John R. Principe, MD
Internal Medicine Physician · Palos Heights, IL
John R. Principe, MD is an internal medicine physician with a practice address in Palos Heights, Illinois, and NPI 1639285810, issued on Aug 21, 2006. Check the license (Illinois 036071432, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John R. Principe
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036071432 IL
Self-reported in NPPES; status is on the state search - Practice location
- 11950 S Harlem Ave, Palos Heights, IL 60463
- Phone
- (708) 448-9450
- Enumerated
- Aug 21, 2006
- Record last updated
- Dec 12, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (708) 448-9459
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 11950 S Harlem Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dominika Zahradnicek, D.C.Chiropractor1396015764
Verify John R. Principe 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 036071432Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
242 Medicare Part D claims for 53 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Levothyroxine Sodium16 claims
- Armour Thyroid15 claims
- Glucagon Emergency Kit15 claims
- Amlodipine Besylate11 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.
John R. Principe among 7,238 internal medicine physician records in Illinois
John R. Principe, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2011 · 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 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 internal medicine physician records list a practice address in Palos Heights
They are 34 of the 992 NPPES records with a practice address in Palos Heights, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Palos Heights → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Samina Chaudhry, M.D.Palos Heights, IL 604631467487884
- Matthew Fitz, MDPalos Heights, IL 604631205800513
- Florie Gonsch, D.O.Palos Heights, IL 604631831144476
- Noorun Khan, M.D.Palos Heights, IL 604631548234073
- Samina Khan, M.D.Palos Heights, IL 604631376512475
- Irma Kuptel, MDPalos Heights, IL 604631508808999
- Maria Lentzou, M.D.Palos Heights, IL 604631124071139
- James Miller, MDPalos Heights, IL 604631710933544
Common questions
What is John R. Principe, MD's NPI number?
John R. Principe, MD's National Provider Identifier (NPI) is 1639285810, issued on Aug 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John R. Principe, MD located?
The NPPES record lists a practice address at 11950 S Harlem Ave, Palos Heights, IL, 60463. Phone: (708) 448-9450. Providers update this record themselves, so call before visiting.
How can I verify John R. Principe, MD's license?
NPPES lists Illinois license number 036071432, 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 R. Principe, MD prescribe under Medicare Part D?
In 2024, John R. Principe, MD had 242 Medicare Part D claims for 53 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.