NPIMap

Individual provider Active NPI

Robin F Mercer, PA-C

  • Physician Assistant
  • Stanford, CA
National Provider Identifier
1346592227
Registry record updated Dec 23, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
PA22528 Issued in CA
Practice address
300 Pasteur Dr
Stanford, CA 94305-2200
Phone
(650) 723-4000
NPI assigned
Oct 3, 2012
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 23, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Surgical Physician Assistant 363AS0400X 22528 CA
Physician Assistant 363A00000X PA22528 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 identifiers 1

IdentifierTypeStateIssuer
22528OtherCAMEDICAL LICENSE

Other names 1

  • Robin F Fuessenich Former 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
I20121203000473 CA Practitioner - Physician Assistant 2567614258 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2012
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)

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

5555 W Las Positas Blvd
Pleasanton, CA 94588-4000
Phone (925) 847-3000

5725 W Las Positas Blvd
Pleasanton, CA 94588-4007

Hospital & facility affiliations

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

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
22528CAMDProfessional Counselor

Practice roles

OrganizationSpecialtyStatusNew patients
Stanford Health Care CurrentSince Jun 24, 2020 Accepting new patients
Stanford Health Care CurrentSince Jun 24, 2020 Accepting new patients
Webster Orthopaedic Medical Group, a Professional Corporation CurrentSince Oct 1, 2012 Accepting new patients
San Francisco Physicians International Medical Group, Inc Physician Assistant Past Accepting new patients

Locations

4000 Dublin Blvd
Ste 100
Dublin, CA 94568
Phone (800) 943-8099

1133 E Stanley Blvd
Ste 111
Livermore, CA 94550
Phone (925) 371-5377

7999 Gateway Blvd
Ste 200
Newark, CA 94560
Phone (510) 806-2947

80 Grand Ave
Ste 400
Oakland, CA 94612
Phone (510) 238-1200

200 Porter Dr
Ste 215
San Ramon, CA 94583
Phone (925) 362-2166

200 Porter Dr
Ste 101
San Ramon, CA 94583
Phone (925) 838-1440

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

Interoperability endpoints

  • Direct secure messaging: rmercer208628@direct.stanfordhealthcare.org

Organizations & group practices 5

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 11

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": "1349222400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766448000000",
    "number": "1346592227",
    "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": "MERCER",
        "first_name": "ROBIN",
        "middle_name": "F",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2012-10-03",
        "last_updated": "2025-12-23",
        "certification_date": "2025-12-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363AS0400X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Surgical",
            "state": "CA",
            "license": "22528",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA22528",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICAL LICENSE",
            "identifier": "22528",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "ROBIN",
            "last_name": "FUESSENICH",
            "middle_name": "F",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Stanford, CA

Sources for this page

Verify at the official NPI Registry.