OSCAR A DIAZ (N.P.) – Nurse Practitioner, NPI 1043980980
Nurse Practitioner
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
16,360 NURSE PRACTITIONER in CA
Provider Addresses for OSCAR A DIAZ (N.P.)
PO BOX 9602
MISSION HILLS, CA 913469602
Phone: (818) 837-5559
Fax: (818) 792-4793
Type: Mailing
11133 N SEPULVEDA BLVD
MISSION HILLS, CA 91346
Phone: (818) 837-5785
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 86 Open Payments records for all available years, with a total value of $1,240.
Total Amount is formed as General ($1,240) + Research ($0) + Ownership ($0) = $1,240.
Last reported payment date: 2024-11-27 • Largest payer in this snapshot: Amgen Inc. ($623).
Total Amount
$1,240
General + Research + Ownership
Payments
86
Total payment records
General Amount
$1,240
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-27
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Amgen Inc. | $623 |
| Lilly USA, LLC | $391 |
| Bayer Healthcare Pharmaceuticals Inc. | $68 |
| Merck Sharp & Dohme LLC | $32 |
| PFIZER INC. | $30 |
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: 2021-10-15
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 |
|---|---|---|---|---|
| I20211015001074 | I | Nurse Practitioner | 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 91346)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | CA | |
| Nurse Practitioner | CA | |
| Internal Medicine | CA | |
| General Practice | CA | |
| Family Practice | CA | |
| Family Practice | CA | |
| Nurse Practitioner | CA | |
| Nurse Practitioner | CA | |
| Nurse Practitioner | CA | |
| Nurse Practitioner | CA |
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