James Dan, MD
Geriatric Medicine (Internal Medicine) Physician · Downers Grove, IL
James Dan, MD is a geriatric medicine (internal medicine) physician with a practice address in Downers Grove, Illinois, and NPI 1841265964, issued on Feb 22, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- James Dan
- Credential
- MD
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- Practice location
- 3743 Highland Ave, Downers Grove, IL 60515
- Phone
- (630) 435-9888
- Enumerated
- Feb 22, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 179 in Illinois → Look up another NPI →
Also registered at 3743 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Badri, M.D.Internal Medicine Physician1912985722
- Natalie Dekoker, RN, CDERegistered Dietitian1679852446
- Kathleen Gruzalski, MDPediatrics Physician1396710356
- Altrovise Martin, PMHNPPsychiatric/Mental Health Nurse Practitioner1740972348
- Richard McPartlin, MDInternal Medicine Physician1700853140
- Kathy O'Grady, NPNurse Practitioner1942235908
Verify James Dan 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
100% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
11 Medicare Part D claims, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
James Dan among 179 geriatric medicine (internal medicine) physician records in Illinois
James Dan, MD is one of 179 geriatric medicine (internal medicine) physician records with a practice address in Illinois. 71% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 40% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 42% of these records are
- Record last updated2007 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Illinois
There are 179 geriatric medicine (internal medicine) physician records in Illinois.
All 179 in Illinois → Every provider in Downers Grove → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Lawrence Lapalio, MDHinsdale, IL 605211427006774
- Peter Norvid, MDLa Grange, IL 605251508824111
- Louis Waldman, M.D.La Grange, IL 605251588981526
- Gary McCray, M.D.La Grange Park, IL 605261023025541
- Vyjayanthi Atluri, MDBurr Ridge, IL 605271023067311
- Shahla Nyaeme, MDBurr Ridge, IL 605271720036528
- Emmanuel PaintsilBurr Ridge, IL 605271942277231
- Rahmawati Sih, MDBurr Ridge, IL 605271346290707
Common questions
What is James Dan, MD's NPI number?
James Dan, MD's National Provider Identifier (NPI) is 1841265964, issued on Feb 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Dan, MD located?
The NPPES record lists a practice address at 3743 Highland Ave, Downers Grove, IL, 60515. Phone: (630) 435-9888. Providers update this record themselves, so call before visiting.
How can I verify James Dan, 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 James Dan, MD prescribe under Medicare Part D?
In 2024, James Dan, MD had 11 Medicare Part D claims; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.