MICHAEL SEAN SAMPSON (M.D.) – Internal Medicine Physician, NPI 1568466100
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,558 INTERNAL MEDICINE in CA
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Provider Addresses for MICHAEL SEAN SAMPSON (M.D.)
Beverly Boulevard, Whittier, Los Angeles County, California, 90601, United States
LOS ANGELES, CA 900043432
Phone: (323) 953-2956
Fax: (323) 913-2588
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 78 Open Payments records for all available years, with a total value of $1,633.
Total Amount is formed as General ($1,633) + Research ($0) + Ownership ($0) = $1,633.
Last reported payment date: 2024-12-20 • Largest payer in this snapshot: ViiV Healthcare Company ($675).
Total Amount
$1,633
General + Research + Ownership
Payments
78
Total payment records
General Amount
$1,633
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ViiV Healthcare Company | $675 |
| Gilead Sciences, Inc. | $611 |
| Novo Nordisk Inc | $114 |
| Janssen Biotech, Inc. | $70 |
| Boston Scientific Corporation | $48 |
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: 2010-09-27
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20100927001183 | I | Internal Medicine | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 93 | 29 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 78 | 28 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 57 | 28 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 55 | 24 | $0 |
| G0008 | Administration of influenza virus vaccine | 23 | 22 | $0 |
Insurance plans in this area (ZIP 90004)
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