Ryan David Guerrettaz, MD

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

81491-20 Issued in WI

Practice address

8701 Watertown Plank Rd
Milwaukee, WI 53226-3548

Phone

(414) 955-4575

NPI assigned

Mar 19, 2019

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rguerrettaz101981@direct.luhs.org

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.

• Loyola University Medical Center

  • General Acute Care Hospital
  • Maywood, IL
  • NPI 1376521575
  NPD

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

{
    "created_epoch": "1552953600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1687737600000",
    "number": "1861951725",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8701 WATERTOWN PLANK RD",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532263548"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8701 WATERTOWN PLANK RD",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532263548",
            "telephone_number": "414-955-4575"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUERRETTAZ",
        "first_name": "RYAN",
        "middle_name": "DAVID",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-03-19",
        "last_updated": "2023-06-26",
        "certification_date": "2023-06-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "125.074606",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "WI",
            "license": "81491-20",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Paul J Guenveur, OD
• David J Guerard, APNP
• Lupita Guerra, PA-C
• Juan Guerrero Hernandez
• Anna M Guerrero, MSN, PMHNP-BC, APNP
• Guest House of Milwaukee Inc
• David Joel Guetzkow, LPC-IT, MAC
• Adriana Guevara, D.D.S.
• Lauren Guglielmi, MS OTR/L
• Malini Guha Majumder, MD

• Pediatric Hematology & Oncology Physician in Milwaukee, WI
• Providers in Milwaukee, WI by specialty
• Pediatric Hematology & Oncology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 26, 2023; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.