NPIMap

Individual provider Active NPI

Thomas Joseph Ahearn, PA-C

  • Physician Assistant
  • Warrenville, IL
National Provider Identifier
1962872200
Registry record updated Dec 18, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
085006089 Issued in IL
Practice address
27650 Ferry Rd Ste 110
Warrenville, IL 60555-3846
Phone
(630) 315-6543
Fax
(630) 315-6537
NPI assigned
Sep 29, 2015
Last updated
Dec 18, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 18, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X 085006089 IL Primary
Physician Assistant 363A00000X 1128403 CA

Addresses

Primary practice location

27650 Ferry Rd Ste 110
Warrenville, IL 60555-3846

Mailing address

27650 Ferry Rd Ste 110
Warrenville, IL 60555-3846
Phone (630) 315-6543

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA, IL2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20151112002663 CA Practitioner - Physician Assistant 9830409317 Reassigns benefits to 4 organizations
I20251103001317 IL Practitioner - Physician Assistant 9830409317 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2015
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Central Dupage Physician GroupGroup PAC ID 5890696231, 1,087 clinicians

Practice addresses (Care Compare)

27650 Ferry Rd
Warrenville, IL 60555-3845
Phone (630) 225-2663

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
100 of 100Reported as group
Quality
96.39
Improvement activities
40

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
52843CAMDGeneral Practice Dentistry
1128403CAMDPhysician Assistant
085006089ILMDPhysician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Central Dupage Physician Group CurrentSince Nov 17, 2025 Accepting new patients
Cep America-California CurrentSince Jan 1, 2017 Accepting new patients
Cep America-California CurrentSince Nov 1, 2015 Accepting new patients
Cep America-California CurrentSince Nov 1, 2015 Accepting new patients
Central Dupage Physician Group CurrentSince Nov 17, 2025 Accepting new patients

Locations

751 Medical Center Ct
#1182
Chula Vista, CA 91911

2755 Herndon Ave
Clovis, CA 93611
Phone (559) 323-4000

400 N Pepper Ave
Colton, CA 92324
Phone (909) 580-1400

9920 Talbert Ave
Fountain Vly, CA 92708
Phone (714) 236-4000

1601 Cummins Dr
Ste D
Modesto, CA 95358
Phone (510) 900-3125

1325 N Highland Ave
Aurora, IL 60506
Phone (630) 801-2756

Dept 5777
Carol Stream, IL 60122

27650 Ferry Rd
Warrenville, IL 60555
Phone (630) 225-2345

27650 Ferry Rd
Ste 100
Warrenville, IL 60555
Phone (630) 225-2455

27650 Ferry Rd
Ste 110
Warrenville, IL 60555
Phone (630) 315-6543

1800 N Main St
Wheaton, IL 60187
Phone (630) 469-0045

Interoperability endpoints

  • Direct secure messaging: tahearn419313@direct.memorialcare.org

Organizations & group practices 11

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 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": "1443484800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766016000000",
    "number": "1962872200",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "27650 FERRY RD STE 110",
            "city": "WARRENVILLE",
            "state": "IL",
            "postal_code": "605553846",
            "telephone_number": "630-315-6543",
            "fax_number": "630-315-6537"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "27650 FERRY RD STE 110",
            "city": "WARRENVILLE",
            "state": "IL",
            "postal_code": "605553846",
            "telephone_number": "630-315-6543",
            "fax_number": "630-315-6537"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "AHEARN",
        "first_name": "THOMAS",
        "middle_name": "JOSEPH",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-09-29",
        "last_updated": "2025-12-18",
        "certification_date": "2025-12-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "IL",
            "license": "085006089",
            "primary": true
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "1128403",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Warrenville, IL

Sources for this page

Verify at the official NPI Registry.