Chester Gregson
NPI 1073633731 · Marriage & Family Therapist · Ontario, CA
Chester Gregson is a Marriage & Family Therapist provider in Ontario, CA (NPI 1073633731).
Provider details
- NPI number
- 1073633731
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 38663 (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
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
- 2007-03-29
- Last updated
- 2025-08-04
- Certified
- 2025-08-04
Frequently asked questions
- What is Chester Gregson's NPI number?
- Chester Gregson's National Provider Identifier (NPI) is 1073633731, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chester Gregson's specialty?
- Chester Gregson is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Chester Gregson located?
- Chester Gregson's practice location on file with NPPES is 3200 E Guasti Rd, Ontario, CA 91761-8660.
- What is Chester Gregson's phone number?
- The practice phone number listed in the NPPES registry for Chester Gregson is (619) 639-9730.
- Is Chester Gregson's NPI active?
- Yes — Chester Gregson's NPI (1073633731) is active in the NPPES registry as of the last update on 2025-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.