BENJAMIN LEACH (M.D.) – Hematology & Oncology Physician, NPI 1497026140
Hematology & Oncology Physician
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Profile Insights
NPPES metrics only — not quality of care.
550 MEDICAL ONCOLOGY in CA
Provider Addresses for BENJAMIN LEACH (M.D.)
1100 San Bernardino Road
Suite 1100
Upland, CA 917864952
Phone: (909) 949-2242
Fax: (909) 981-5783
Type: Location
PO BOX 512185
LOS ANGELES, CA 900510185
Phone:
Type: Mailing
15031 RINALDI ST STE 150
MISSION HILLS, CA 913451207
Phone: (818) 660-4700
Fax: (818) 837-1987
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 15 Open Payments records for all available years, with a total value of $6,003.
Total Amount is formed as General ($6,003) + Research ($0) + Ownership ($0) = $6,003.
Last reported payment date: 2024-10-25 • Largest payer in this snapshot: GENZYME CORPORATION ($3,157).
Total Amount
$6,003
General + Research + Ownership
Payments
15
Total payment records
General Amount
$6,003
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GENZYME CORPORATION | $3,157 |
| AstraZeneca Pharmaceuticals LP | $2,220 |
| Kite Pharma, Inc. | $150 |
| JAZZ PHARMACEUTICALS INC. | $144 |
| BeiGene USA, Inc. | $125 |
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: 2017-09-06
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 |
|---|---|---|---|---|
| I20170906003583 | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| J0881 | Injection, darbepoetin alfa, 1 microgram (non-esrd use) | 15,700 | 12 | $0 |
| J9271 | Injection, pembrolizumab, 1 mg | 13,400 | 19 | $0 |
| J9267 | Injection, paclitaxel, 1 mg | 9,411 | 12 | $0 |
| J0185 | Injection, aprepitant, 1 mg | 6,240 | 15 | $0 |
| J0897 | Injection, denosumab, 1 mg | 5,040 | 33 | $0 |
Insurance plans in this area (ZIP 91786)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| Nurse Practitioner | CA | |
| Cardiovascular Disease (Cardiology) | CA | |
| Hematology/Oncology, Internal Medicine | CA | |
| - | CA | |
| Nurse Practitioner | CA | |
| Certified Registered Nurse Anesthetist (Crna) | CA | |
| Endocrinology, Internal Medicine | CA | |
| General Surgery | CA | |
| Certified Registered Nurse Anesthetist (Crna) | PA |
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