Thomas Joseph Ahearn, PA-C
Physician Assistant · Warrenville, IL
Thomas Joseph Ahearn, PA-C is a physician assistant with a practice address in Warrenville, Illinois, and NPI 1962872200, issued on Sep 29, 2015. Check the license (Illinois 085006089, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thomas Joseph Ahearn
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 085006089 IL
1128403 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27650 Ferry RD Ste 110, Warrenville, IL 60555
- Phone
- (630) 315-6543
- Enumerated
- Sep 29, 2015
- Record last updated
- Dec 18, 2025
- Fax
- (630) 315-6537
- Medicare enrollment
- Enrolled (PECOS I20251103001317); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,926 in Illinois → Look up another NPI →
Also registered at 27650 Ferry RD Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hanit ShahFamily Medicine Physician1366963332
- Kristine Torio, P.A.Physician Assistant1790756492
Verify Thomas Joseph Ahearn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 085006089Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average physician assistant in 2024
176 Medicare Part D claims for 141 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 56 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen42 claims
- Cephalexin13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $86.16
3 payments; by number, the most common kind was food and beverage; the largest payer was Inari Medical, Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Central Dupage Physician GroupWarrenville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Joseph Ahearn among 4,926 physician assistant records in Illinois
Thomas Joseph Ahearn, PA-C is one of 4,926 physician assistant records with a practice address in Illinois. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 36% of them.
- NPI issued2015 · 36% of these records are older, 60% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2015 · median 2019 among the 3,407 with a school on file
- Record last updated2025 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
35 physician assistant records list a practice address in Warrenville
They are 35 of the 517 NPPES records with a practice address in Warrenville, and 4,926 physician assistant records in Illinois.
All 4,926 in Illinois → Every provider in Warrenville → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Shannon Backes, PAWarrenville, IL 605551386896793
- Shannon Crabtree, PA-CWarrenville, IL 605551750713541
- Kaylee Craigo, PA-CWarrenville, IL 605551992192546
- Courtney Donoghue, PA-CWarrenville, IL 605551174718498
- Christopher Ferron, P.A.Warrenville, IL 605551144256231
- Christopher Kwong, PAWarrenville, IL 605551316901705
- Rebecca Maczko, PAWarrenville, IL 605551942457734
- Shannon McCormick, PAWarrenville, IL 605551528021219
Common questions
What is Thomas Joseph Ahearn, PA-C's NPI number?
Thomas Joseph Ahearn, PA-C's National Provider Identifier (NPI) is 1962872200, issued on Sep 29, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Joseph Ahearn, PA-C located?
The NPPES record lists a practice address at 27650 Ferry RD Ste 110, Warrenville, IL, 60555. Phone: (630) 315-6543. Providers update this record themselves, so call before visiting.
How can I verify Thomas Joseph Ahearn, PA-C's license?
NPPES lists Illinois license number 085006089, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Thomas Joseph Ahearn, PA-C prescribe under Medicare Part D?
In 2024, Thomas Joseph Ahearn, PA-C had 176 Medicare Part D claims for 141 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.