Justin Duffy, PA-C
Physician Assistant · McHenry, IL
Justin Duffy, PA-C is a physician assistant with a practice address in McHenry, Illinois, and NPI 1174918809, issued on Mar 31, 2015. Check the license (Illinois 1174918809, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Justin Duffy
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 1174918809 IL
MA059753 PA
0110008240 VA
Self-reported in NPPES; status is on the state search - Practice location
- 4309 W Medical Center Dr Ste A200, McHenry, IL 60050
- Phone
- (815) 759-8070
- Enumerated
- Mar 31, 2015
- Record last updated
- Jan 20, 2025
- Fax
- (815) 759-4931
- Medicare enrollment
- Enrolled (PECOS I20230921001283); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 4309 W Medical Center Dr Ste A200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Judi FornerAdult Health Clinical Nurse Specialist1194123679
- Jana Goodall, APRN, CNPNurse Practitioner1255733010
- Sarah Greenaway, APRN, CNPNurse Practitioner1962865626
Verify Justin Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 1174918809Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average physician assistant in 2024
345 Medicare Part D claims for 81 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 34 claims were for opioids.
Most prescribed
- Metoprolol Tartrate69 claims
- Atorvastatin Calcium33 claims
- Pantoprazole Sodium28 claims
- Clopidogrel27 claims
- Amiodarone Hcl25 claims
- Potassium Chloride24 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.
Bills Medicare through 2 group practices
- Baycare Medical Group, Inc.Clearwater, FL
- Florida Hospital Healthcare Partners, IncOrange City, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
27 physician assistant records list a practice address in McHenry
They are 27 of the 1,852 NPPES records with a practice address in McHenry, and 4,926 physician assistant records in Illinois.
All 27 in McHenry → All 4,926 in Illinois → Every provider in McHenry →
Other physician assistant records in Illinois
- Brooke Aarhus, PA-CPark Ridge, IL1760985469
- Sana Abbasi, PACarol Stream, IL1831803295
- Susan Abbinanti, PA-CElk Grove Village, IL1679647358
- Katheryn Abbott, PASchaumburg, IL1356842082
- Noor Abdelrahman, PA-CChicago, IL1851012413
- Amer Abdulghafoor, MSW, MS, PA-CChicago, IL1619401718
- Kazuko Abe, P.A.Chicago, IL1881840783
- Greta Abel, PA-CWheaton, IL1174844096
- Derrik AbellAnna, IL1821618471
- Jeanine Aberbook, PA-CChicago, IL1518664176
Common questions
What is Justin Duffy, PA-C's NPI number?
Justin Duffy, PA-C's National Provider Identifier (NPI) is 1174918809, issued on Mar 31, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Justin Duffy, PA-C located?
The NPPES record lists a practice address at 4309 W Medical Center Dr Ste A200, McHenry, IL, 60050. Phone: (815) 759-8070. Providers update this record themselves, so call before visiting.
How can I verify Justin Duffy, PA-C's license?
NPPES lists Illinois license number 1174918809, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Justin Duffy, PA-C prescribe under Medicare Part D?
In 2024, Justin Duffy, PA-C had 345 Medicare Part D claims for 81 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.