Jack Leong, MD
Pediatrics Physician · Chicago, IL
Jack Leong, MD is a pediatrics physician with a practice address in Chicago, Illinois, and NPI 1174506513, issued on Nov 21, 2005. Check the license (Illinois 036070436, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jack Leong
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 036070436 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3000 N Cicero Ave, Chicago, IL 60641
- Phone
- (773) 282-3115
- Enumerated
- Nov 21, 2005
- Record last updated
- Oct 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (773) 282-0590
- Medicare enrollment
- Enrolled (PECOS I20090401000309); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,176 in Illinois → Look up another NPI →
Also registered at 3000 N Cicero Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Luis Cruz, PAPhysician Assistant1477324754
- Karen CunninghamFamily Nurse Practitioner1609451251
Verify Jack Leong 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 036070436Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average pediatrics physician in 2024
1,381 Medicare Part D claims for 103 beneficiaries, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Simvastatin106 claims
- Lisinopril97 claims
- Metformin Hcl88 claims
- Trulicity50 claims
- Albuterol Sulfate Hfa43 claims
- Atorvastatin Calcium43 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.
Industry payments in 2024: $728.10
15 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Exclusive Physicians - Illinois PLLCChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jack Leong among 3,176 pediatrics physician records in Illinois
Jack Leong, MD is one of 3,176 pediatrics physician records with a practice address in Illinois. 32% 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, 92% newer
- In a Medicare fileYes · 32% of these records are
- In the CMS Doctors and Clinicians fileYes · 7% of these records are
- Graduated1982 · median 2010 among the 235 with a school on file
- Record last updated2020 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,142 pediatrics physician records list a practice address in Chicago
They are 1,142 of the 63,379 NPPES records with a practice address in Chicago, and 3,176 pediatrics physician records in Illinois.
All 3,176 in Illinois → Every provider in Chicago → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
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- Barbara Bayldon, MDChicago, IL 606401659320356
- Jennifer Bergquist, M.D.Chicago, IL 606421508973827
- Constance Blade, MDChicago, IL 606421669442521
- Danielle Cherian, M.D.Chicago, IL 606421063575439
- Christine Cosgrove, APRN, CPNPChicago, IL 606401093093221
- Hawa ForkpaChicago, IL 606401194119123
Common questions
What is Jack Leong, MD's NPI number?
Jack Leong, MD's National Provider Identifier (NPI) is 1174506513, issued on Nov 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jack Leong, MD located?
The NPPES record lists a practice address at 3000 N Cicero Ave, Chicago, IL, 60641. Phone: (773) 282-3115. Providers update this record themselves, so call before visiting.
How can I verify Jack Leong, MD's license?
NPPES lists Illinois license number 036070436, 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 Jack Leong, MD prescribe under Medicare Part D?
In 2024, Jack Leong, MD had 1,381 Medicare Part D claims for 103 beneficiaries; the average among pediatrics physician prescribers was 375. 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.