TIMOTHY S CHEN (M.D.) – Diagnostic Radiology Physician, NPI 1841234937
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,101 DIAGNOSTIC RADIOLOGY in WI
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Provider Addresses for TIMOTHY S CHEN (M.D.)
West College Avenue, Appleton, Outagamie County, Wisconsin, 54911-5570, United States
STE 300
APPLETON, WI 549143966
Phone: (920) 739-5642
Fax: (920) 968-0259
Type: Location
117, Mitchell Hill Road, Appleton, Knox County, Maine, 04862, United States
APPLETON, WI 549120117
Phone: (920) 739-5642
Fax: (920) 968-0259
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-06-22
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050622000857 | I | Diagnostic Radiology | WI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 71045 | X-ray of chest, 1 view | 270 | 236 | $0 |
| 71046 | X-ray of chest, 2 views | 168 | 163 | $0 |
| 74177 | Ct scan of abdomen and pelvis with contrast | 125 | 122 | $0 |
| 70450 | Ct scan head or brain without contrast | 97 | 96 | $0 |
| 73502 | X-ray of hip, 2-3 views | 87 | 85 | $0 |
Insurance plans in this area (ZIP 54914)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | WI | 73630 | X-ray of foot, minimum of 3 views | 13 | 12 |
| DIAGNOSTIC RADIOLOGY | WI | 74177 | CT scan of abdomen and pelvis with contrast | 35 | 35 |
| DIAGNOSTIC RADIOLOGY | WI | 93971 | Ultrasound scan of veins of one arm or leg or limited including assessment of compression and functional maneuvers | 12 | 12 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | WI | |
| - | WI | |
| Diagnostic Radiology | WI | |
| Family Practice | WI | |
| Nurse Practitioner | WI | |
| - | WI | |
| Family Practice | MN | |
| Nurse Practitioner | WI | |
| P A T H O L O G Y | WI | |
| - | WI |
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