DR. WILLIAM H. ISACOFF (M.D.) – Hematology & Oncology Physician, NPI 1891773123
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for DR. WILLIAM H. ISACOFF (M.D.)
Westwood Medical Plaza, 10921, Wilshire Boulevard, Westwood Village, Westwood, Los Angeles, Los Angeles County, California, 90024, United States
SUITE 505
LOS ANGELES, CA 900244001
Phone: (310) 824-4133
Fax: (310) 208-1584
Type: Mailing
2811 WILSHIRE BLVD STE 414
SANTA MONICA, CA 904034804
Phone: (310) 824-4133
Fax: (310) 201-6685
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 73 Open Payments records for all available years, with a total value of $1,748.
Total Amount is formed as General ($1,748) + Research ($0) + Ownership ($0) = $1,748.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($158).
Total Amount
$1,748
General + Research + Ownership
Payments
73
Total payment records
General Amount
$1,748
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2010-03-29
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 |
|---|---|---|---|---|
| I20100329000832 | I | Medical Oncology | CA | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 90024)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| MEDICAL ONCOLOGY | CA | 96367 | Infusion into a vein for therapy prevention or diagnosis additional sequential infusion up to 1 hour | 273 | 68 |
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