Hannah O'Brien, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA58222 Issued in CA

Practice address

18 Spinnaker PL
Redwood City, CA 94065-1294

Phone

(925) 382-4824

NPI assigned

Feb 10, 2020

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other names 1

• Hannah Jessalyn Wall Other name

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

Merit-based Incentive Payment System (MIPS)

Final score

95.17 of 100Reported as group

Quality

86.93

Promoting interoperability

100

Improvement activities

40

Cost

72.6

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: hobrien59691@alamedahs.direct-ci.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.

• Alameda Health System

  • Surgery Physician
  • Oakland, CA
  • NPI 1740332931
  Medicare reassignment
• Alameda Health System

  dba Alameda Hospital Physicians - A Community Clinic

  • Clinic/Center
  • Alameda, CA
  • NPI 1124446158
  NPD
• Alameda Health System

  dba Newark Health Center

  • Federally Qualified Health Center (FQHC)
  • Newark, CA
  • NPI 1497956288
  NPD

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

{
    "created_epoch": "1581292800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779235200000",
    "number": "1780216598",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "18 SPINNAKER PL",
            "city": "REDWOOD CITY",
            "state": "CA",
            "postal_code": "940651294",
            "telephone_number": "925-382-4824"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18 SPINNAKER PL",
            "city": "REDWOOD CITY",
            "state": "CA",
            "postal_code": "940651294",
            "telephone_number": "925-382-4824"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "HANNAH",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-02-10",
        "last_updated": "2026-05-20",
        "certification_date": "2026-05-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA58222",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "HANNAH",
            "last_name": "WALL",
            "middle_name": "JESSALYN",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Soraya Nuno, R.N.
• Rhoda Nutik, MD
• Stephen L. Nutik, MD
• Michael T. Nwynn, MD
• Fabrice Nye, PH.D.
• Julianne O'Callahan, MD
• Caitlin O'Donnell
• James L. O'Donnell Jr., MD
• Julie Marie O'Keefe
• Sophie O'Shaughnessy, F.N.P

• Physician Assistant in Redwood City, CA
• Providers in Redwood City, 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 20, 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.