Timothy S. Chen, M.D.
Diagnostic Radiology Physician · Appleton, WI
Timothy S. Chen, M.D. is a diagnostic radiology physician with a practice address in Appleton, Wisconsin, and NPI 1841234937, issued on Jun 16, 2006. Check the license (Wisconsin 48268, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Timothy S. Chen
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 48268 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4321 W College Ave, Appleton, WI 54914
- Phone
- (920) 739-5642
- Enumerated
- Jun 16, 2006
- Record last updated
- Jan 11, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (920) 968-0259
- Medicaid ID
- 34655900 WI
- Medicare enrollment
- Enrolled (PECOS I20050622000857); accepts Medicare assignment
- Medical or professional school
- Indiana University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,005 in Wisconsin → Look up another NPI →
Verify Timothy S. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 48268Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 4 group practices
- Medical X-Ray Consultants LtdStanley, WI
- Premier Radiology Wisconsin LLCMount Pleasant, WI
- Radiology Associates OF Appleton SCShawano, WI
- Tomah Memorial Hospital IncTomah, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy S. Chen among 1,005 diagnostic radiology physician records in Wisconsin
Timothy S. Chen, M.D. is one of 1,005 diagnostic radiology physician records with a practice address in Wisconsin. 68% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1999 · median 2006 among the 664 with a school on file
- Record last updated2012 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in Wisconsin
There are 1,005 diagnostic radiology physician records in Wisconsin.
All 1,005 in Wisconsin → Every provider in Appleton → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Stephen Bejvan, M.D.Appleton, WI 549131356379762
- Timothy Bernauer, M.D.Appleton, WI 549131609815265
- Robert Brucker, M.D.Appleton, WI 549131972530004
- Keyvan Gharabeighlou, D.O.Appleton, WI 549131376588202
- Brian Hebl, M.D.Appleton, WI 549131578599684
- John Iglar, M.D.Appleton, WI 549131760419519
- Gregory Knudson, M.D.Appleton, WI 549131457395519
- Stephanus Macrander, M.D.Appleton, WI 549131033153853
Common questions
What is Timothy S. Chen, M.D.'s NPI number?
Timothy S. Chen, M.D.'s National Provider Identifier (NPI) is 1841234937, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Timothy S. Chen, M.D. located?
The NPPES record lists a practice address at 4321 W College Ave, Appleton, WI, 54914. Phone: (920) 739-5642. Providers update this record themselves, so call before visiting.
How can I verify Timothy S. Chen, M.D.'s license?
NPPES lists Wisconsin license number 48268, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.