MS. SHARON A. WESTERBERG (PA-C) – Hematology & Oncology Physician, NPI 1629097191
Hematology & Oncology Physician
Main info
Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
10,570 PHYSICIAN ASSISTANT in CA
Provider Addresses for MS. SHARON A. WESTERBERG (PA-C)
2100 MAIN ST STE 300
HUNTINGTON BEACH, CA 926482489
Phone: (714) 252-9415
Fax: (714) 963-8407
Type: Location
PO BOX 512185
LOS ANGELES, CA 900510185
Phone:
Type: Mailing
West Romneya Drive, Anaheim, Orange County, California, 92801, United States
203
ANAHEIM, CA 928011830
Phone: (714) 999-1465
Fax: (714) 999-1701
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 281 Open Payments records for all available years, with a total value of $7,613.
Total Amount is formed as General ($7,613) + Research ($0) + Ownership ($0) = $7,613.
Last reported payment date: 2024-12-23 • Largest payer in this snapshot: Incyte Corporation ($589).
Total Amount
$7,613
General + Research + Ownership
Payments
281
Total payment records
General Amount
$7,613
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Incyte Corporation | $589 |
| Gilead Sciences, Inc. | $549 |
| AstraZeneca Pharmaceuticals LP | $447 |
| Astellas Pharma US Inc | $337 |
| PUMA BIOTECHNOLOGY, INC. | $298 |
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: 2004-04-17
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 |
|---|---|---|---|---|
| I20040417000621 | I | Physician Assistant | 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 92648)
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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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