Il Y. Yoo, M.D.
Emergency Medicine Physician · Chicago, IL
Il Y. Yoo, M.D. is an emergency medicine physician with a practice address in Chicago, Illinois, and NPI 1104826254, issued on Jul 29, 2005. Check the license (Illinois 036-052573, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Il Y. Yoo
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036-052573 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1501 S California Ave, Chicago, IL 60608
- Phone
- (773) 257-6843
- Enumerated
- Jul 29, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 036-052573-5 IL
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 1501 S California Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Yoglackshan Ahluwalia, M.D.Psychiatry Physician1033101688
- Ayesha Ahmed, M.D.Anesthesiology Physician1104825108
- Mohammad Ahmed, M.D.Nephrology Physician1831190784
Verify Il Y. Yoo 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 036-052573Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average emergency medicine physician in 2024
23 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Il Y. Yoo among 3,291 emergency medicine physician records in Illinois
Il Y. Yoo, M.D. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2007 · 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 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,310 emergency medicine physician records list a practice address in Chicago
They are 1,310 of the 63,379 NPPES records with a practice address in Chicago, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Chicago → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Harlan Bogie, M.D.Chicago, IL 606081174523658
- Stephen Boren, M.D.Chicago, IL 606081184624546
- Tobin Efferen, M.D.Chicago, IL 606081780778472
- Stephanie Eugene, M.D.Chicago, IL 606081265691646
- Jorge Ferrer, M.D.Chicago, IL 606081225038680
- Earl Fredrick, M.D.Chicago, IL 606081467452839
- Erik Kulstad, M.D.Chicago, IL 606081518967751
- Harvey Louzon, M.D.Chicago, IL 606081386669703
Common questions
What is Il Y. Yoo, M.D.'s NPI number?
Il Y. Yoo, M.D.'s National Provider Identifier (NPI) is 1104826254, issued on Jul 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Il Y. Yoo, M.D. located?
The NPPES record lists a practice address at 1501 S California Ave, Chicago, IL, 60608. Phone: (773) 257-6843. Providers update this record themselves, so call before visiting.
How can I verify Il Y. Yoo, M.D.'s license?
NPPES lists Illinois license number 036-052573, 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 Il Y. Yoo, M.D. prescribe under Medicare Part D?
In 2024, Il Y. Yoo, M.D. had 23 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. 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.