Individual provider Active NPI

Nancy Y Tsai, M.D.

  • Neonatal-Perinatal Medicine Physician
  • Green Bay, WI
National Provider Identifier
1528277225
Registry record updated Jun 25, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neonatal-Perinatal Medicine PhysicianTaxonomy code 2080N0001X
License
55710-20 Issued in WI
Practice address
2845 Greenbrier Rd
Green Bay, WI 54311-6519
Phone
(920) 288-4560
Fax
(920) 288-4558
NPI assigned
May 21, 2007
Last updated
Jun 25, 2025By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 25, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Pediatrics Physician 208000000X 238495 MA
Pediatrics Physician 208000000X MD12613 RI
Neonatal-Perinatal Medicine Physician 2080N0001X 55710-20 WI Primary

Addresses

Primary practice location

2845 Greenbrier Rd
Green Bay, WI 54311-6519

Mailing address

PO Box 735044
Chicago, IL 60673-5044
Phone (800) 326-2250

Other practice location 1

1506 S Oneida St
Appleton, WI 54915-1305
Phone (920) 831-0505

Other identifiers 1

IdentifierTypeStateIssuer
100016094MedicaidWI

Electronic endpoints 2

TypeEndpointUseAffiliation
Direct Messaging Address ntsai148535@direct.myadvocateaurora.org Direct
FHIR URL https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI
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

Enrollment IDStateProvider typePAC IDDetails
I20150512001003 WI Practitioner - Pediatric MedicinePractitioner - Other (Physician) 5395064430 Reassigns benefits to 2 organizations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
238495MAMDPediatrics Physician
MD12613RIMDPediatrics Physician
55710-20WIMDNeonatal-Perinatal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Baycare Aurora, LLC CurrentSince May 11, 2015 Accepting new patients
Aurora Medical Group, Inc. CurrentSince May 11, 2015 Accepting new patients
Aurora Medical Group, Inc. Current Accepting new patients
Aurora Medical Group, Inc. CurrentSince May 11, 2015 Accepting new patients
Aurora Medical Group, Inc. Past Accepting new patients

Locations

2253 W Mason St
Green Bay, WI 54303
Phone (920) 327-7000

2845 Greenbrier Rd
Green Bay, WI 54311
Phone (920) 288-3388

1020 N 12th St
Milwaukee, WI 53233
Phone (414) 219-3056

3301 W Forest Home Ave
Milwaukee, WI 53215
Phone (414) 389-2233

Interoperability endpoints

  • Direct secure messaging: ntsai148535@direct.myadvocateaurora.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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

NPI Registry JSON

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

{
    "created_epoch": "1179705600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750809600000",
    "number": "1528277225",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 735044",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606735044",
            "telephone_number": "800-326-2250"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2845 GREENBRIER RD",
            "city": "GREEN BAY",
            "state": "WI",
            "postal_code": "543116519",
            "telephone_number": "920-288-4560",
            "fax_number": "920-288-4558"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1506 S Oneida St",
            "address_purpose": "LOCATION",
            "city": "Appleton",
            "state": "WI",
            "postal_code": "549151305",
            "country_code": "US",
            "telephone_number": "920-831-0505",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TSAI",
        "first_name": "NANCY",
        "middle_name": "Y",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-05-21",
        "last_updated": "2025-06-25",
        "certification_date": "2025-06-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "MA",
            "license": "238495",
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "RI",
            "license": "MD12613",
            "primary": false
        },
        {
            "code": "2080N0001X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Neonatal-Perinatal Medicine",
            "state": "WI",
            "license": "55710-20",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "100016094",
            "state": "WI"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "ntsai148535@direct.myadvocateaurora.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "2845 Greenbrier Rd",
            "city": "Green Bay",
            "state": "WI",
            "country_code": "US",
            "postal_code": "543116519",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "2845 Greenbrier Rd",
            "city": "Green Bay",
            "state": "WI",
            "country_code": "US",
            "postal_code": "543116519",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Green Bay, WI

Sources for this page

Verify at the official NPI Registry.