Diedra M Ahlert, CPNP-PC

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

209021680 Issued in IL

Practice address

4 Memorial Dr Ste 110
Alton, IL 62002-6704

Phone

(618) 433-6570

Fax

(618) 433-6571

NPI assigned

Jul 28, 2020

Last updated

Nov 2, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: diedra.ahlert.1@2511.direct.athenahealth.com
• FHIR API: https://api.platform.athenahealth.com/2511/brand/1/csg/1/fhir/r4

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.

• Pediatric Healthcare Unlimited

  • Pediatrics Physician
  • Alton, IL
  • NPI 1982766390
  NPD (past)
• Washington University Physicians in Illinois, Inc

  • Multi-Specialty Clinic/Center
  • O'Fallon, IL
  • NPI 1477076263
  NPD (past)

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

{
    "created_epoch": "1595894400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1793577600000",
    "number": "1508475294",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 959203",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631959203",
            "telephone_number": "618-433-6570",
            "fax_number": "618-433-6571"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4 MEMORIAL DR STE 110",
            "city": "ALTON",
            "state": "IL",
            "postal_code": "620026704",
            "telephone_number": "618-433-6570",
            "fax_number": "618-433-6571"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1320 Lexington Dr",
            "address_purpose": "LOCATION",
            "city": "Collinsville",
            "state": "IL",
            "postal_code": "622344348",
            "country_code": "US",
            "telephone_number": "618-444-3351",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "AHLERT",
        "first_name": "DIEDRA",
        "middle_name": "M",
        "name_prefix": "Ms.",
        "credential": "CPNP-PC",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2020-07-28",
        "last_updated": "2026-11-02",
        "certification_date": "2026-11-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "IL",
            "license": "209021680",
            "primary": true
        },
        {
            "code": "363LP0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Pediatrics",
            "state": "MO",
            "license": "2020022571",
            "primary": false
        },
        {
            "code": "363LP0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Pediatrics",
            "state": "IL",
            "license": "209.021680",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2",
            "affiliation": "N",
            "endpointDescription": "BJC",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "4 Memorial Dr Ste 110",
            "city": "Alton",
            "state": "IL",
            "country_code": "US",
            "postal_code": "620026704",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

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• Nurse Practitioner in Alton, IL
• Providers in Alton, IL by specialty
• Nurse Practitioner in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 2, 2026; 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.