STEPHEN H NGUYEN (MD) – Internal Medicine Physician, NPI 1619976644
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
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Provider Addresses for STEPHEN H NGUYEN (MD)
Haun Road, Sun City, Menifee, Riverside County, California, 92584, United States
SUN CITY, CA 925866542
Phone: (951) 672-4900
Fax: (951) 301-0025
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 58 Open Payments records for all available years, with a total value of $1,349.
Total Amount is formed as General ($1,349) + Research ($0) + Ownership ($0) = $1,349.
Last reported payment date: 2024-12-24 • Largest payer in this snapshot: Boehringer Ingelheim Pharmaceuticals, Inc. ($264).
Total Amount
$1,349
General + Research + Ownership
Payments
58
Total payment records
General Amount
$1,349
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-24
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: 2006-02-27
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 |
|---|---|---|---|---|
| I20060227000778 | 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 |
|---|---|---|---|---|
| 99442 | Telephone medical discussion with physician, 11-20 minutes | 1,113 | 424 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 1,112 | 573 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 575 | 308 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 570 | 348 | $0 |
| 80061 | Blood test, lipids (cholesterol and triglycerides) | 387 | 310 | $0 |
Insurance plans in this area (ZIP 92586)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | CA | 81002 | Urinalysis, manual test | 14 | 12 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CA | |
| E N D O C R I N O L O G Y | CA | |
| Internal Medicine | CA | |
| Internal Medicine | CA | |
| Family Practice | CA | |
| - | CA |
Reviews
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