DR. DIANE C. TSAI (M.D.) – Radiation Oncology Physician, NPI 1730266966
Radiation Oncology Physician
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Profile Insights
NPPES metrics only — not quality of care.
184 RADIATION ONCOLOGY in WA
Provider Addresses for DR. DIANE C. TSAI (M.D.)
4230 BRIDGEPORT WAY W STE B
UNIVERSITY PLACE, WA 984664335
Phone: (253) 779-6301
Fax: (253) 627-8792
Type: Mailing
1900 NW MYHRE RD
SILVERDALE, WA 983837662
Phone: (564) 240-3100
Fax: (564) 240-3198
Type: Location
1900 NW Myhre Rd
Silverdale, WA 983837662
Phone: (564) 240-3100
Fax: (564) 240-3198
Type: Location
3301 Squalicum Pkwy
Bellingham, WA 982251919
Phone: (360) 788-8222
Type: Location
2000 Hospital Dr
Sedro Woolley, WA 982844327
Phone: (360) 856-7518
Type: Location
500 NE MULTNOMAH ST STE 100
PORTLAND, OR 972322031
Phone: (800) 813-2000
Fax: (855) 524-5255
Type: Mailing
3620 N INTERSTATE AVE
PORTLAND, OR 972271106
Phone: (503) 813-2000
Type: Location
Richard T. Jones Hall, 3181, Southwest Sam Jackson Park Road, Marquam Hill, Homestead, Portland, Metro, Multnomah County, Oregon, 97239, United States
MAIL CODE CR145
PORTLAND, OR 972393011
Phone: (503) 494-8758
Fax: (503) 346-0237
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $26.
Total Amount is formed as General ($26) + Research ($0) + Ownership ($0) = $26.
Last reported payment date: 2024-04-23 • Largest payer in this snapshot: Siemens Medical Solutions USA, Inc. ($26).
Total Amount
$26
General + Research + Ownership
Payments
1
Total payment records
General Amount
$26
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Siemens Medical Solutions USA, Inc. | $26 |
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: 2018-07-02
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 |
|---|---|---|---|---|
| I20031209000735 | I | Radiation Oncology | CA | TBD |
| I20111128000261 | I | Radiation Oncology | HI | TBD |
| I20151002002628 | I | Radiation Oncology | OR | TBD |
| I20180702002294 | I | Radiation Oncology | WA | 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 |
|---|---|---|---|---|
| 77014 | Ct guidance for insertion of radiation therapy fields | 785 | 134 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 198 | 99 | $0 |
| 77300 | Calculation of radiation therapy dose | 129 | 40 | $0 |
| G6002 | Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 121 | 25 | $0 |
| 77334 | Design and construction of complex radiation treatment device | 58 | 24 | $0 |
Insurance plans in this area (ZIP 98466)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| RADIATION ONCOLOGY | OR | 77427 | Radiation treatment management, 5 treatments | 19 | 13 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Infectious Disease | CO | |
| Physician Assistant | HI | |
| - | HI | |
| - | WV | |
| U R O L O G Y | IL | |
| - | HI | |
| Physician Assistant | NY | |
| U R O L O G Y | WA | |
| Physician Assistant | HI | |
| Nurse Practitioner | HI |
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