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THOMAS JOSEPH AHEARN PA-C
NPI 1962872200
Physician Assistant in Warrenville, IL

Active since September 29, 2015PECOS EnrolledAccepts Medicare Assignment
27650 FERRY RD STE 110, WARRENVILLE, IL 60555(630) 315-6543(630) 315-6537 Get Directions Write a Review

NPPES record last updated: December 18, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 18, 2025, Sep 29, 2015 (2 updates tracked since 2015).

About Thomas Joseph Ahearn Pa-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THOMAS JOSEPH AHEARN PA-C (NPI 1962872200) is an individual physician assistant in Warrenville, Illinois, licensed in Illinois (085006089) and active in the NPI registry since September 2015. He is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Central Dupage Hospital, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1962872200
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameTHOMAS JOSEPH AHEARNCredential: PA-C
Location Address27650 FERRY RD STE 110Warrenville, IL 60555-3846
Mailing Address27650 Ferry Rd Ste 110Warrenville, IL 60555-3846 · (630) 315-6543 · Fax (630) 315-6537
Phone(630) 315-6543
Fax(630) 315-6537
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateSeptember 29, 2015
Last NPPES UpdateDecember 18, 20252 updates tracked since enumeration
NPPES CertifiedDecember 18, 2025
✔ NPI 1962872200 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Licenses✔ Licensed in IL · 085006089✔ Licensed in CA · 1128403
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
27650 FERRY RD STE 110, Warrenville, IL 60555
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Thomas Joseph Ahearn Pa-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9830409317
PECOS Enrollment IDI20251103001317
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
94 services92 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
73 services71 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
15 services15 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
13 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140242
Location25 North Winfield RoadWinfield, IL 60190 · Du Page County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60555 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
Established Patient
$74.38 typical visit price
range $19.15 – $147.12
Typical copayment $18.59 (range $4.78 – $36.78)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

NORTHWESTERN MEDICAL FACULTY FOUNDATION
Durable Medical Equipment & Medical Supplies
27650 FERRY RD STE 110
WARRENVILLE, IL 60555
Dupage County (630) 225-2663
HANIT U SHAH
Family Medicine
27650 FERRY RD STE 110
WARRENVILLE, IL 60555
Dupage County (630) 315-6543
KRISTINE V TORIO P.A.
Physician Assistant
27650 FERRY RD STE 110
WARRENVILLE, IL 60555
Dupage County (630) 315-6543

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Thomas Ahearn's NPI number?

The NPI number for Thomas Ahearn is 1962872200. It was assigned to this individual provider in the NPPES registry on September 29, 2015.

Where is Thomas Ahearn located?

Thomas Ahearn practices at 27650 Ferry Rd Ste 110, Warrenville, IL 60555. The listed phone number is (630) 315-6543.

What is Thomas Ahearn's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Thomas Ahearn enrolled in Medicare?

Yes. Thomas Ahearn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Thomas Ahearn affiliated with any hospitals?

According to CMS data, Thomas Ahearn is affiliated with Northwestern Medicine Central Dupage Hospital.

When was this NPI record last updated?

The NPPES record for Thomas Ahearn was last updated on December 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.