NPPES file of Aug 9, 2026

Ngoc Thanh Tu Nguyen, MD

Sleep Medicine (Internal Medicine) Physician · Kingsport, TN

Ngoc Thanh Tu Nguyen, MD is a sleep medicine (internal medicine) physician with a practice address in Kingsport, Tennessee, and NPI 1396307492, issued on Jun 28, 2019. Check the license (Tennessee 74419, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1396307492
Name
Ngoc Thanh Tu Nguyen
Credential
MD
Primary taxonomy
Sleep Medicine (Internal Medicine) Physician 207RS0012X
License number
74419 TN
Self-reported in NPPES; status is on the state search
Practice location
4 Sheridan SQ Ste 200, Kingsport, TN 37660
Phone
(423) 246-7931
Enumerated
Jun 28, 2019
Record last updated
Dec 12, 2025
Fax
(423) 246-1906
Medicare enrollment
Enrolled (PECOS I20251118004838); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest sleep medicine (internal medicine) physician records → All 27 in Tennessee → Look up another NPI →

Also registered at 4 Sheridan SQ Ste 200

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Christopher CookHospitalist Physician1306264668
  2. Joel Danisi, M.D.Internal Medicine Physician1972529683
  3. Mathew Finniss, M.D.Infectious Disease Physician1346773793
  4. Dan FrechtlingInternal Medicine Physician1609455567
  5. Angela Harless, FNPFamily Nurse Practitioner1962020750
  6. Taif Khattak, MDHospitalist Physician1679208078

Verify Ngoc Thanh Tu Nguyen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTennessee Board of Medical Examiners
    Search for license 74419    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Tennessee license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Medical Education Assistance CorporationKingsport, TN

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ngoc Thanh Tu Nguyen among 27 sleep medicine (internal medicine) physician records in Tennessee

Ngoc Thanh Tu Nguyen, MD is one of 27 sleep medicine (internal medicine) physician records with a practice address in Tennessee. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 81% of them.

  • NPI issued2019 · 81% of these records are older, 15% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated2015 · median 1999 among the 19 with a school on file
  • Record last updated2025 · 41% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RS0012X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Sleep Medicine (Internal Medicine) Physician providers in Tennessee

There are 27 sleep medicine (internal medicine) physician records in Tennessee.

All 27 in Tennessee → Every provider in Kingsport → Sleep Medicine (Internal Medicine) Physician nationwide →

The 8 sleep medicine (internal medicine) physician records with the nearest ZIP codes

  1. Melissa Khalil, MDJohnson City, TN 376041346877289
  2. Cherridan Rambally, M.D.Oak Ridge, TN 378301619015575
  3. Prashant James, M.D.Knoxville, TN 379091609250562
  4. Matthew Mascioli, DOKnoxville, TN 379091225615933
  5. Bert Hampton, M.D.Knoxville, TN 379161932245743
  6. Kevin Martinolich, MDKnoxville, TN 379201659388197
  7. Gary Lovelady, M.D.Tullahoma, TN 373881619057528
  8. Laura Donahue, MDNashville, TN 372321538795521

Common questions

What is Ngoc Thanh Tu Nguyen, MD's NPI number?

Ngoc Thanh Tu Nguyen, MD's National Provider Identifier (NPI) is 1396307492, issued on Jun 28, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Ngoc Thanh Tu Nguyen, MD located?

The NPPES record lists a practice address at 4 Sheridan SQ Ste 200, Kingsport, TN, 37660. Phone: (423) 246-7931. Providers update this record themselves, so call before visiting.

How can I verify Ngoc Thanh Tu Nguyen, MD's license?

NPPES lists Tennessee license number 74419, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.