DENNIS TRI NGUYEN (MD) – Hospitalist Physician, NPI 1811121213
Hospitalist Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
540 GASTROENTEROLOGY in VA
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Provider Addresses for DENNIS TRI NGUYEN (MD)
5510, Alma Lane, Springfield, Fairfax, Virginia, 22151, United States
SPRINGFIELD, VA 221514027
Phone: (703) 642-5990
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 129 Open Payments records for all available years, with a total value of $2,531.
Total Amount is formed as General ($2,531) + Research ($0) + Ownership ($0) = $2,531.
Last reported payment date: 2024-12-23 • Largest payer in this snapshot: ABBVIE INC. ($723).
Total Amount
$2,531
General + Research + Ownership
Payments
129
Total payment records
General Amount
$2,531
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $723 |
| Gilead Sciences, Inc. | $520 |
| Janssen Biotech, Inc. | $186 |
| Phathom Pharmaceuticals, Inc. | $169 |
| AIMMUNE THERAPEUTICS, INC. | $99 |
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: 2012-07-31
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 |
|---|---|---|---|---|
| I20120731000696 | I | Gastroenterology | DC | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 215 | 166 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 132 | 132 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 93 | 92 | $0 |
| 45378 | Diagnostic exam of large bowel using a flexible endoscope | 88 | 88 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 84 | 83 | $0 |
Insurance plans in this area (ZIP 22151)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | VA | 45378 | Diagnostic examination of large bowel using an endoscope | 13 | 13 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | VA | |
| G A S T R O E N T E R O L O G Y | VA | |
| Physician Assistant | VA | |
| - | DC | |
| Internal Medicine | VA | |
| Physician Assistant | VA | |
| - | VA | |
| Physician Assistant | VA | |
| Internal Medicine | VA | |
| Physician Assistant | VA |
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