phone number?
- The practice phone number listed in the NPPES registry for William Haynes is (314) 558-1112.
- Is William Haynes's NPI active?
- Yes — William Haynes's NPI (1366070633) is active in the NPPES registry as of the last update on 2020-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.