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LILY HOAI-AN NGUYEN MD
NPI 1376292698
Internal Medicine in Sterling, VA

Active since March 23, 2022PECOS Enrolled
46440 BENEDICT DR STE 208, STERLING, VA 20164(571) 665-6526 Get Directions Write a Review

NPPES record last updated: June 24, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Lily Hoai-an Nguyen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LILY HOAI-AN NGUYEN MD (NPI 1376292698) is an individual internal medicine provider in Sterling, Virginia, licensed in Virginia (0101286598) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS and is a graduate of Eastern Virginia Medical School (2022).

NPPES Registry Identity

NPI1376292698
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameLILY HOAI-AN NGUYENCredential: MD
Location Address46440 BENEDICT DR STE 208Sterling, VA 20164-6602
Mailing Address46440 Benedict Dr Ste 208Sterling, VA 20164-6602 · (571) 665-6526
Phone(571) 665-6526
Sole ProprietorNo
Medical School CMSEastern Virginia Medical SchoolGraduated 2022
Enumeration DateMarch 23, 2022
Last NPPES UpdateJune 24, 2025
NPPES CertifiedJune 24, 2025
✔ NPI 1376292698 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in VA · 0101286598
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
46440 BENEDICT DR STE 208, Sterling, VA 20164
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Lily Hoai-an Nguyen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3375925688
PECOS Enrollment IDI20251007001146
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Lily Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Inova Health Care Services
13 mi
Multi-Specialty
2740 PROSPERITY AVE STE 200
Fairfax, VA 22031
  • Reassigned Medicare billing, District of Columbia enrollment
  • 2,618 clinicians in this Medicare group
NPI 1669511051 (703) 321-2600

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20164 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$99.13 typical visit price
range $18.07 – $138.91
Typical copayment $24.78 (range $4.51 – $34.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALLISON T HUBBARD FNP
Nurse Practitioner (Family)
46440 BENEDICT DR STE 208
STERLING, VA 20164
Loudoun County (571) 434-0022
DR. ERICK DANIEL TEMOKA M.D.
Pediatrics
46440 BENEDICT DR STE 208
STERLING, VA 20164
Loudoun County (571) 665-6500
KIRSTEN L PIERSON
Nurse Practitioner (Gerontology)
46440 BENEDICT DR STE 208
STERLING, VA 20164
Loudoun County (571) 665-6526

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lily Nguyen's NPI number?

The NPI number for Lily Nguyen is 1376292698. It was assigned to this individual provider in the NPPES registry on March 23, 2022.

Where is Lily Nguyen located?

Lily Nguyen practices at 46440 Benedict Dr Ste 208, Sterling, VA 20164. The listed phone number is (571) 665-6526.

What is Lily Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Lily Nguyen enrolled in Medicare?

Yes. Lily Nguyen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Lily Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lily Nguyen reassigns Medicare benefits to Inova Health Care Services (Fairfax, VA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lily Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Lily Nguyen accept?

Health plans from Oscar Health list Lily Nguyen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Lily Nguyen was last updated on June 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.