Jeffrey Gregg, M.D.
NPI 1689657918 · Specialist · Sacramento, CA
Jeffrey Gregg, M.D. is a Specialist provider in Sacramento, CA (NPI 1689657918).
Provider details
- NPI number
- 1689657918
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- License
- G79883 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$65,127 across 62 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Jeffrey Gregg's NPI number?
- Jeffrey Gregg's National Provider Identifier (NPI) is 1689657918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeffrey Gregg's specialty?
- Jeffrey Gregg is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Jeffrey Gregg located?
- Jeffrey Gregg's practice location on file with NPPES is 4400 V St, Sacramento, CA 95817-1445.
- What is Jeffrey Gregg's phone number?
- The practice phone number listed in the NPPES registry for Jeffrey Gregg is (916) 734-2525.
- Is Jeffrey Gregg's NPI active?
- Yes — Jeffrey Gregg's NPI (1689657918) 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.