Viet Nguyen, DO
NPI 1245406636 · Internal Medicine Physician · Falls Church, VA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Viet Nguyen, DO is a Internal Medicine Physician provider in Falls Church, VA (NPI 1245406636).
Provider details
- NPI number
- 1245406636
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 0102204088 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,433 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 601 | $125 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 187 | $139 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 162 | $122 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 162 | $18 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 93 | $54 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 165 | 60 |
| Amlodipine Besylate | 141 | 45 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 89 | 22 |
| Metformin Hcl | 85 | 33 |
| Pantoprazole Sodium | 80 | 35 |
| Famotidine | 62 | 24 |
| Celecoxib | 60 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$776 across 24 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 8219 Leesburg Pike Ste 201Vienna, VA 22182-2625Phone: (703) 532-1909Fax: (703) 532-5868
Registry dates
- Enumerated
- 2008-05-05
- Last updated
- 2025-11-06
- Certified
- 2025-11-06
Frequently asked questions
- What is Viet Nguyen's NPI number?
- Viet Nguyen's National Provider Identifier (NPI) is 1245406636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Viet Nguyen's specialty?
- Viet Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Viet Nguyen located?
- Viet Nguyen's practice location on file with NPPES is 3300 Gallows Rd, Falls Church, VA 22042-3300.
- What is Viet Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Viet Nguyen is (703) 776-4001.
- Does Viet Nguyen accept Medicare?
- Viet Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Viet Nguyen's NPI active?
- Yes — Viet Nguyen's NPI (1245406636) is active in the NPPES registry as of the last update on 2025-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.