Individual provider Active NPI

Holly J Wiesehan, ACNP

  • Gerontology Nurse Practitioner
  • Saint Louis, MO
National Provider Identifier
1609260116
Registry record updated Sep 2, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gerontology Nurse PractitionerTaxonomy code 363LG0600X
License
2015006317 Issued in MO
Practice address
1020 N Mason Rd
Div Im Cardiology, Ste 100
Saint Louis, MO 63141-6666
Phone
(314) 362-1291
Fax
(314) 996-3268
NPI assigned
Mar 23, 2015
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 2, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Gerontology Nurse Practitioner 363LG0600X 2015006317 MO Primary

Addresses

Primary practice location

1020 N Mason Rd
Div Im Cardiology, Ste 100
Saint Louis, MO 63141-6666

Mailing address

PO Box 7412011
Chicago, IL 60674-2011
Phone (314) 362-1291

Electronic endpoints 1

TypeEndpointUseAffiliation
FHIR URL https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/ Washington University

Medicare participation

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

Enrollment IDStateProvider typePAC IDDetails
I20150608000293 MO Practitioner - Nurse Practitioner 4981925609 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2014
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
SSM Medical Group IncGroup PAC ID 6608776299, 565 clinicians
Washington UniversityGroup PAC ID 9830008770, 2,968 clinicians

Practice addresses (Care Compare)

1011 Bowles Ave
Suite G50
Fenton, MO 63026-0562
Phone (636) 496-4600

1020 N Mason Rd
Suite 210
Saint Louis, MO 63141-6300
Phone (314) 362-1291

Hospital & facility affiliations

  • SSM Health St Mary'S Hospital - St Louis Hospital, Saint Louis, MO, CCN 260091
  • SSM St Clare Health Center Hospital, Fenton, MO, CCN 260081

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

State licenses

LicenseStateTypeSpecialty
2015006317MOMDGerontology Nurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Washington University CurrentSince Nov 21, 2018 Accepting new patients
Washington University CurrentSince Nov 21, 2018 Accepting new patients
SSM Health Care St. Louis Past Accepting new patients
Washington University Past Accepting new patients

Locations

1418 Cross St
Ste 180
Shiloh, IL 62269
Phone (618) 607-1340

4500 Memorial Dr
Swansea, IL 62226
Phone (618) 233-7750

1011 Bowles Ave
Ste G50
Fenton, MO 63026
Phone (636) 496-4600

1020 N Mason Rd
Ste 100
Saint Louis, MO 63141
Phone (314) 996-3295

5201 Mid America Plz
Ste 2300
Saint Louis, MO 63129
Phone (314) 996-8670

1 Barnes Hospital Plz
Saint Louis, MO 63110
Phone (314) 362-9170

4921 Parkview Pl
Ste 7B
Saint Louis, MO 63110
Phone (314) 362-7216

660 S Euclid Ave
Saint Louis, MO 63110

1020 N Mason Rd
Ste 210
Saint Louis, MO 63141
Phone (314) 996-3162

1234 S Kingshighway Blvd
Ste 1100
Saint Louis, MO 63110

8 Millstone Campus Dr
Saint Louis, MO 63146
Phone (314) 273-4375

660 S Euclid Ave
#8126
Saint Louis, MO 63110
Phone (314) 362-8351

4921 Parkview Pl
Fl 7
Saint Louis, MO 63110
Phone (314) 362-6908

Interoperability endpoints

  • Direct secure messaging: hwiesehan508026@direct-ehr-ssmhc.com

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 and National Provider Directory roles.

Hospital & facility affiliations 3

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1427068800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756771200000",
    "number": "1609260116",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7412011",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606742011",
            "telephone_number": "314-362-1291",
            "fax_number": "314-996-3268"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1020 N MASON RD",
            "address_2": "DIV IM CARDIOLOGY, STE 100",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631416666",
            "telephone_number": "314-362-1291",
            "fax_number": "314-996-3268"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WIESEHAN",
        "first_name": "HOLLY",
        "middle_name": "J",
        "name_prefix": "Mrs.",
        "credential": "ACNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2015-03-23",
        "last_updated": "2025-09-02",
        "certification_date": "2025-08-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LG0600X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Gerontology",
            "state": "MO",
            "license": "2015006317",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "affiliationName": "Washington University",
            "address_1": "1020 N Mason Rd",
            "address_2": "Div IM Cardiology, Ste 100",
            "city": "Saint Louis",
            "state": "MO",
            "country_code": "US",
            "postal_code": "631416666",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Saint Louis, MO

Sources for this page

Verify at the official NPI Registry.