WILLIAM P IV HAMMOND (MD) – Medical Oncology Physician, NPI 1740277219
Medical Oncology Physician
Main info
Contacts
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for WILLIAM P IV HAMMOND (MD)
PO BOX 50095
SEATTLE, WA 981455095
Phone: (206) 543-6420
Type: Mailing
Seattle Cancer Care Alliance, 825, Eastlake Avenue East, South Lake Union, Cascade, Capitol Hill, Seattle, King County, Washington, 98109, United States
SEATTLE, WA 981094405
Phone: (206) 288-1000
Type: Location
16233 SYLVESTER RD SW
BURIEN, WA 981663045
Phone: (206) 439-5577
Fax: (253) 426-4142
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 11 Open Payments records for all available years, with a total value of $322.
Total Amount is formed as General ($322) + Research ($0) + Ownership ($0) = $322.
Last reported payment date: 2024-05-16 • Largest payer in this snapshot: Stemline Therapeutics Inc. ($110).
Total Amount
$322
General + Research + Ownership
Payments
11
Total payment records
General Amount
$322
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-05-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Stemline Therapeutics Inc. | $110 |
| GlaxoSmithKline, LLC. | $54 |
| TAIHO ONCOLOGY, INC. | $29 |
| SOBI, INC | $27 |
| Seagen Inc. | $25 |
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: 2019-11-25
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 |
|---|---|---|---|---|
| I20191125001240 | I | Hematology/Oncology | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 42 | 38 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 24 | 20 | $0 |
Insurance plans in this area (ZIP 98145)
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