DR. DIEM-QUYNH PHUONG NGUYEN MD
NPI 1689171019
Family Medicine in Fort Smith, AR
About Dr. Diem-quynh Phuong Nguyen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIEM-QUYNH PHUONG NGUYEN MD (NPI 1689171019) is an individual family medicine provider in Fort Smith, Arkansas, licensed in Arkansas (E-14544) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Diem-quynh Phuong Nguyen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
13Medicare enrollment records show Diem-quynh Nguyen reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fort Smith, AR 72901
- Reassigned Medicare billing, Arkansas enrollment
- 23 clinicians in this Medicare group
Fort Smith, AR 72901
- Reassigned Medicare billing, Arkansas enrollment
- 50 clinicians in this Medicare group
Fort Smith, AR 72901
- Reassigned Medicare billing, Arkansas enrollment
- 78 clinicians in this Medicare group
Fort Smith, AR 72903
- Reassigned Medicare billing, Arkansas enrollment
- 658 clinicians in this Medicare group
Fort Smith, AR 72916
- Reassigned Medicare billing, Arkansas enrollment
- 44 clinicians in this Medicare group
Van Buren, AR 72956
- Reassigned Medicare billing, Arkansas enrollment
- 61 clinicians in this Medicare group
Mansfield, AR 72944
- Reassigned Medicare billing, Arkansas enrollment
- Also billed through NPI 1912978875 (Arkansas)
- 137 clinicians in this Medicare group
Booneville, AR 72927
- Reassigned Medicare billing, Arkansas enrollment
- Also billed through NPI 1992133714 (Arkansas)
- 146 clinicians in this Medicare group
Ozark, AR 72949
- Reassigned Medicare billing, Arkansas enrollment
- Also billed through NPI 1275504128 (Arkansas)
- 147 clinicians in this Medicare group
Paris, AR 72855
- Reassigned Medicare billing, Arkansas enrollment
- Also billed through NPI 1760453633 (Arkansas)
- 159 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 15
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 72901 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Diem-quynh Nguyen's NPI number?
The NPI number for Diem-quynh Nguyen is 1689171019. It was assigned to this individual provider in the NPPES registry on April 11, 2018. The provider is also known as Dr. Diem Quynh Phuong Nguyen MD.
Where is Diem-quynh Nguyen located?
Diem-quynh Nguyen practices at 4620 Towson Ave, Fort Smith, AR 72901. The listed phone number is (479) 573-3082.
What is Diem-quynh Nguyen's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Diem-quynh Nguyen enrolled in Medicare?
Yes. Diem-quynh Nguyen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Diem-quynh Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diem-quynh Nguyen reassigns Medicare benefits to 13 organizations: University Of Arkansas For Medical Sciences (Fort Smith, AR), Arkansas Post Discharge Services, PLLC (Fort Smith, AR), Sebastian Physician Services, PLLC (Fort Smith, AR), Mercy Clinic Fort Smith Communities (Fort Smith, AR), Prime Physicians LLC (Fort Smith, AR) and 8 more organizations, listed in the Medicare section above. Each 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 Diem-quynh Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Diem-quynh Nguyen accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 4 other insurers list Diem-quynh 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 Diem-quynh Nguyen was last updated on August 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Dr. Diem-Quynh Phuong Nguyen, MD · NPI 1689171019
Family Medicine physician in Fort Smith, Arkansas. Individual provider, active in the CMS NPPES registry since April 11, 2018.
## Identity
- **NPI:** 1689171019 (Entity type: Individual)
- **Enumerated:** April 11, 2018
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** E-14544 (Arkansas)
- **Sole proprietor:** No
## Practice location
- **Address:** 4620 TOWSON AVE, Fort Smith, AR 72901-7961
- **Phone:** (479) 573-3082 · **Fax:** (479) 573-3100
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 13 organizations under Medicare reassignment (form CMS-855R): University Of Arkansas For Medical Sciences (NPI 1831193531, Fort Smith, AR); Arkansas Post Discharge Services, PLLC (NPI 1851152029, Fort Smith, AR); Sebastian Physician Services, PLLC (NPI 1255110110, Fort Smith, AR); Mercy Clinic Fort Smith Communities (NPI 1902073620, Fort Smith, AR); Prime Physicians LLC (NPI 1033454723, Fort Smith, AR); and 8 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** August 7, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1689171019) · Data from the CMS NPPES public registry.