NPIMap

Individual provider Active NPI

Ma Hazelene Merluza Pareja, PA-C

  • Physician Assistant
  • Stanford, CA
National Provider Identifier
1427786276
Registry record updated Nov 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
61658 Issued in CA
Practice address
300 Pasteur Dr
Stanford, CA 94305-2200
Phone
(650) 723-4000
NPI assigned
Aug 10, 2022
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 11, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X 61658 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

2900 Whipple Ave Ste 132
Redwood City, CA 94062-2844
Phone (650) 306-1016

Other names 1

  • Hazelene Merluza Other name

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
I20230106000394 CA Practitioner - Physician Assistant 1456721547 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2022
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
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)

1301 Shoreway Rd
Suite 100
Belmont, CA 94002-4110
Phone (650) 596-7000

2585 Samaritan Dr
San Jose, CA 95124-4107
Phone (650) 723-4000

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

Hospital & facility affiliations

  • Stanford Health Care Hospital, Stanford, CA, CCN 050441
  • Sequoia Hospital Hospital, Redwood City, CA, CCN 050197

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

State licenses

LicenseStateTypeSpecialty
61658CAMDPhysician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Stanford Health Care CurrentSince Jul 18, 2025 Accepting new patients
Dignity Health Medical Foundation CurrentSince May 12, 2025 Accepting new patients
Stanford Health Care CurrentSince Jul 18, 2025 Accepting new patients
Sequoia Health Services Past Accepting new patients
Stanford Hospital and Clinics Past Accepting new patients

Locations

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

2900 Whipple Ave
Ste 132
Redwood City, CA 94062
Phone (650) 306-1016

3400 Data Dr
Rncho Cordova, CA 95670
Phone (916) 379-2726

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

Organizations & group practices 8

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 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": "1660089600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762819200000",
    "number": "1427786276",
    "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": [
        {
            "address_1": "2900 Whipple Ave Ste 132",
            "address_purpose": "LOCATION",
            "city": "Redwood City",
            "state": "CA",
            "postal_code": "940622844",
            "country_code": "US",
            "telephone_number": "650-306-1016",
            "fax_number": "650-216-9403",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "PAREJA",
        "first_name": "MA HAZELENE",
        "middle_name": "MERLUZA",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2022-08-10",
        "last_updated": "2025-11-11",
        "certification_date": "2025-11-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "61658",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "HAZELENE",
            "last_name": "MERLUZA",
            "credential": "PA-C",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

Other providers in Stanford, CA

Sources for this page

Verify at the official NPI Registry.