Robert Gregg, O.D.
NPI 1700921012 · Optometrist · Windsor, CA
Robert Gregg, O.D. is a Optometrist provider in Windsor, CA (NPI 1700921012).
Provider details
- NPI number
- 1700921012
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- OPT9899T (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 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.
$94 across 3 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
- 2007-02-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Robert Gregg's NPI number?
- Robert Gregg's National Provider Identifier (NPI) is 1700921012, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Gregg's specialty?
- Robert Gregg is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Robert Gregg located?
- Robert Gregg's practice location on file with NPPES is 820 Mcclelland Dr, Windsor, CA 95492-9572.
- What is Robert Gregg's phone number?
- The practice phone number listed in the NPPES registry for Robert Gregg is (707) 837-9000.
- Is Robert Gregg's NPI active?
- Yes — Robert Gregg's NPI (1700921012) 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.