Eileen Hahn, PHYSICIAN ASSISTANT

Primary specialty

Physician AssistantTaxonomy code 363A00000X

Practice address

1399 Ygnacio Valley Rd Ste 11D
Walnut Creek, CA 94598-2874

Phone

(925) 357-9033

NPI assigned

Aug 25, 2025

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

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

Philadelphia College of Osteopathic Medicine, 2025

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

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.

• Bass Medical Group

  • Obstetrics & Gynecology Physician
  • Walnut Creek, CA
  • NPI 1174253405
  Medicare reassignment
• Bass Medical Group

  • Specialist
  • Walnut Creek, CA
  • NPI 1154401941
  NPD
• Bass Medical Group

  • Orthopaedic Surgery Physician
  • San Ramon, CA
  • NPI 1467329904
  NPD
• Bass Medical Group

  • Pain Medicine Physician
  • Visalia, CA
  • NPI 1326409343
  NPD (past)

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

{
    "created_epoch": "1756080000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756080000000",
    "number": "1861370264",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1154 LAKE POINT WAY",
            "city": "SUWANEE",
            "state": "GA",
            "postal_code": "300248485",
            "telephone_number": "678-577-4532"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1399 YGNACIO VALLEY RD STE 11D",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945982874",
            "telephone_number": "925-357-9033"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAHN",
        "first_name": "EILEEN",
        "credential": "PHYSICIAN ASSISTANT",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-08-25",
        "last_updated": "2025-08-25",
        "certification_date": "2025-08-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Julie A Hadley, RNFA
• Alexandra Morgan Hagerty
• Liann Nicole Hagey, M.D.
• Scot M. Hagey, MD
• Carolyn Hagspiel, BS
• Janet M. Hahn, MD
• Kirk A. Hahn, MD
• Paris Hahn
• Salma Haider, DPM
• Jasmine Hasmik Hajyan, LCSW

• Physician Assistant in Walnut Creek, CA
• Providers in Walnut Creek, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 25, 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.