TIMOTHY S CHEN M.D.
NPI 1841234937
Radiology - Diagnostic Radiology in Appleton, WI

Q: What is Timothy Chen's NPI number?

The NPI number for Timothy Chen is 1841234937. It was assigned to this individual provider in the NPPES registry on June 16, 2006.

Q: What is Timothy Chen's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Timothy Chen was last updated on January 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 16, 2006PECOS EnrolledAccepts Medicare Assignment

4321 W COLLEGE AVE, STE 300, APPLETON, WI 54914(920) 739-5642(920) 968-0259 Get Directions Write a Review

NPPES record last updated: January 11, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Timothy S Chen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TIMOTHY S CHEN M.D. (NPI 1841234937) is an individual diagnostic radiology provider in Appleton, Wisconsin, licensed in Wisconsin (48268) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Winona Health Services, and is a graduate of Indiana University School Of Medicine (1999).

NPPES Registry Identity

NPI1841234937

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameTIMOTHY S CHENCredential: M.D.

Location Address4321 W COLLEGE AVE, STE 300Appleton, WI 54914-3966

Mailing AddressPo Box 117Appleton, WI 54912-0117 · (920) 739-5642 · Fax (920) 968-0259

Phone(920) 739-5642

Fax(920) 968-0259

Sole ProprietorNo

Medical School CMSIndiana University School Of MedicineGraduated 1999

Enumeration DateJune 16, 2006

Last NPPES UpdateJanuary 11, 2012

✔ NPI 1841234937 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

License✔ Licensed in WI · 48268

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

4321 W COLLEGE AVE, Appleton, WI 54914

Open in Google Maps ↗

Other Identifiers 3

Medicare UPINI31197WI

Medicare PIN002645072WI

Medicaid34655900WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Timothy S Chen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3173568979

PECOS Enrollment IDI20050622000857

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Timothy Chen reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Neuroscience Group Of Northeast Wisconsin Sc

3.2 mi

Neurological Surgery

1305 W. AMERICAN DRIVE
Neenah, WI 54956

Reassigned Medicare billing, Wisconsin enrollment
82 clinicians in this Medicare group

NPI 1578516803 (800) 201-1194

Radiology Associates Of Appleton, S.C.

5.7 mi

Radiation Oncology

2500 E CAPITOL DR
Appleton, WI 54911

Reassigned Medicare billing, Wisconsin enrollment
Medicare enrollment name: Radiology Associates Of Appleton Sc
61 clinicians in this Medicare group

NPI 1407941909 (833) 639-0141

Wisconsin Radiology Specialists, S C

77 mi

Specialist

10945 N PORT WASHINGTON RD STE 201
Mequon, WI 53092

Reassigned Medicare billing, Wisconsin enrollment
Medicare enrollment name: Premier Radiology Wisconsin LLC
237 clinicians in this Medicare group

NPI 1568446003 (262) 292-3151

Tomah Memorial Hospital Inc

104 mi

Critical Access

501 GOPHER DR
Tomah, WI 54660

Reassigned Medicare billing, Wisconsin enrollment
Also billed through NPI 1184765240 (Wisconsin)
249 clinicians in this Medicare group

NPI 1992970453 (608) 372-2181

Black River Health Inc

118 mi

Medicare Defined Swing Bed Unit

711 W ADAMS ST
Black River Falls, WI 54615

Reassigned Medicare billing, Wisconsin enrollment
Also billed through NPI 1811940331 (Wisconsin)
227 clinicians in this Medicare group

NPI 1003914011 (715) 284-5361

Imaging Associates Of Michigan PLLC

166 mi

Diagnostic Radiology

850 W BARAGA AVE
Marquette, MI 49855

Reassigned Medicare billing, Wisconsin enrollment
17 clinicians in this Medicare group

NPI 1164943007 (906) 214-2900

Specialists In Medical Imaging Sc

193 mi

Diagnostic Radiology

20201 CRAWFORD AVE
Olympia Fields, IL 60461

Reassigned Medicare billing, Wisconsin enrollment
16 clinicians in this Medicare group

NPI 1841687951 (708) 747-4000

Hurley Medical Center

243 mi

Urgent Care

8759 MONROE RD
Durand, MI 48429

Reassigned Medicare billing, Michigan enrollment
467 clinicians in this Medicare group

NPI 1962937425 (810) 262-2710

Imaging Associates Of Indiana, PC

322 mi

Diagnostic Radiology

2001 W 86TH ST
Indianapolis, IN 46260

Reassigned Medicare billing, Wisconsin enrollment
20 clinicians in this Medicare group

NPI 1699072611 (219) 767-6320

Medical X-Ray Consultants, Ltd

356 mi

Vascular & Interventional Radiology

111 17TH AVE E
Alexandria, MN 56308

Reassigned Medicare billing, Minnesota and Wisconsin enrollments
10 clinicians in this Medicare group

NPI 1386601383 (715) 295-9431

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 32

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

268 services235 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

107 services104 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

99 services95 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

88 services85 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

53 services53 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

49 services44 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

45 services42 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

43 services43 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

42 services39 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

41 services39 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

40 services40 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

37 services37 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

34 services34 patients

Mri scan of leg joint without contrast 73721

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

30 services29 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

27 services27 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

25 services21 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

25 services22 patients

Mri scan of arm joint without contrast 73221

An MRI scan of the arm joint is a non-invasive imaging procedure that uses magnetic fields and radio waves to create detailed images of the structures within your arm joint. No contrast dye is used in this process. It helps to diagnose or monitor conditions like arthritis, injuries, or infections.

