Active NPI
Alexandra Kristin Klein Bor, MD
- Anesthesiology Physician
- Palo Alto, CA
National Provider Identifier
1669935045
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Anesthesiology Physician
- License
- A182439
- Practice address
- 725 Welch Rd
Palo Alto, CA 94304-1601 - Phone
- (650) 497-8000
- NPI assigned
- Apr 11, 2019
- Sex
- Female
- Sole proprietor
- No
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 |
|---|---|---|---|---|
| Anesthesiology Physician | 207L00000X | A182439 | CA | Primary |
| Pediatric Anesthesiology Physician | 207LP3000X | A182439 | CA |
Addresses
Primary practice location
725 Welch Rd
Palo Alto, CA 94304-1601
Mailing address
725 Welch Rd
Palo Alto, CA 94304-1601
Phone (650) 497-8000
Other practice location 1
300 Pasteur Dr
Stanford, CA 94305-2200
Phone (650) 723-6661
Other names 1
- Alexandra Kristin Klein
Electronic endpoints 1
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| Direct Messaging Address | kleina@stanford.edu | Direct |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in CA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Anesthesiology
- Education
- University of Texas Medical School at Houston, 2019
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
300 Pasteur Dr
Stanford, CA 94305-2200
Phone (650) 723-4000
725 Welch Rd
Palo Alto, CA 94304-1601
Phone (650) 498-7200
Hospital & facility affiliations
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A182439 | CA | MD | Anesthesiology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Stanford Health Care | Current | Accepting new patients | |
| Stanford Health Care | Anesthesiology | Current | Accepting new patients |
| LPCH Medical Group Div of Lucile | Current | Accepting new patients |
Locations
725 Welch Rd
Palo Alto, CA 94304
Phone (650) 497-8979
300 Pasteur Dr
Stanford, CA 94305
Phone (650) 498-5710
Organizations & group practices 3
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.
-
- Children's Hospital
- Palo Alto, CA
- NPI 1417907940
-
- Specialty Pharmacy
- Mountain View, CA
- NPI 1760366132
Hospital & facility affiliations 7
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Emeryville, CA
- NPI 1275076325
-
- General Acute Care Hospital
- Emeryville, CA
- NPI 1285177337
-
- General Acute Care Hospital
- Stanford, CA
- NPI 1437292927
-
- General Acute Care Hospital
- Pleasanton, CA
- NPI 1467990465
-
- General Acute Care Hospital
- Stanford, CA
- NPI 1871543215
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1554940800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1779148800000",
"number": "1669935045",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "725 WELCH RD",
"city": "PALO ALTO",
"state": "CA",
"postal_code": "943041601",
"telephone_number": "650-497-8000"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "725 WELCH RD",
"city": "PALO ALTO",
"state": "CA",
"postal_code": "943041601",
"telephone_number": "650-497-8000"
}
],
"practiceLocations": [
{
"address_1": "300 Pasteur Dr",
"address_purpose": "LOCATION",
"city": "Stanford",
"state": "CA",
"postal_code": "943052200",
"country_code": "US",
"telephone_number": "650-723-6661",
"fax_number": "650-723-6661",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "BOR",
"first_name": "ALEXANDRA KRISTIN",
"middle_name": "KLEIN",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2019-04-11",
"last_updated": "2026-05-19",
"certification_date": "2026-05-19",
"status": "A"
},
"taxonomies": [
{
"code": "207L00000X",
"taxonomy_group": "",
"desc": "Anesthesiology",
"state": "CA",
"license": "A182439",
"primary": true
},
{
"code": "207LP3000X",
"taxonomy_group": "",
"desc": "Anesthesiology, Pediatric Anesthesiology",
"state": "CA",
"license": "A182439",
"primary": false
}
],
"identifiers": [],
"endpoints": [
{
"endpointType": "DIRECT",
"endpointTypeDescription": "Direct Messaging Address",
"endpoint": "kleina@stanford.edu",
"affiliation": "N",
"use": "DIRECT",
"useDescription": "Direct",
"contentType": "CSV",
"contentTypeDescription": "CSV",
"address_1": "300 Pasteur Dr",
"city": "Stanford",
"state": "CA",
"country_code": "US",
"postal_code": "943052200",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": [
{
"first_name": "ALEXANDRA",
"last_name": "KLEIN",
"middle_name": "KRISTIN",
"code": "1",
"type": "Former Name"
}
]
}Other providers in Palo Alto, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 19, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.