Mark J. Vellek, M.D.
Hematology & Oncology Physician · Las Vegas, NV
Mark J. Vellek, M.D. is a hematology & oncology physician with a practice address in Las Vegas, Nevada, and NPI 1063409688, issued on Sep 29, 2005. Check the license (Nevada 20944, as entered in NPPES) on the Nevada State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mark J. Vellek
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 20944 NV
C2194 KY
R5H89 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3131 LA Canada St Ste 140, Las Vegas, NV 89169
- Phone
- (702) 933-9400
- Enumerated
- Sep 29, 2005
- Record last updated
- Dec 12, 2023
- Fax
- (702) 933-9444
- Medicaid IDs
- 203284625 MO
1063409688 NV - Medicare enrollment
- Enrolled (PECOS I20240129000105); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1986
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 88 in Nevada → Look up another NPI →
Also registered at 3131 LA Canada St Ste 140
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pradipta Chaudhuri, MDCardiovascular Disease Physician1457447849
- Nana Esi Kittah, MDEndocrinology, Diabetes & Metabolism Physician1922231745
- Carrie Lofton, RN, APN, ACNP-BCAcute Care Nurse Practitioner1740560614
- Valerie Martinez-VargasEndocrinology, Diabetes & Metabolism Physician1801397641
- Lisa MatthewsMedical Physician Assistant1720203581
- Wardon Ojedapo, PA-CMedical Physician Assistant1164001392
Verify Mark J. Vellek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNevada State Board of Medical Examiners
Search for license 20944Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average hematology & oncology physician in 2024
981 Medicare Part D claims for 220 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 86 claims were for opioids.
Most prescribed
- Anastrozole91 claims
- Prochlorperazine Maleate86 claims
- Dexamethasone67 claims
- Prednisone62 claims
- Ondansetron Hcl52 claims
- Lenalidomide49 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: $1,114.70
61 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Murray-Calloway County Public Hospital CorporationMurray, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark J. Vellek among 88 hematology & oncology physician records in Nevada
Mark J. Vellek, M.D. is one of 88 hematology & oncology physician records with a practice address in Nevada. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1986 · median 1995 among the 64 with a school on file
- Record last updated2023 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Nevada practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Nevada
There are 88 hematology & oncology physician records in Nevada.
All 88 in Nevada → Every provider in Las Vegas → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Dhan Kaushal, MDLas Vegas, NV 891691730186354
- Holavanahall Keshava-Prasad, MDLas Vegas, NV 891691437100773
- Edwin Kingsley, MDLas Vegas, NV 891691336156199
- Shahid Malik, MDLas Vegas, NV 891691588635312
- Aditya Shetty, MDLas Vegas, NV 891691760738363
- Janson Trieu, MDLas Vegas, NV 891691982108817
- Nicholas Vogelzang, MDLas Vegas, NV 891691558361154
- John Ellerton, MD, CMLas Vegas, NV 891831962585745
Common questions
What is Mark J. Vellek, M.D.'s NPI number?
Mark J. Vellek, M.D.'s National Provider Identifier (NPI) is 1063409688, issued on Sep 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark J. Vellek, M.D. located?
The NPPES record lists a practice address at 3131 LA Canada St Ste 140, Las Vegas, NV, 89169. Phone: (702) 933-9400. Providers update this record themselves, so call before visiting.
How can I verify Mark J. Vellek, M.D.'s license?
NPPES lists Nevada license number 20944, 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 J. Vellek, M.D. prescribe under Medicare Part D?
In 2024, Mark J. Vellek, M.D. had 981 Medicare Part D claims for 220 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.