IndividualActive
Gary Maas, O.D.
NPI 1003960048 · Optometrist · Vallejo, CA
Gary Maas, O.D. is a Optometrist provider in Vallejo, CA (NPI 1003960048).
Provider details
- NPI number
- 1003960048
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- OPT5904T (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Detailed profile(90/100 index)
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
675 Sereno Dr.
Vallejo, CA 94589
Phone: (707) 651-2990
Fax: (707) 651-2948
Street-level locationGet directions
Mailing address
975 Sereno Dr
Vallejo, CA 94589-2441
Registry dates
- Enumerated
- 2007-01-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gary Maas's NPI number?
- Gary Maas's National Provider Identifier (NPI) is 1003960048, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Maas's specialty?
- Gary Maas is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Gary Maas located?
- Gary Maas's practice location on file with NPPES is 675 Sereno Dr., Vallejo, CA 94589.
- What is Gary Maas's phone number?
- The practice phone number listed in the NPPES registry for Gary Maas is (707) 651-2990.
- Is Gary Maas's NPI active?
- Yes — Gary Maas's NPI (1003960048) 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.