Karen N. Whitehorn, MD
Internal Medicine Physician · Flossmoor, IL
Karen N. Whitehorn, MD is an internal medicine physician with a practice address in Flossmoor, Illinois, and NPI 1972535102, issued on Jul 7, 2006. Check the license (Illinois 036115711, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Karen N. Whitehorn
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036115711 IL
Self-reported in NPPES; status is on the state search - Practice location
- 19550 S Governors Hwy, Flossmoor, IL 60422
- Phone
- (708) 957-8750
- Enumerated
- Jul 7, 2006
- Record last updated
- Dec 19, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (708) 957-8602
- Medicaid ID
- 036115711 IL
- Medicare enrollment
- Enrolled (PECOS I20060801000286); may accept Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify Karen N. Whitehorn 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 036115711Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,114 Medicare Part D claims for 228 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 122 claims were for opioids.
Most prescribed
- Amlodipine Besylate92 claims
- Rosuvastatin Calcium88 claims
- Atorvastatin Calcium74 claims
- Omeprazole69 claims
- Albuterol Sulfate Hfa63 claims
- Levothyroxine Sodium57 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.
Karen N. Whitehorn among 7,238 internal medicine physician records in Illinois
Karen N. Whitehorn, 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 fileYes · 50% of these records are
- Graduated2003 · median 2003 among the 3,580 with a school on file
- Record last updated2018 · 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).
8 internal medicine physician records list a practice address in Flossmoor
They are 8 of the 384 NPPES records with a practice address in Flossmoor, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Flossmoor → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Cynthia Alston, M.D.Flossmoor, IL 604221487923496
- Ryan Garwood, DOFlossmoor, IL 604221811639354
- Sameh Nabelsi, M.D.Flossmoor, IL 604221518923515
- Arsenia Nepomuceno, MDFlossmoor, IL 604221154302685
- Edilberto Nepomuceno, MDFlossmoor, IL 604221801877337
- Milagros Puray, M.D.Flossmoor, IL 604221477607414
- Romuald Warakomski, D.O.Flossmoor, IL 604221427153618
- Nadeem Ahmad, MDFrankfort, IL 604231700868023
Common questions
What is Karen N. Whitehorn, MD's NPI number?
Karen N. Whitehorn, MD's National Provider Identifier (NPI) is 1972535102, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen N. Whitehorn, MD located?
The NPPES record lists a practice address at 19550 S Governors Hwy, Flossmoor, IL, 60422. Phone: (708) 957-8750. Providers update this record themselves, so call before visiting.
How can I verify Karen N. Whitehorn, MD's license?
NPPES lists Illinois license number 036115711, 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 Karen N. Whitehorn, MD prescribe under Medicare Part D?
In 2024, Karen N. Whitehorn, MD had 2,114 Medicare Part D claims for 228 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.