John Junhaeng Lee, M.D.
Internal Medicine Physician · Springfield, IL
John Junhaeng Lee, M.D. is an internal medicine physician with a practice address in Springfield, Illinois, and NPI 1336374297, issued on May 21, 2009. Check the license (Illinois 036.1481119, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Junhaeng Lee
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036.1481119 IL
01073611 IN
0101252536 VA
Self-reported in NPPES; status is on the state search - Practice location
- 751 N Rutledge St Ste 1100, Springfield, IL 62702
- Phone
- (217) 545-8000
- Enumerated
- May 21, 2009
- Record last updated
- Jan 26, 2024
- Medicaid ID
- 201223200 IN
- Medicare enrollment
- Enrolled (PECOS I20190318001580); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 751 N Rutledge St Ste 1100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Robert Glickenberger, MDGastroenterology Physician1407966690
- Mark Graves, MDInternal Medicine Physician1285702308
Verify John Junhaeng Lee 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 036.1481119Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average internal medicine physician in 2024
920 Medicare Part D claims for 278 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 95 claims were for opioids.
Most prescribed
- Atorvastatin Calcium45 claims
- Omeprazole38 claims
- Hydrocodone-Acetaminophen33 claims
- Metoprolol Succinate33 claims
- Gabapentin30 claims
- Amlodipine Besylate26 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 one group practice
- Board OF Trustees OF Southern Illinois UniversitySpringfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Junhaeng Lee among 7,238 internal medicine physician records in Illinois
John Junhaeng Lee, M.D. 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 2009, is newer than 49% of them.
- NPI issued2009 · 49% of these records are older, 49% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2009 · median 2003 among the 3,580 with a school on file
- Record last updated2024 · 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).
196 internal medicine physician records list a practice address in Springfield
They are 196 of the 4,997 NPPES records with a practice address in Springfield, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lisa Benning, M.D.Springfield, IL 627021689672289
- Erik Constance, M.D.Springfield, IL 627021427033497
- Alan Deckard, M.D.Springfield, IL 627021104801190
- Nicole Florence, M.D.Springfield, IL 627021811983851
- Susan Hingle, MDSpringfield, IL 627021124003124
- Larry Holder, M.D.Springfield, IL 627021417914326
- Praveen Kandula, M.D.Springfield, IL 627021912982919
- Regina Kovach, M.D.Springfield, IL 627021164407169
Common questions
What is John Junhaeng Lee, M.D.'s NPI number?
John Junhaeng Lee, M.D.'s National Provider Identifier (NPI) is 1336374297, issued on May 21, 2009. An NPI identifies a provider in billing; it is not a license.
Where is John Junhaeng Lee, M.D. located?
The NPPES record lists a practice address at 751 N Rutledge St Ste 1100, Springfield, IL, 62702. Phone: (217) 545-8000. Providers update this record themselves, so call before visiting.
How can I verify John Junhaeng Lee, M.D.'s license?
NPPES lists Illinois license number 036.1481119, 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 Junhaeng Lee, M.D. prescribe under Medicare Part D?
In 2024, John Junhaeng Lee, M.D. had 920 Medicare Part D claims for 278 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.