David Robert Buyer, M.D.
Internal Medicine Physician · Chicago, IL
David Robert Buyer, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1831164888, issued on Feb 22, 2006. Check the license (Illinois 036092425, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- David Robert Buyer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036092425 IL
Self-reported in NPPES; status is on the state search - Practice location
- 850 S Wabash Ave Ste 210, Chicago, IL 60605
- Phone
- (312) 598-3520
- Enumerated
- Feb 22, 2006
- Record last updated
- Mar 18, 2025
- Fax
- (312) 598-3525
- Medicaid ID
- 036092425 IL
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 850 S Wabash Ave Ste 210
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Young, MDPhysical Medicine & Rehabilitation Physician1588650188
Verify David Robert Buyer 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 036092425Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average internal medicine physician in 2024
3,212 Medicare Part D claims for 192 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. 79 claims were for opioids.
Most prescribed
- Atorvastatin Calcium280 claims
- Amlodipine Besylate165 claims
- Losartan Potassium119 claims
- Rosuvastatin Calcium99 claims
- Levothyroxine Sodium96 claims
- Eliquis72 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.
David Robert Buyer among 7,238 internal medicine physician records in Illinois
David Robert Buyer, 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 fileNo · 50% of these records are
- 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).
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
- Maliha Abbas, D.O.Chicago, IL 606051174963920
- John Acquaye-Awah, M.D.Chicago, IL 606051386660322
- Arthur Funk, M.D.Chicago, IL 606051750573465
- Kumail Haider, DOChicago, IL 606051598460982
- Danica Milenkovich, M.D.Chicago, IL 606051114902632
- Caroline Nawara, M.D.Chicago, IL 606051851388995
- Nicholas Stiso, MDChicago, IL 606051114928835
- Gerasim Tikoff, M.D.Chicago, IL 606051871898379
Common questions
What is David Robert Buyer, M.D.'s NPI number?
David Robert Buyer, M.D.'s National Provider Identifier (NPI) is 1831164888, issued on Feb 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Robert Buyer, M.D. located?
The NPPES record lists a practice address at 850 S Wabash Ave Ste 210, Chicago, IL, 60605. Phone: (312) 598-3520. Providers update this record themselves, so call before visiting.
How can I verify David Robert Buyer, M.D.'s license?
NPPES lists Illinois license number 036092425, 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 David Robert Buyer, M.D. prescribe under Medicare Part D?
In 2024, David Robert Buyer, M.D. had 3,212 Medicare Part D claims for 192 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.