Kiarash Casey Mashayek, M.D,M.S
Surgical Oncology Physician · Fargo, ND
Kiarash Casey Mashayek, M.D,M.S is a surgical oncology physician with a practice address in Fargo, North Dakota, and NPI 1437513512, issued on Apr 5, 2016. Check the license (North Dakota 21603, as entered in NPPES) on the North Dakota Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Kiarash Casey Mashayek
- Credential
- M.D,M.S
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License numbers
- 21603 ND
T1770 TX
Self-reported in NPPES; status is on the state search - Practice location
- 737 Broadway Desk 36, RT 1151, Fargo, ND 58122
- Phone
- (701) 234-2251
- Enumerated
- Apr 5, 2016
- Record last updated
- May 22, 2026
- Medicare enrollment
- Enrolled (PECOS I20240930001108); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Verify Kiarash Casey Mashayek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Dakota Board of Medicine
Search for license 21603Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average surgical oncology physician in 2024
49 Medicare Part D claims for 29 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Oxycodone Hcl12 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: $134.16
2 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 1,132 providers of this specialty with any payment received $4,224.74 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.
One hospital affiliation
- Sanford Medical Center FargoWest Fargo, ND · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Surgical Oncology Physician providers in North Dakota
There are 6 surgical oncology physician records in North Dakota.
Other surgical oncology physician records in North Dakota
- Mohammad Ali, MDFargo, ND1194245910
- Sabha Ganai, MD, PHD, MPH, FACSFargo, ND1821144635
- Mark Jensen, M.D.Fargo, ND1659321073
- Colette Pameijer, M.D.Fargo, ND1770502122
- Robert Sticca, MDGrand Forks, ND1568526119
Common questions
What is Kiarash Casey Mashayek, M.D,M.S's NPI number?
Kiarash Casey Mashayek, M.D,M.S's National Provider Identifier (NPI) is 1437513512, issued on Apr 5, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Kiarash Casey Mashayek, M.D,M.S located?
The NPPES record lists a practice address at 737 Broadway Desk 36, RT 1151, Fargo, ND, 58122. Phone: (701) 234-2251. Providers update this record themselves, so call before visiting.
How can I verify Kiarash Casey Mashayek, M.D,M.S's license?
NPPES lists North Dakota license number 21603, as entered by the provider. Search the North Dakota Board of Medicine at https://www.ndbom.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kiarash Casey Mashayek, M.D,M.S prescribe under Medicare Part D?
In 2024, Kiarash Casey Mashayek, M.D,M.S had 49 Medicare Part D claims for 29 beneficiaries; the average among surgical oncology physician prescribers was 87. 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.