Active NPI
William R. Gianni, DDS
- Dentist
- Concord, CA
National Provider Identifier
1093823080
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Dentist
- License
- 43695
- Practice address
- 2975 Treat Blvd BLDG D
Concord, CA 94518-3601 - Phone
- (925) 788-5710
- NPI assigned
- Aug 29, 2006
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Dentist | 122300000X | 23247 | CA | |
| Dentist | 122300000X | 43695 | CA | Primary |
Addresses
Primary practice location
2975 Treat Blvd BLDG D
Concord, CA 94518-3601
Mailing address
2141 Dena Dr
Concord, CA 94519-2222
Phone (510) 848-3143
Other practice location 1
2999 Regent St
suite 714
Berkeley, CA 94705-2146
Phone (510) 848-3143
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 43695 | CA | MD | Dentist |
| 23247 | CA | MD | Speech-Language Pathologist |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Williamtennantdds/Williamgiannidds | Past | Accepting new patients |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- General Practice Dentistry
- Berkeley, CA
- NPI 1023283025
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1156809600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1738627200000",
"number": "1093823080",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "2141 DENA DR",
"city": "CONCORD",
"state": "CA",
"postal_code": "945192222",
"telephone_number": "510-848-3143",
"fax_number": "510-848-2522"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2975 TREAT BLVD BLDG D",
"city": "CONCORD",
"state": "CA",
"postal_code": "945183601",
"telephone_number": "925-788-5710"
}
],
"practiceLocations": [
{
"address_1": "2999 Regent St",
"address_2": "suite 714",
"address_purpose": "LOCATION",
"city": "Berkeley",
"state": "CA",
"postal_code": "947052146",
"country_code": "US",
"telephone_number": "510-848-3143",
"fax_number": "510-848-2522",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "GIANNI",
"first_name": "WILLIAM",
"middle_name": "R.",
"name_prefix": "Dr.",
"credential": "DDS",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2006-08-29",
"last_updated": "2025-02-04",
"certification_date": "2025-02-04",
"status": "A"
},
"taxonomies": [
{
"code": "122300000X",
"taxonomy_group": "",
"desc": "Dentist",
"state": "CA",
"license": "23247",
"primary": false
},
{
"code": "122300000X",
"taxonomy_group": "",
"desc": "Dentist",
"state": "CA",
"license": "43695",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Concord, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 4, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.