OrganizationActive
Williamtennantdds/Williamgiannidds
NPI 1023283025 · General Practice Dentistry · Berkeley, CA
Williamtennantdds/Williamgiannidds is a General Practice Dentistry organization in Berkeley, CA (NPI 1023283025).
Provider details
- NPI number
- 1023283025
- Entity type
- Organization
- Primary specialty
- General Practice DentistryDental Providers
- Organization subpart
- No
- Authorized official
- William Gianni, Partner(510) 848-3143
- License
- 23247 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
Detailed profile(87/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
2999 Regent St
Suite 714
Berkeley, CA 94705-2146
Phone: (510) 848-3143
Fax: (510) 848-2522
Street-level locationGet directions
Mailing address
2999 Regent St
Berkeley, CA 94705-2146
Other names (DBA / former)
- Other name
- Williamtennantdds and Williamgiannidds
Registry dates
- Enumerated
- 2008-04-30
- Last updated
- 2008-04-30
Frequently asked questions
- What is Williamtennantdds/Williamgiannidds's NPI number?
- Williamtennantdds/Williamgiannidds's National Provider Identifier (NPI) is 1023283025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Williamtennantdds/Williamgiannidds?
- Williamtennantdds/Williamgiannidds is classified in the NPPES registry as General Practice Dentistry (Dental Providers).
- Where is Williamtennantdds/Williamgiannidds located?
- Williamtennantdds/Williamgiannidds's practice location on file with NPPES is 2999 Regent St, Berkeley, CA 94705-2146.
- What is Williamtennantdds/Williamgiannidds's phone number?
- The practice phone number listed in the NPPES registry for Williamtennantdds/Williamgiannidds is (510) 848-3143.
- Who is the authorized official for Williamtennantdds/Williamgiannidds?
- The authorized official listed on Williamtennantdds/Williamgiannidds's NPPES record is William Gianni, Partner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Williamtennantdds/Williamgiannidds's NPI active?
- Yes — Williamtennantdds/Williamgiannidds's NPI (1023283025) is active in the NPPES registry as of the last update on 2008-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.