DR. WEBER CHEN (M.D.) – Hematology & Oncology Physician, NPI 1679504393
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,531 HEMATOLOGY/ONCOLOGY in CA
Provider Addresses for DR. WEBER CHEN (M.D.)
1936 HUNTINGTON DR STE C
SOUTH PASADENA, CA 910304859
Phone: (626) 288-0008
Fax: (866) 741-4630
Type: Location
50 ALESSANDRO PL STE 310
PASADENA, CA 911054000
Phone: (626) 288-0008
Fax: (866) 741-4630
Type: Location
541, West Colorado Street, Glendale, Los Angeles County, California, 91204, United States
STE 205
GLENDALE, CA 912043640
Phone: (323) 254-0046
Fax: (323) 488-9782
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 456 Open Payments records for all available years, with a total value of $10,938.
Total Amount is formed as General ($10,938) + Research ($0) + Ownership ($0) = $10,938.
Last reported payment date: 2024-12-27 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($872).
Total Amount
$10,938
General + Research + Ownership
Payments
456
Total payment records
General Amount
$10,938
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-27
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $872 |
| Merck Sharp & Dohme LLC | $694 |
| Janssen Biotech, Inc. | $692 |
| PFIZER INC. | $485 |
| GlaxoSmithKline, LLC. | $344 |
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: 2004-07-23
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 |
|---|---|---|---|---|
| I20040723001092 | I | Hematology/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 |
|---|---|---|---|---|
| J9263 | Injection, oxaliplatin, 0.5 mg | 7,621 | 12 | $0 |
| J1453 | Injection, fosaprepitant, 1 mg | 3,486 | 11 | $0 |
| J1100 | Injection, dexamethasone sodium phosphate, 1 mg | 3,146 | 56 | $0 |
| J0897 | Injection, denosumab, 1 mg | 2,742 | 23 | $0 |
| J2469 | Injection, palonosetron hcl, 25 mcg | 1,129 | 40 | $0 |
Insurance plans in this area (ZIP 91030)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HEMATOLOGY/ONCOLOGY | CA | 96367 | Infusion into a vein for therapy prevention or diagnosis additional sequential infusion up to 1 hour | 208 | 27 |
| HEMATOLOGY/ONCOLOGY | CA | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 239 | 25 |
| HEMATOLOGY/ONCOLOGY | CA | 96415 | Infusion of chemotherapy into a vein | 166 | 20 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Gynecological Oncology | CA | |
| Medical Oncology | CA | |
| Hematology/Oncology, Internal Medicine | CA | |
| Nurse Practitioner | CA | |
| Hematology/Oncology, Internal Medicine | CA | |
| H E M A T O L O G Y/ O N C O L O G Y | CA | |
| Gynecological Oncology | PA | |
| Gynecological Oncology, Obstetrics/Gynecology | CA | |
| Internal Medicine | CA | |
| H E M A T O L O G Y/ O N C O L O G Y | CA |
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