NPPES file of Aug 9, 2026

Mark Tan, MD

Family Medicine Physician · Las Vegas, NV

Mark Tan, MD is a family medicine physician with a practice address in Las Vegas, Nevada, and NPI 1639755150, issued on Mar 23, 2021. Check the license (Nevada 24541, as entered in NPPES) on the Nevada State Board of Medical Examiners; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1639755150
Name
Mark Tan
Credential
MD
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
24541 NV
Self-reported in NPPES; status is on the state search
Practice location
8420 S Eastern Ave Ste 101, Las Vegas, NV 89123
Phone
(702) 483-3554
Enumerated
Mar 23, 2021
Record last updated
Oct 23, 2024
Fax
(725) 267-1020
Medicare enrollment
Enrolled (PECOS I20231108003964); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
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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Also registered at 8420 S Eastern Ave Ste 101

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

  1. Chad Bullock, FNP-CNurse Practitioner1447642517
  2. Nasim Daoud, MDRheumatology Physician1518117795
  3. Tudor Jianu, M.D.Rheumatology Physician1821039546
  4. Prabhjot Kaur, APRNFamily Nurse Practitioner1902495641
  5. Rini Mathews, MSN, APRN, FNP-CFamily Nurse Practitioner1972113363
  6. Aishwarya Vyas-Lahar, MDInternal Medicine Physician1770005662

Verify Mark Tan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNevada State Board of Medical Examiners
    Search for license 24541
    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 Nevada 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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91% fewer Medicare Part D claims than the average family medicine physician in 2024

315 Medicare Part D claims for 105 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.

  1. Mark Tan315
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium15 claims
  2. Lisinopril15 claims
  3. Losartan Potassium15 claims
  4. Cyclobenzaprine Hcl11 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $520.04

16 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mark Tan$520.04
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Medinix Medical Services Singh PLLCLas Vegas, NV

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

Mark Tan among 1,243 family medicine physician records in Nevada

Mark Tan, MD is one of 1,243 family medicine physician records with a practice address in Nevada. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 90% of them.

  • NPI issued2021 · 90% of these records are older, 7% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 58% of these records are
  • Graduated2020 · median 2008 among the 726 with a school on file
  • Record last updated2024 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Nevada practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

578 family medicine physician records list a practice address in Las Vegas

They are 578 of the 65,269 NPPES records with a practice address in Las Vegas, and 1,243 family medicine physician records in Nevada.

The 8 family medicine physician records with the nearest ZIP codes

  1. James Anthony, D.O., J.D.Las Vegas, NV 891231639216922
  2. Alma May Dewey, M.D.Las Vegas, NV 891231447397625
  3. Susan Echt, M.D.Las Vegas, NV 891231235441205
  4. Beth Goldman, M.D.Las Vegas, NV 891231932225695
  5. Heather Harris, FNPLas Vegas, NV 891231528223906
  6. Belle HuynhLas Vegas, NV 891231851041156
  7. Naysha Isom, M.D.Las Vegas, NV 891231275701617
  8. Harsahiba Kaur, MDLas Vegas, NV 891231144724766

Common questions

What is Mark Tan, MD's NPI number?

Mark Tan, MD's National Provider Identifier (NPI) is 1639755150, issued on Mar 23, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Mark Tan, MD located?

The NPPES record lists a practice address at 8420 S Eastern Ave Ste 101, Las Vegas, NV, 89123. Phone: (702) 483-3554. Providers update this record themselves, so call before visiting.

How can I verify Mark Tan, MD's license?

NPPES lists Nevada license number 24541, as entered by the provider. Search the Nevada State Board of Medical Examiners at https://medboard.nv.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Mark Tan, MD prescribe under Medicare Part D?

In 2024, Mark Tan, MD had 315 Medicare Part D claims for 105 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.

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.

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.