Active NPI
Arnold Bruce Gelb, M.D.
- Anatomic Pathology & Clinical Pathology Physician
- Brisbane, CA
National Provider Identifier
1447556352
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Anatomic Pathology & Clinical Pathology Physician
- License
- G64044
- Practice address
- 1000 Sierra Point Pkwy
Brisbane, CA 94005-1804 - Phone
- (415) 450-1932
- Fax
- (415) 728-9893
- NPI assigned
- Feb 10, 2011
- Reactivated
- Feb 12, 2021
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Anatomic Pathology & Clinical Pathology Physician | 207ZP0102X | G64044 | CA | Primary |
Addresses
Primary practice location
1000 Sierra Point Pkwy
Brisbane, CA 94005-1804
Mailing address
PO Box 2202
Mill Valley, CA 94942-2202
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
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| G64044 | CA | MD | Anatomic Pathology & Clinical Pathology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Theranos, Inc | 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.
-
- Clinical Medical Laboratory
- Palo Alto, CA
- NPI 1548546401
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1297296000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1765324800000",
"number": "1447556352",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 2202",
"city": "MILL VALLEY",
"state": "CA",
"postal_code": "949422202"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1000 SIERRA POINT PKWY",
"city": "BRISBANE",
"state": "CA",
"postal_code": "940051804",
"telephone_number": "415-450-1932",
"fax_number": "415-728-9893"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GELB",
"first_name": "ARNOLD",
"middle_name": "BRUCE",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2011-02-10",
"last_updated": "2025-12-10",
"certification_date": "2025-12-10",
"deactivation_date": "2018-11-02",
"reactivation_date": "2021-02-12",
"status": "A"
},
"taxonomies": [
{
"code": "207ZP0102X",
"taxonomy_group": "",
"desc": "Pathology, Anatomic Pathology & Clinical Pathology",
"state": "CA",
"license": "G64044",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Brisbane, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 10, 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.