John Howell, PSY.D.
NPI 1740303163 · Clinical Psychologist · San Marcos, CA
John Howell, PSY.D. is a Clinical Psychologist provider in San Marcos, CA (NPI 1740303163).
Provider details
- NPI number
- 1740303163
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- No
- License
- PY00003532 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
19 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
- 2007-04-09
- Last updated
- 2025-03-17
- Certified
- 2025-03-17
Frequently asked questions
- What is John Howell's NPI number?
- John Howell's National Provider Identifier (NPI) is 1740303163, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Howell's specialty?
- John Howell is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is John Howell located?
- John Howell's practice location on file with NPPES is 333 South Twin Oaks Valley Road, San Marcos, CA 92096-4411.
- What is John Howell's phone number?
- The practice phone number listed in the NPPES registry for John Howell is (425) 281-4032.
- Is John Howell's NPI active?
- Yes — John Howell's NPI (1740303163) is active in the NPPES registry as of the last update on 2025-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.