Hei Ieong Lou, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

1226155 Issued in CA

Practice address

525 South Dr Ste 211
Mountain View, CA 94040-4211

Phone

(408) 495-5770

Fax

(650) 912-1129

NPI assigned

Oct 3, 2024

Sex

Male

Sole proprietor

Yes

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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Physician Assistant

Education

University of California, Davis School of Medicine, 2024

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Patricia Sitnitsky PCGroup PAC ID 0446619852, 11 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• El Camino Health Hospital, Mountain View, CA, CCN 050308

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Interoperability endpoints

• Direct secure messaging: heiieong.lou@601886991843332.direct.elationemr.com

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.

• Patricia Sitnitsky PC

  • Internal Medicine Physician
  • Los Altos, CA
  • NPI 1265121669
  Medicare reassignment Care Compare group

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

• El Camino Hospital

  • General Acute Care Hospital
  • Mountain View, CA
  • NPI 1093712374
  Care Compare affiliation
• El Camino Hospital

  • General Acute Care Hospital
  • Los Gatos, CA
  • NPI 1417199340
  Care Compare affiliation
• El Camino Hospital

  • General Acute Care Hospital
  • Los Gatos, CA
  • NPI 1457594087
  Care Compare affiliation

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

{
    "created_epoch": "1727913600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748476800000",
    "number": "1225857642",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "827 ALTOS OAKS DR STE 4",
            "city": "LOS ALTOS",
            "state": "CA",
            "postal_code": "940245490",
            "telephone_number": "408-495-5770",
            "fax_number": "650-912-1129"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "525 SOUTH DR STE 211",
            "city": "MOUNTAIN VIEW",
            "state": "CA",
            "postal_code": "940404211",
            "telephone_number": "408-495-5770",
            "fax_number": "650-912-1129"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LOU",
        "first_name": "HEI IEONG",
        "name_prefix": "Mr.",
        "credential": "PA-C",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2024-10-03",
        "last_updated": "2025-05-29",
        "certification_date": "2025-05-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "1226155",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Los Altos Neurology
• Los Altos Pharmacy at El Camino Hospital
• Joanna Losito, NP
• Katayoun Lotfi, MD
• Emily Christine Lou, PT
• Wei Lou, L.A.C
• Evette Louhisdon
• Audrey V Louie, O.D.
• Jamie Louie, PA
• Robin L Love, LCSW,CADC II

• Physician Assistant in Mountain View, CA
• Providers in Mountain View, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 29, 2025; 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.