Walter Gwang-Up Park, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

A88008 Issued in CA

Practice address

300 Pasteur Dr
Stanford, CA 94305-2200

Phone

(650) 723-4000

NPI assigned

Sep 21, 2007

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

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

Green means eligible to order or refer.

Enrollment records 1

Specialty

GastroenterologyAlso: Internal Medicine

Education

Johns Hopkins University School of Medicine, 2003

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Stanford Health CareGroup PAC ID 6709797491, 3,152 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Stanford Health Care Hospital, Stanford, CA, CCN 050441
• Stanford Health Care Tri-Valley Hospital, Pleasanton, CA, CCN 050283

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wpark1907@direct.stanfordhealthcare.org

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.

• Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1437292927
  Medicare reassignment Care Compare group NPD
• Stanford Health Care

  • Specialty Pharmacy
  • Mountain View, CA
  • NPI 1760366132
  NPD
• Lucile Salter Packard Children'S Hospital at Stanford

  • Children's Hospital
  • Palo Alto, CA
  • NPI 1467442749
  NPD (past)
• Stanford Hospital and Clinics

  • Clinical Medical Laboratory
  • Palo Alto, CA
  • NPI 1174698468
  NPD (past)

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

• Stanford Health Care

  • Radiation Oncology Physician
  • Pleasanton, CA
  • NPI 1124561758

  Hospital

  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Emeryville, CA
  • NPI 1275076325
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Emeryville, CA
  • NPI 1285177337
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1437292927
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Pleasanton, CA
  • NPI 1467990465
  Care Compare affiliation
• Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1871543215
  Care Compare affiliation
• Stanford Health Care Tri-Valley

  • General Acute Care Hospital
  • Pleasanton, CA
  • NPI 1144389941
  Care Compare affiliation
• Stanford Life Flight

  • Air Ambulance
  • Stanford, CA
  • NPI 1114063203

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1190332800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787529600000",
    "number": "1538355672",
    "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"
        },
        {
            "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"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "PARK",
        "first_name": "WALTER",
        "middle_name": "GWANG-UP",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-09-21",
        "last_updated": "2026-08-24",
        "certification_date": "2026-08-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "A88008",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Leeanne Park, M.D.
• Marn Joon Park, MD
• Peter Park, CRNA
• Shirley Park, MD
• Sijin Park, PA-C
• Leanne Garvie Parke, CRNA
• Bruce R Parker, M.D.
• William Alan Parker
• Gerneiva Parkinson, MD MHS
• Jessica Sonca Parkyn, PA-C

• Gastroenterology Physician in Stanford, CA
• Providers in Stanford, CA by specialty
• Gastroenterology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 24, 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.

Verify at the official NPI Registry.