Individual provider Active NPI

Hillary Ann Gerling, PA

  • Physician Assistant
  • Saint Louis, MO
National Provider Identifier
1861768905
Registry record updated Dec 8, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
2025020267 Issued in MO
Practice address
1 Barnes Jewish Hospital PLZ
Dept Anesthesiology
Saint Louis, MO 63110-1003
Phone
(800) 862-9980
Fax
(314) 362-1185
NPI assigned
Mar 22, 2012
Last updated
Dec 8, 2025By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 8, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X 2025020267 MO Primary

Addresses

Primary practice location

1 Barnes Jewish Hospital PLZ
Dept Anesthesiology
Saint Louis, MO 63110-1003

Mailing address

PO Box 7412011
Chicago, IL 60674-2011
Phone (800) 862-9980

Other identifiers 1

IdentifierTypeStateIssuer
220123646MedicaidMO

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 IL, MO2 enrollments
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 2

Enrollment IDStateProvider typePAC IDDetails
I20120424000243 IL Practitioner - Physician Assistant 3274795091 Reassigns benefits to 3 organizations
I20250625003980 MO Practitioner - Physician Assistant 3274795091 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2011
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Washington UniversityGroup PAC ID 9830008770, 2,968 clinicians

Practice addresses (Care Compare)

1 Barnes Jew Hosp PLZ
Saint Louis, MO 63110-1003
Phone (314) 747-3000

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Uptown Emergency Physicians LLP Physician Assistant CurrentSince Apr 1, 2012 Accepting new patients
Washington University Physicians in Illinois, Inc CurrentSince Jul 28, 2025 Accepting new patients
Washington University CurrentSince Jul 14, 2025 Accepting new patients
Illinois Hospitalists, LLP CurrentSince Jun 1, 2015 Accepting new patients
Washington University Physicians in Illinois, Inc. CurrentSince Jul 28, 2025 Accepting new patients
Washington University CurrentSince Jul 14, 2025 Accepting new patients

Locations

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

1103 Belt Line Rd
Collinsville, IL 62234
Phone (618) 344-2273

200 Health Care Dr
Greenville, IL 62246
Phone (618) 664-0808

6800 State Route 162
Maryville, IL 62062
Phone (618) 288-4095

1 Barnes Hsp Plz
Saint Louis, MO 63110
Phone (314) 273-4966

1 Barnes Jewish Hospital Plz
Saint Louis, MO 63110
Phone (314) 362-1700

660 S Euclid Ave
Saint Louis, MO 63110

Organizations & group practices 9

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.

Hospital & facility affiliations 1

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": "1332374400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765152000000",
    "number": "1861768905",
    "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": "800-862-9980",
            "fax_number": "314-362-1185"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 BARNES JEWISH HOSPITAL PLZ",
            "address_2": "DEPT ANESTHESIOLOGY",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631101003",
            "telephone_number": "800-862-9980",
            "fax_number": "314-362-1185"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GERLING",
        "first_name": "HILLARY",
        "middle_name": "ANN",
        "name_prefix": "Ms.",
        "credential": "PA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2012-03-22",
        "last_updated": "2025-12-08",
        "certification_date": "2025-09-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MO",
            "license": "2025020267",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "220123646",
            "state": "MO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "affiliationName": "Washington University",
            "address_1": "1 Barnes Jewish Hospital Plz",
            "address_2": "Dept Anesthesiology",
            "city": "Saint Louis",
            "state": "MO",
            "country_code": "US",
            "postal_code": "631101003",
            "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.