DR. JOHN MICHAEL MASTERSON (MD) – Urology Physician, NPI 1043773732
Urology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,307 UROLOGY in CA
Provider Addresses for DR. JOHN MICHAEL MASTERSON (MD)
8635 W 3RD ST STE 1070W
LOS ANGELES, CA 900486137
Phone: (310) 423-4700
Type: Mailing
12 READS WAY STE 2000
NEW CASTLE, DE 197201649
Phone: (302) 652-8990
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 21 Open Payments records for all available years, with a total value of $1,740.
Total Amount is formed as General ($1,740) + Research ($0) + Ownership ($0) = $1,740.
Last reported payment date: 2024-10-30 • Largest payer in this snapshot: Medtronic, Inc. ($490).
Total Amount
$1,740
General + Research + Ownership
Payments
21
Total payment records
General Amount
$1,740
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-30
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Medtronic, Inc. | $490 |
| COLOPLAST CORP | $410 |
| Boston Scientific Corporation | $341 |
| UROGEN PHARMA, INC. | $197 |
| Endo 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: 2025-07-16
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 |
|---|---|---|---|---|
| I20250716004410 | I | Urology | DE | 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 90048)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | FL | |
| U R O L O G Y | DE | |
| U R O L O G Y | DE | |
| U R O L O G Y | DE | |
| U R O L O G Y | DE | |
| U R O L O G Y | DE | |
| U R O L O G Y | MD | |
| Physician Assistant | DE | |
| Physician Assistant | DE | |
| Interventional Radiology | AL |
Reviews
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