DEREK NGUYEN (MD) – Internal Medicine Physician, NPI 1528054095
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,508 INTERNAL MEDICINE in CA
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Provider Addresses for DEREK NGUYEN (MD)
4100, Central Avenue, Magnolia Center, Riverside, Riverside County, California, 92506, United States
SUITE 106
RIVERSIDE, CA 92506
Phone: (951) 683-6830
Fax: (951) 784-6146
Type: Mailing
4435 BROCKTON AVE STE B
RIVERSIDE, CA 925014004
Phone: (951) 683-6830
Fax: (951) 228-9458
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 82 Open Payments records for all available years, with a total value of $1,563.
Total Amount is formed as General ($1,563) + Research ($0) + Ownership ($0) = $1,563.
Last reported payment date: 2024-12-11 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($374).
Total Amount
$1,563
General + Research + Ownership
Payments
82
Total payment records
General Amount
$1,563
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-11
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2005-01-24
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 |
|---|---|---|---|---|
| I20050124000257 | 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 |
|---|---|---|---|---|
| 99309 | Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 2,730 | 188 | $0 |
| 99310 | Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 1,195 | 220 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 858 | 201 | $0 |
| 99497 | Advance care planning, first 30 minutes | 450 | 337 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 368 | 163 | $0 |
Insurance plans in this area (ZIP 92506)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | CA |
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