NPIMap

Individual provider Active NPI

William Hiesinger, MD

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Palo Alto, CA
National Provider Identifier
1093913667
Registry record updated Apr 27, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianTaxonomy code 208G00000X
License
A141989 Issued in CA
Practice address
300 Pasteur Dr
Palo Alto, CA 94304-2203
Phone
(650) 723-4000
NPI assigned
Jul 5, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 27, 2024

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Surgery Physician 208600000X MT191341 PA
Surgery Physician 208600000X A141989 CA
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X A141989 CA Primary

Addresses

Primary practice location

300 Pasteur Dr
Palo Alto, CA 94304-2203

Mailing address

300 Pasteur Dr Ste 100
Palo Alto, CA 94304-2203
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
I20160928000731 CA Practitioner - Thoracic Surgery 4486941804 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Thoracic Surgery
Education
Perelman School of Med at the University of Pennsylvania, 2007
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Stanford Health CareGroup PAC ID 6709797491, 3,152 clinicians

Practice addresses (Care Compare)

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

Hospital & facility affiliations

  • Stanford Health Care Hospital, Stanford, CA, CCN 050441

Merit-based Incentive Payment System (MIPS)

Final score
88.53 of 100Reported as group
Quality
87.08
Promoting interoperability
100
Improvement activities
40
Cost
69.51

Procedures performed for Medicare patients

ProcedureNumber of procedures
Coronary artery bypass graft (CABG)1-10
Removal of tissue1-10

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
141989CAMDMarriage & Family Therapist
A141989CAMDSurgery Physician
MT191341PAMDSurgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Dignity Health Medical Foundation CurrentSince Mar 21, 2025 Accepting new patients
Dignity Health Medical Foundation CurrentSince Mar 21, 2025 Accepting new patients
Stanford Health Care CurrentSince Jul 20, 2016 Accepting new patients
Dignity Health Medical Foundation Current Accepting new patients
Stanford Health Care Surgery Current Accepting new patients
Stanford Health Care CurrentSince Jul 20, 2016 Accepting new patients
LPCH Medical Group Div of Lucile Past Accepting new patients
Albany General Hospital Past Accepting new patients
Stanford Hospital and Clinics Past Accepting new patients
Lucile Salter Packard Children'S Hospital at Stanford Past Accepting new patients
Sequoia Health Services Past Accepting new patients

Locations

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

1804 Embarcadero Rd
Ste 100
Palo Alto, CA 94303
Phone (650) 497-9067

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

300 Pasteur Dr
Ste 100
Palo Alto, CA 94304

5565 W Las Positas Blvd
Ste 320
Pleasanton, CA 94588
Phone (925) 460-0454

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

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

Interoperability endpoints

  • Direct secure messaging: whiesinger164820@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 and National Provider Directory roles.

Hospital & facility affiliations 7

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": "1183593600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1714176000000",
    "number": "1093913667",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR STE 100",
            "city": "PALO ALTO",
            "state": "CA",
            "postal_code": "943042203",
            "telephone_number": "650-723-4000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 PASTEUR DR",
            "city": "PALO ALTO",
            "state": "CA",
            "postal_code": "943042203",
            "telephone_number": "650-723-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HIESINGER",
        "first_name": "WILLIAM",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-07-05",
        "last_updated": "2024-04-27",
        "certification_date": "2024-04-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "PA",
            "license": "MT191341",
            "primary": false
        },
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "CA",
            "license": "A141989",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "CA",
            "license": "A141989",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Palo Alto, CA

Sources for this page

Verify at the official NPI Registry.