John Pacini, DO
Emergency Medicine Physician · McHenry, IL
John Pacini, DO is an emergency medicine physician with a practice address in McHenry, Illinois, and NPI 1134232309, issued on Aug 15, 2006. Check the license (Illinois 036098116, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Pacini
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036098116 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4201 W Medical Center Dr, McHenry, IL 60050
- Phone
- (815) 759-3100
- Enumerated
- Aug 15, 2006
- Record last updated
- Aug 8, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (815) 363-9044
- Medicare enrollment
- Enrolled (PECOS I20091201000082); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1996
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 4201 W Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Wasfia Alikhan, M.D.Diagnostic Radiology Physician1902291834
- Yasser Almadani, MDStudent in an Organized Health Care Education/Training Program1881497634
- Altaf Aman, M.D.Hospitalist Physician1942381132
Verify John Pacini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036098116Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.6 times the Medicare Part D claims of the average emergency medicine physician in 2024
817 Medicare Part D claims for 428 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 139 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen101 claims
- Cefadroxil96 claims
- Prednisone89 claims
- Ondansetron Odt79 claims
- Methylprednisolone61 claims
- Amoxicillin-Clavulanate Potass56 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationHuntley, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Pacini among 3,291 emergency medicine physician records in Illinois
John Pacini, DO is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 68% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1996 · median 2012 among the 1,867 with a school on file
- Record last updated2017 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 emergency medicine physician records list a practice address in McHenry
They are 30 of the 1,852 NPPES records with a practice address in McHenry, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in McHenry → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Peggy Banks, D.O.McHenry, IL 600501518922962
- Theodore Banks, MDMcHenry, IL 600501790723500
- Pardeep Bhanot, MDMcHenry, IL 600501477521797
- Timothy Bollinger, DOMcHenry, IL 600501629013313
- Daniel Campagna, MDMcHenry, IL 600501437262557
- Linda Furlan, MDMcHenry, IL 600501780639716
- Oscar HabhabMcHenry, IL 600501609989813
- Brian Jokhy, M.D.McHenry, IL 600501508802554
Common questions
What is John Pacini, DO's NPI number?
John Pacini, DO's National Provider Identifier (NPI) is 1134232309, issued on Aug 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Pacini, DO located?
The NPPES record lists a practice address at 4201 W Medical Center Dr, McHenry, IL, 60050. Phone: (815) 759-3100. Providers update this record themselves, so call before visiting.
How can I verify John Pacini, DO's license?
NPPES lists Illinois license number 036098116, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Pacini, DO prescribe under Medicare Part D?
In 2024, John Pacini, DO had 817 Medicare Part D claims for 428 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is John Pacini, DO's MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.