23 services23 patients

Ct scan of arm without contrast 73200

A CT scan of the arm without contrast is a non-invasive imaging test. It uses X-ray technology to capture detailed images of your arm's structures. It doesn't involve any contrasting dye, hence, minimal preparation is required. It helps in diagnosing injuries or conditions affecting the arm.

22 services21 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

21 services21 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

19 services18 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

19 services19 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

19 services19 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

17 services15 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

17 services17 patients

Dxa bone density measurement of hip, pelvis, spine 77080

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

15 services15 patients

Nuclear medicine study of bone and/or joint whole body 78306

A nuclear medicine study of bone and/or joint whole body involves injecting a small amount of radioactive material into your body. This material travels to your bones and emits energy. A special camera captures this energy, creating images of your bones to help identify any abnormalities.

14 services13 patients

Ct scan of leg without contrast 73700

A CT scan of the leg is a non-invasive imaging test that uses X-rays to capture detailed images of your leg's bones, muscles, and blood vessels. It doesn't use contrast dye and doesn't cause any pain. It helps in diagnosing injuries or diseases.

13 services12 patients

X-ray of chest, 2 views 71046

12 services12 patients

X-ray of wrist, minimum of 3 views 73110

An X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.

12 services12 patients

X-ray of lower leg, 2 views 73590

An X-ray of the lower leg, 2 views, is a quick, painless test that produces images of the bones in your lower leg. It helps to identify fractures, infections, or diseases. Two different angles are used to provide a comprehensive view of the leg's structure.

12 services11 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Winona Health Services

Acute Care Hospitals · Winona, MN

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number240044

Location855 Mankato AvenueWinona, MN 55987 · Winona County

Emergency services Birthing friendly

Ascension Columbia St Mary's Hospital Milwaukee

Acute Care Hospitals · Milwaukee, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number520051

Location2323 N Lake DrMilwaukee, WI 53211 · Milwaukee County

Emergency services Birthing friendly

Ascension All Saints Hospital

Acute Care Hospitals · Racine, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number520096

Location3801 Spring StRacine, WI 53405 · Racine County

Emergency services Birthing friendly

Spooner Health System

Critical Access Hospitals · Spooner, WI

OwnershipVoluntary non-profit - Private

CMS Certification Number521332

Location1280 Chandler DrSpooner, WI 54801 · Washburn County

Emergency services

Cumberland Memorial Hospital

Critical Access Hospitals · Cumberland, WI

OwnershipVoluntary non-profit - Other

CMS Certification Number521353

Location1705 16th AveCumberland, WI 54829 · Barron County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54914 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$82.92 typical visit price

range $53.90 – $163.24

Typical copayment $20.73 (range $13.47 – $40.81)

Most-billed visit code 99203

Established Patient

$67.37 typical visit price

range $17.40 – $133.76

Typical copayment $16.84 (range $4.35 – $33.44)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PROGRESS PATH ABA CORP

Community/Behavioral Health

4321 W COLLEGE AVE
APPLETON, WI 54914

Outagamie County (920) 757-2400

PRN HEALTH SERVICES, INC.

Nursing Care

4321 W COLLEGE AVE, SUITE 200
APPLETON, WI 54914

Outagamie County (888) 830-8811

CENTRAL ORTHOPEDIC NETWORK, LLC

Durable Medical Equipment & Medical Supplies

4321 W COLLEGE AVE
APPLETON, WI 54914

Outagamie County (833) 715-0728

BADGER IOM, LLC

Psychiatry & Neurology (Clinical Neurophysiology)

4321 W COLLEGE AVE, SUITE 200
APPLETON, WI 54914

Outagamie County (210) 598-4277

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Timothy Chen's NPI number?

The NPI number for Timothy Chen is 1841234937. It was assigned to this individual provider in the NPPES registry on June 16, 2006.

Where is Timothy Chen located?

Timothy Chen practices at 4321 W College Ave Ste 300, Appleton, WI 54914. The listed phone number is (920) 739-5642.

What is Timothy Chen's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Timothy Chen enrolled in Medicare?

Yes. Timothy Chen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Timothy Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Chen reassigns Medicare benefits to 10 organizations: The Neuroscience Group Of Northeast Wisconsin Sc (Neenah, WI), Radiology Associates Of Appleton, S.C. (Appleton, WI), Wisconsin Radiology Specialists, S C (Mequon, WI), Tomah Memorial Hospital Inc (Tomah, WI), Black River Health Inc (Black River Falls, WI) and 5 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Timothy Chen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Timothy Chen accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and CareSource (Common Ground Healthcare) list Timothy Chen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Timothy Chen affiliated with any hospitals?

According to CMS data, Timothy Chen is affiliated with Winona Health Services, Ascension Columbia St Mary's Hospital Milwaukee, Ascension All Saints Hospital, Spooner Health System and Cumberland Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Timothy Chen was last updated on January 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.