Quick answers
- Does Kiarash Mashayek accept Medicare assignment?
- Yes. Medicare's clinician data says Kiarash Mashayek accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Kiarash Mashayek see?
- In 2024, CMS data shows 26 Original Medicare patients and 69 services for Kiarash Mashayek. This counts Original Medicare only and measures volume, not quality.
- What is Kiarash Mashayek's NPI number?
- 1437513512. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Kiarash Mashayek, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 26 |
|---|---|
| Services billed to Medicare | 69 |
| Different services or procedures | 31 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)12 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure73%
- Arthritis54%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)50%
- Diabetes42%
- COPD42%
Hospitals where Kiarash Mashayek works
Medicare's Facility Affiliation Data lists Kiarash Mashayek at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Alomere HealthAlexandria, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240030
- Sanford Bemidji Medical CenterBemidji, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240100
- Sanford Medical Center BismarckBismarck, ND · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 350015
- Sanford Medical Center FargoFargo, ND · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 350011
- Trinity HospitalsMinot, ND · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 350006
Practice locations
Addresses where Kiarash Mashayek is enrolled with Medicare (CMS data updated October 2, 2026).
- 1220 Sheyenne StWest Fargo, ND 58078 (701) 234‑4445
- 21 Wiley Ave SLidgerwood, ND 58053 (701) 538‑4189
- 5225 23rd Ave SFargo, ND 58104 (701) 417‑2575
- 801 Broadway NFargo, ND 58102 (701) 234‑2000
Group practices
Medicare enrollment lists Kiarash Mashayek as a member of this group (CMS data updated October 2, 2026).
- Sanford Medical Center Fargo1,225 clinicians in the group
Specialties
- Surgical Oncologyprimary
Other surgical oncologists in North Dakota
Clinicians with the same Medicare primary specialty in North Dakota — not a recommendation.
Other clinicians in Sanford Medical Center Fargo
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1437513512 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians