Allison Margaret Herzfeld, MD, PHD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

87330-20 Issued in WI

Practice address

600 Highland Ave
Madison, WI 53792-0001

Phone

(608) 263-6400

NPI assigned

Apr 3, 2023

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 NC

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

State licenses

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

{
    "created_epoch": "1680480000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781049600000",
    "number": "1639874423",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "600 HIGHLAND AVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537920001",
            "telephone_number": "608-263-6400"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 HIGHLAND AVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537920001",
            "telephone_number": "608-263-6400"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HERZFELD",
        "first_name": "ALLISON",
        "middle_name": "MARGARET",
        "name_prefix": "Dr.",
        "credential": "MD, PHD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-04-03",
        "last_updated": "2026-06-10",
        "certification_date": "2026-06-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WI",
            "license": "87330-20",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jamie Lynn Herron
• Abdikafi Elmi Hersi
• Josie Ann Herson, RN
• Taya Herum, MSW, LCSW
• Gordon I Herz, PHD
• Abigail Herzog, MD
• Aaron Stansbury Hess, MD, PHD
• Jamie Michelle Hess, M.D.
• Madelyn Hess, PA
• Amanda Hesse, RD

• Internal Medicine Physician in Madison, WI
• Providers in Madison, WI by specialty
• Internal Medicine Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 10, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.