Jack Gregory, M.D.
NPI 1528169208 · General Practice Physician · Porterville, CA
Jack Gregory, M.D. is a General Practice Physician provider in Porterville, CA (NPI 1528169208).
Provider details
- NPI number
- 1528169208
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G7754 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-09-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Jack Gregory's NPI number?
- Jack Gregory's National Provider Identifier (NPI) is 1528169208, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jack Gregory's specialty?
- Jack Gregory is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Jack Gregory located?
- Jack Gregory's practice location on file with NPPES is 590 W Putnam Ave, Porterville, CA 93257-3257.
- What is Jack Gregory's phone number?
- The practice phone number listed in the NPPES registry for Jack Gregory is (559) 781-3700.
- Is Jack Gregory's NPI active?
- Yes — Jack Gregory's NPI (1528169208) 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.