Bernadette Mayer, MD
Internal Medicine Physician · Chicago, IL
Bernadette Mayer, MD is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1326142654, issued on Sep 8, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Bernadette Mayer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 5365 West Devon Avenue, Chicago, IL 60646
- Phone
- (773) 775-6181
- Enumerated
- Sep 8, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (773) 775-4699
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify Bernadette Mayer 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
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
77 Medicare Part D claims for 16 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Bernadette Mayer among 7,238 internal medicine physician records in Illinois
Bernadette Mayer, MD 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 fileNo · 50% 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 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Andrzej Gacek, M.D.Chicago, IL 606461871543694
- Richard Hayes, M.D.Chicago, IL 606461104924638
- Tony Nahhas, MDChicago, IL 606461285619056
- Serafin Veramendi, M.D.Chicago, IL 606461386738961
- Darius Bartkus, M.D.Chicago, IL 606471093836629
- Stanley Bialowas, MDChicago, IL 606471063518744
- Emily Chacko, M.D.Chicago, IL 606471649205063
- Mauricio Consalter, M.D.Chicago, IL 606471083653927
Common questions
What is Bernadette Mayer, MD's NPI number?
Bernadette Mayer, MD's National Provider Identifier (NPI) is 1326142654, issued on Sep 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bernadette Mayer, MD located?
The NPPES record lists a practice address at 5365 West Devon Avenue, Chicago, IL, 60646. Phone: (773) 775-6181. Providers update this record themselves, so call before visiting.
How can I verify Bernadette Mayer, 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 Bernadette Mayer, MD prescribe under Medicare Part D?
In 2024, Bernadette Mayer, MD had 77 Medicare Part D claims for 16 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.