Leslie Jay Block, MD
Pediatric Otolaryngology Physician · Lake Forest, IL
Leslie Jay Block, MD is a pediatric otolaryngology physician with a practice address in Lake Forest, Illinois, and NPI 1750300166, issued on Jul 18, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Leslie Jay Block
- Credential
- MD
- Primary taxonomy
- Pediatric Otolaryngology Physician 207YP0228X
- Practice location
- 700 N Westmoreland RD, Lake Forest, IL 60045
- Phone
- (847) 295-1114
- Enumerated
- Jul 18, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (847) 295-9373
- Medicare enrollment
- Enrolled (PECOS I20101030000216); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatric otolaryngology physician records → All 29 in Illinois → Look up another NPI →
Also registered at 700 N Westmoreland RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kurt Brotherson, MDInternal Medicine Physician1306907779
- Allen Carlins, M.D.Otolaryngology Physician1073547469
- Landon Duyka, M.D.Otolaryngology Physician1194921924
- Richard Siebert, M.D.Internal Medicine Physician1205985157
- Anthony Terrasse, M.D.Plastic Surgery Physician1477544302
Verify Leslie Jay Block in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average pediatric otolaryngology physician in 2024
32 Medicare Part D claims for 20 beneficiaries, against an average of 129 among the 135 providers of this specialty who prescribed in Part D.
Most prescribed
- Betamethasone Valerate14 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
- Lake County Head And Neck Specialists S.C.Libertyville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leslie Jay Block among 29 pediatric otolaryngology physician records in Illinois
Leslie Jay Block, MD is one of 29 pediatric otolaryngology physician records with a practice address in Illinois. 52% 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 28% of them.
- NPI issued2006 · 28% of these records are older, 48% newer
- In a Medicare fileYes · 52% of these records are
- In the CMS Doctors and Clinicians fileYes · 28% of these records are
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207YP0228X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Otolaryngology Physician providers in Illinois
There are 29 pediatric otolaryngology physician records in Illinois.
All 29 in Illinois → Every provider in Lake Forest → Pediatric Otolaryngology Physician nationwide →
The 8 pediatric otolaryngology physician records with the nearest ZIP codes
- Judy Chen, M.D.Lake Bluff, IL 600441639229750
- David Walner, M.D.Park Ridge, IL 600681730171018
- Sukaina Hasnie, MDWilmette, IL 600911811489016
- Shilpa Cherukupally, MDLombard, IL 601481013982578
- Andrew Hotaling, MDMaywood, IL 601531912984261
- Laura Swibel Rosenthal, M.D.Maywood, IL 601531497966584
- Ilana Seligman, MDEvanston, IL 602011295720159
- Carol Gerson, MDRiver Forest, IL 603051356336168
Common questions
What is Leslie Jay Block, MD's NPI number?
Leslie Jay Block, MD's National Provider Identifier (NPI) is 1750300166, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leslie Jay Block, MD located?
The NPPES record lists a practice address at 700 N Westmoreland RD, Lake Forest, IL, 60045. Phone: (847) 295-1114. Providers update this record themselves, so call before visiting.
How can I verify Leslie Jay Block, MD's license?
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 Leslie Jay Block, MD prescribe under Medicare Part D?
In 2024, Leslie Jay Block, MD had 32 Medicare Part D claims for 20 beneficiaries; the average among pediatric otolaryngology physician prescribers was 129. 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.