Stephen Byungchul Kwak, DO
Diagnostic Radiology Physician · Lake Forest, IL
Stephen Byungchul Kwak, DO is a diagnostic radiology physician with a practice address in Lake Forest, Illinois, and NPI 1831517580, issued on Mar 31, 2014. Check the license (Illinois 036152630, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Stephen Byungchul Kwak
- Credential
- DO
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- 036152630 IL
125066173 IL
OT016043 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 N Westmoreland RD, Lake Forest, IL 60045
- Phone
- (847) 234-5600
- Enumerated
- Mar 31, 2014
- Record last updated
- Sep 24, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (847) 535-7847
- Medicare enrollment
- Enrolled (PECOS I20200721003103); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,874 in Illinois → Look up another NPI →
Also registered at 1000 N Westmoreland RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mariyam Alam, PA-CPhysician Assistant1740087394
- Wendy Allen, CNMAdvanced Practice Midwife1629161369
- Mohammed Alzoubaidi, MBBS,MPHPulmonary Disease Physician1184880031
- Christina Anderson, M.D.Interventional Cardiology Physician1568846434
Verify Stephen Byungchul Kwak 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 036152630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Henry County Health Center IncNorthbrook, IL
- Southeast Iowa Regional Medical Center IncNorthbrook, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Byungchul Kwak among 1,874 diagnostic radiology physician records in Illinois
Stephen Byungchul Kwak, DO is one of 1,874 diagnostic radiology physician records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 74% of them.
- NPI issued2014 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2014 · median 2004 among the 1,201 with a school on file
- Record last updated2020 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 diagnostic radiology physician records list a practice address in Lake Forest
They are 10 of the 821 NPPES records with a practice address in Lake Forest, and 1,874 diagnostic radiology physician records in Illinois.
All 1,874 in Illinois → Every provider in Lake Forest → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Deepak Dalia, MDLake Forest, IL 600451508867441
- Pamela Donlan, MDLake Forest, IL 600451962472324
- Beck Hur, MDLake Forest, IL 600451326022161
- Deepa Popuri, MDLake Forest, IL 600451467656041
- Ramanujam Prativadi, MDLake Forest, IL 600451063778462
- Saudur Rahman, M.D.Lake Forest, IL 600451184987356
- Monika Rastogi, MDLake Forest, IL 600451558757815
- Ryan Scott, M.D.Lake Forest, IL 600451396139580
Common questions
What is Stephen Byungchul Kwak, DO's NPI number?
Stephen Byungchul Kwak, DO's National Provider Identifier (NPI) is 1831517580, issued on Mar 31, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Byungchul Kwak, DO located?
The NPPES record lists a practice address at 1000 N Westmoreland RD, Lake Forest, IL, 60045. Phone: (847) 234-5600. Providers update this record themselves, so call before visiting.
How can I verify Stephen Byungchul Kwak, DO's license?
NPPES lists Illinois license number 036152630, 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.
What is Stephen Byungchul Kwak, DO's MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.