Peter S. Yoon, M.D.
Internal Medicine Physician · Deerfield, IL
Peter S. Yoon, M.D. is an internal medicine physician with a practice address in Deerfield, Illinois, and NPI 1417905944, issued on May 5, 2006. Check the license (Illinois 036111844, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Peter S. Yoon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036111844 IL
036-111844 IL
Self-reported in NPPES; status is on the state search - Practice location
- 350 S Waukegan RD Ste 100&200, Deerfield, IL 60015
- Phone
- (847) 535-7157
- Enumerated
- May 5, 2006
- Record last updated
- Dec 1, 2023
- Fax
- (224) 271-4332
- Medicaid ID
- 036-111844 IL
- Medicare enrollment
- Enrolled (PECOS I20050502000905); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 350 S Waukegan RD Ste 100&200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachel Lauber, APRN, CNPNurse Practitioner1811524713
- Lisa Peck, M.D.Internal Medicine Physician1679539563
- Melissa Zimmerman, MD, MPHPediatrics Physician1831551332
Verify Peter S. Yoon 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 036111844Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,829 Medicare Part D claims for 351 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. 38 claims were for opioids.
Most prescribed
- Atorvastatin Calcium148 claims
- Levothyroxine Sodium102 claims
- Losartan Potassium86 claims
- Omeprazole85 claims
- Rosuvastatin Calcium67 claims
- Amlodipine Besylate66 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
- Northwestern Medical Faculty FoundationDeerfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter S. Yoon among 7,238 internal medicine physician records in Illinois
Peter S. Yoon, 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 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
- Graduated2002 · median 2003 among the 3,580 with a school on file
- 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).
21 internal medicine physician records list a practice address in Deerfield
They are 21 of the 712 NPPES records with a practice address in Deerfield, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Deerfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lewis Barr, M.D.Riverwoods, IL 600151245267962
- Dana Ben-Dov, MDDeerfield, IL 600151194709477
- Mitul DesaiDeerfield, IL 600151437118361
- Jeffrey Foreman, M.D.Deerfield, IL 600151881663243
- Larry Kaskel, MDBannockburn, IL 600151285620484
- Tom Klein, MDRiverwoods, IL 600151326094194
- Monika McLain, MDBannockburn, IL 600151376539718
- Lisa Peck, M.D.Deerfield, IL 600151679539563
Common questions
What is Peter S. Yoon, M.D.'s NPI number?
Peter S. Yoon, M.D.'s National Provider Identifier (NPI) is 1417905944, issued on May 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter S. Yoon, M.D. located?
The NPPES record lists a practice address at 350 S Waukegan RD Ste 100&200, Deerfield, IL, 60015. Phone: (847) 535-7157. Providers update this record themselves, so call before visiting.
How can I verify Peter S. Yoon, M.D.'s license?
NPPES lists Illinois license number 036111844, 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 Peter S. Yoon, M.D. prescribe under Medicare Part D?
In 2024, Peter S. Yoon, M.D. had 1,829 Medicare Part D claims for 351 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.