Orna A. Regen, MD
Internal Medicine Physician · Chicago, IL
Orna A. Regen, MD is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1134327604, issued on Jul 6, 2007. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Orna A. Regen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 224627 NY
Self-reported in NPPES; status is on the state search - Practice location
- 4848 W Irving Park RD, Chicago, IL 60641
- Phone
- (855) 625-7878
- Enumerated
- Jul 6, 2007
- Record last updated
- Mar 7, 2023
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 4848 W Irving Park RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Antoni, APNFamily Nurse Practitioner1700276995
- Gabriela Ferrera, M.D.Internal Medicine Physician1992002711
- Karen Jellen, N.P.Family Nurse Practitioner1790868347
- Shira Lerner, MDFamily Medicine Physician1609226869
- Rebecca Levine, M.D.Family Medicine Physician1841553294
- Daphne Martin, LCSWClinical Social Worker1801637020
Verify Orna A. Regen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
78 Medicare Part D claims for 19 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Atorvastatin Calcium16 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.
Orna A. Regen among 7,238 internal medicine physician records in Illinois
Orna A. Regen, 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 2007, is newer than 39% of them.
- NPI issued2007 · 39% of these records are older, 55% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2023 · 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).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Edith Abramson, M.D.Chicago, IL 606411922422427
- Ramon Castro, MDChicago, IL 606411710916663
- Gabriela Ferrera, M.D.Chicago, IL 606411992002711
- Sue Lee, M.D.Chicago, IL 606411508870270
- Rusalina Muntean-Mincu, MDChicago, IL 606411295782431
- Megha Patel, PA-CChicago, IL 606411962984773
- Chandra Rathod, MDChicago, IL 606411710073689
- Thomas Ruppert, M.D.Chicago, IL 606411538332564
Common questions
What is Orna A. Regen, MD's NPI number?
Orna A. Regen, MD's National Provider Identifier (NPI) is 1134327604, issued on Jul 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Orna A. Regen, MD located?
The NPPES record lists a practice address at 4848 W Irving Park RD, Chicago, IL, 60641. Phone: (855) 625-7878. Providers update this record themselves, so call before visiting.
How can I verify Orna A. Regen, MD's license?
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 Orna A. Regen, MD prescribe under Medicare Part D?
In 2024, Orna A. Regen, MD had 78 Medicare Part D claims for 19 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.