NPIMap

Individual provider Active NPI

Carol Weichi Chen, MD

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Stanford, CA
National Provider Identifier
1700147030
Registry record updated Jul 7, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianTaxonomy code 208G00000X
License
A160709 Issued in CA
Practice address
300 Pasteur Dr
Stanford, CA 94305-2200
Phone
(650) 723-4000
Fax
(650) 736-0901
NPI assigned
Jun 4, 2012
Last updated
Jul 7, 2025By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 7, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Transplant Surgery Physician 204F00000X 4301511111 MI
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X 4301511111 MI
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X A160709 CA Primary

Addresses

Primary practice location

300 Pasteur Dr
Stanford, CA 94305-2200

Mailing address

300 Pasteur Dr
Stanford, CA 94305-2200
Phone (650) 723-4000

Other practice location 1

221 Michigan St NE Ste 300
Grand Rapids, MI 49503-2537
Phone (616) 459-7258

Other practice location 2

500 Pasteur Dr
Palo Alto, CA 94304-1048
Phone (650) 723-4000

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20230215000102 CA Practitioner - Cardiac SurgeryPractitioner - Thoracic SurgeryPractitioner - Vascular Surgery 3779892401 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Cardiac SurgeryAlso: Thoracic Surgery, Vascular Surgery
Education
Other, 2012
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Dignity Health Medical FoundationGroup PAC ID 7810800661, 1,211 clinicians
Stanford Health CareGroup PAC ID 6709797491, 3,152 clinicians

Practice addresses (Care Compare)

2900 Whipple Ave
Suite 140
Redwood City, CA 94062-2844
Phone (650) 261-2366

300 Pasteur Dr
Stanford, CA 94305-2200
Phone (650) 723-4000

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Coronary artery bypass graft (CABG)12

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
4301511111MIMDTransplant Surgery Physician
A160709CAMDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Stanford Health Care CurrentSince Feb 1, 2023 Accepting new patients
Dignity Health Medical Foundation CurrentSince Jul 7, 2025 Accepting new patients
County of Santa Clara CurrentSince Jul 27, 2023 Accepting new patients
LPCH Medical Group Div of Lucile CurrentSince Feb 1, 2023 Accepting new patients
Stanford Health Care Surgery Current Accepting new patients
County of Santa Clara Current Accepting new patients
Dignity Health Medical Foundation Current Accepting new patients
Stanford Health Care CurrentSince Feb 1, 2023 Accepting new patients
County of Santa Clara CurrentSince Jul 27, 2023 Accepting new patients
Dignity Health Medical Foundation CurrentSince Jul 7, 2025 Accepting new patients
Spectrum Health Hospitals Past Accepting new patients

Locations

1301 Shoreway Rd
Ste 100
Belmont, CA 94002
Phone (650) 596-7000

7475 Camino Arroyo
Gilroy, CA 95020
Phone (408) 852-2400

300 Pasteur Dr
Palo Alto, CA 94304
Phone (650) 723-6469

725 Welch Rd
Palo Alto, CA 94304
Phone (650) 497-8979

2900 Whipple Ave
Ste 140
Redwood City, CA 94062
Phone (650) 261-2366

1993 McKee Rd
San Jose, CA 95116
Phone (408) 254-6320

500 Tully Rd
San Jose, CA 95111
Phone (408) 817-1433

750 S Bascom Ave
San Jose, CA 95128
Phone (408) 885-2320

751 S Bascom Ave
San Jose, CA 95128
Phone (408) 885-5110

300 Pasteur Dr
Stanford, CA 94305
Phone (650) 498-5710

660 S Fair Oaks Ave
Sunnyvale, CA 94086
Phone (408) 885-7366

Interoperability endpoints

  • Direct secure messaging: cchen137329@santaclaravalley.direct-ci.net
  • Direct secure messaging: cchen247127@direct.stanfordhealthcare.org

Organizations & group practices 11

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 8

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1338768000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751846400000",
    "number": "1700147030",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR",
            "city": "STANFORD",
            "state": "CA",
            "postal_code": "943052200",
            "telephone_number": "650-723-4000",
            "fax_number": "650-736-0901"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR",
            "city": "STANFORD",
            "state": "CA",
            "postal_code": "943052200",
            "telephone_number": "650-723-4000",
            "fax_number": "650-736-0901"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "221 Michigan St NE Ste 300",
            "address_purpose": "LOCATION",
            "city": "Grand Rapids",
            "state": "MI",
            "postal_code": "495032537",
            "country_code": "US",
            "telephone_number": "616-459-7258",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "500 Pasteur Dr",
            "address_purpose": "LOCATION",
            "city": "Palo Alto",
            "state": "CA",
            "postal_code": "943041048",
            "country_code": "US",
            "telephone_number": "650-723-4000",
            "fax_number": "650-736-0901",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CHEN",
        "first_name": "CAROL",
        "middle_name": "WEICHI",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2012-06-04",
        "last_updated": "2025-07-07",
        "certification_date": "2025-07-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "204F00000X",
            "taxonomy_group": "",
            "desc": "Transplant Surgery",
            "state": "MI",
            "license": "4301511111",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "MI",
            "license": "4301511111",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "CA",
            "license": "A160709",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Stanford, CA

Sources for this page

Verify at the official NPI Registry.