Caitlin Alonzo

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

209034125 Issued in IL

Practice address

1 Saint Elizabeth Blvd
O Fallon, IL 62269-1099

Phone

(618) 234-2120

NPI assigned

Nov 26, 2025

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

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

Specialty

Nurse Practitioner

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cep America-Illinois Hospitalists, LLPGroup PAC ID 3274765904, 193 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• HSHS St Elizabeth'S Hospital Hospital, O Fallon, IL, CCN 140187
• St Joseph'S Hospital Hospital, Highland, IL, CCN 141336

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

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.

• Cep America-Illinois Hospitalists, LLP

  • Internal Medicine Physician
  • Belleville, IL
  • NPI 1841613403

  IL

  Medicare reassignment Care Compare group
• Cep America-Illinois Hospitalists

  • Hospitalist Physician
  • Bloomington, IL
  • NPI 1669276523
  NPD

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

• St Elizabeths Hospital of the Hospital Sisters of the Third Order

  • General Acute Care Hospital
  • O Fallon, IL
  • NPI 1629057302

  Hospital

  Care Compare affiliation
• St Josephs Hospital of the Hospital Sisters of the Third Order of St F

  • Critical Access Hospital
  • Highland, IL
  • NPI 1447352323

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1764115200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774224000000",
    "number": "1083576243",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "212 HARBOR VW",
            "city": "FENTON",
            "state": "MO",
            "postal_code": "630267515"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 SAINT ELIZABETH BLVD",
            "city": "O FALLON",
            "state": "IL",
            "postal_code": "622691099",
            "telephone_number": "618-234-2120"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ALONZO",
        "first_name": "CAITLIN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-11-26",
        "last_updated": "2026-03-23",
        "certification_date": "2026-03-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "IL",
            "license": "209034125",
            "primary": true
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MO",
            "license": "2025008810",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Ashley Dawn Amburn, LCPC
• Amedisys Illinois LLC

• All providers in O Fallon, IL
• Nurse Practitioner in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 23, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.