What is To-Vi Nguyen's NPI number?

To-Vi Nguyen's National Provider Identifier (NPI) is 1891484341, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is To-Vi Nguyen's specialty?

To-Vi Nguyen is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).

Where is To-Vi Nguyen located?

To-Vi Nguyen's practice location on file with NPPES is 14995 Shady Grove Rd Ste 350, Rockville, MD 20850-8726.

What is To-Vi Nguyen's phone number?

The practice phone number listed in the NPPES registry for To-Vi Nguyen is (301) 251-1433.

Does To-Vi Nguyen accept Medicare?

To-Vi Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is To-Vi Nguyen's NPI active?

Yes — To-Vi Nguyen's NPI (1891484341) is active in the NPPES registry as of the last update on 2023-05-30.

IndividualActiveAccepts Medicare

To-Vi Nguyen, PA-C

NPI 1891484341 · Physician Assistant · Rockville, MD

Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)

To-Vi Nguyen, PA-C is a Physician Assistant provider in Rockville, MD (NPI 1891484341).

Provider details

NPI number: 1891484341
Entity type: Individual
Primary specialty: Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Credential: PA-C
Sex: Female
Sole proprietor: No
License: C0008859 (MD)

Specialties & taxonomies

Physician AssistantPrimary363A00000XLicense C0008859 (MD)
Physician Assistants & Advanced Practice Nursing Providers

Profile Score

Established profile(55/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
3 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
280 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)
Aspiration And/Or Injection of Fluid From Large Joint20610	98	$72
Replacement of Knee Joint, Both Sides of Knee27447	63	$192
Replacement of Thigh Bone and Hip Joint With Prosthesis27130	29	$193
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	27	$120
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	23	$83
X-Ray of Knee, 3 Views

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Oxycodone Hcl	78	70
Tramadol Hcl	30	27
Celecoxib	18	16
Diclofenac Sodium	16	—
Meloxicam	16	—
Ondansetronbrand: Ondansetron Odt	13	13
Amoxicillin	12	12

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$52 across 2 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

14995 Shady Grove Rd Ste 350

Rockville, MD 20850-8726

Phone: (301) 251-1433

Fax: (301) 424-5266

Street-level locationGet directions

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Mailing address