Gerald Jay Osher, M.D.
Internal Medicine Physician · Bannockburn, IL
Gerald Jay Osher, M.D. is an internal medicine physician with a practice address in Bannockburn, Illinois, and NPI 1326056136, issued on Aug 4, 2006. Check the license (Illinois 036066116, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gerald Jay Osher
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036066116 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2101 Waukegan RD Ste 200, Bannockburn, IL 60015
- Phone
- (847) 317-1717
- Enumerated
- Aug 4, 2006
- Record last updated
- Dec 19, 2025
- Fax
- (847) 317-9305
- Medicare enrollment
- Enrolled (PECOS I20080729000578); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1980
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify Gerald Jay Osher 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 036066116Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% more Medicare Part D claims than the average internal medicine physician in 2024
5,375 Medicare Part D claims for 344 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 20 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium384 claims
- Atorvastatin Calcium340 claims
- Valsartan167 claims
- Ezetimibe155 claims
- Hydrochlorothiazide145 claims
- Levothyroxine Sodium142 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: $85.70
4 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Brent M Nathan MD PLLCBannockburn, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gerald Jay Osher among 7,238 internal medicine physician records in Illinois
Gerald Jay Osher, 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
- Graduated1980 · median 2003 among the 3,580 with a school on file
- Record last updated2025 · 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).
8 internal medicine physician records list a practice address in Bannockburn
They are 8 of the 177 NPPES records with a practice address in Bannockburn, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Bannockburn → 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 Gerald Jay Osher, M.D.'s NPI number?
Gerald Jay Osher, M.D.'s National Provider Identifier (NPI) is 1326056136, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gerald Jay Osher, M.D. located?
The NPPES record lists a practice address at 2101 Waukegan RD Ste 200, Bannockburn, IL, 60015. Phone: (847) 317-1717. Providers update this record themselves, so call before visiting.
How can I verify Gerald Jay Osher, M.D.'s license?
NPPES lists Illinois license number 036066116, 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 Gerald Jay Osher, M.D. prescribe under Medicare Part D?
In 2024, Gerald Jay Osher, M.D. had 5,375 Medicare Part D claims for 344 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.