DR. TIMOTHY LEONOR TAN (D.O.) – Dermatopathology (Pathology) Physician, NPI 1205272507
Dermatopathology (Pathology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
191 PATHOLOGY in OR
Provider Addresses for DR. TIMOTHY LEONOR TAN (D.O.)
9750 SW Nimbus Ave
Beaverton, OR 970087172
Phone: (503) 906-7300
Fax: (503) 245-8219
Type: Location
3131 S State St Ste 309
Ann Arbor, MI 481081658
Phone: (503) 245-8219
Fax: (503) 245-8219
Type: Location
1633 Medical Center Pt
Colorado Springs, CO 809075700
Phone: (503) 906-7300
Fax: (503) 245-8219
Type: Location
251 E Huron St
Chicago, IL 606112908
Phone: (312) 926-2000
Type: Location
251 E HURON ST
CHICAGO, IL 606112908
Phone: (312) 926-2000
Type: Mailing
PO BOX 230457
PORTLAND, OR 972810457
Phone: (503) 906-7300
Fax: (503) 245-8219
Type: Mailing
2815 EASTLAKE AVE E STE 240
SEATTLE, WA 981023086
Phone: (503) 906-7300
Fax: (503) 245-8219
Type: Location
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.
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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: 2025-12-10
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 4 Medicare enrollment records; no due dates published yet.
Enrollment records
4
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 |
|---|---|---|---|---|
| I20200616002534 | I | Pathology | IL | TBD |
| I20240501002178 | I | Pathology | IN | TBD |
| I20251203002371 | I | Pathology | MI | TBD |
| I20251210000697 | I | Pathology | OR | 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 |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 808 | 525 | $0 |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | 83 | 76 | $0 |
| 88341 | Special stained specimen slides to examine tissue, each additional procedure | 57 | 20 | $0 |
| 88312 | Special stained specimen slides to identify organisms including interpretation and report | 21 | 14 | $0 |
| 88304 | Pathology examination of tissue using a microscope, moderately low complexity | 14 | 14 | $0 |
Insurance plans in this area (ZIP 97008)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| P A T H O L O G Y | MI | |
| Oral And Maxillofacial Pathology | OR | |
| - | OR | |
| P A T H O L O G Y | CO | |
| P A T H O L O G Y | OR | |
| P A T H O L O G Y | MI | |
| P A T H O L O G Y | AP | |
| Dermatology, Pathology | MI | |
| Pathology, Dermatology | IL |
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