DR. KIARASH CASEY MASHAYEK M.D,M.S
NPI 1437513512
Surgery - Surgical Oncology in Fargo, ND
About Dr. Kiarash Casey Mashayek M.d,m.s NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KIARASH CASEY MASHAYEK M.D,M.S (NPI 1437513512) is an individual surgical oncology provider in Fargo, North Dakota, licensed in North Dakota (21603) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, is affiliated with Alomere Health, and maintains 4 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Kiarash Casey Mashayek M.d,m.s is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show Kiarash Mashayek reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fargo, ND 58102
- Reassigned Medicare billing, North Dakota enrollment
- 1,464 clinicians in this Medicare group
Denton, TX 76201
- Reassigned Medicare billing, Texas enrollment
- 5,299 clinicians in this Medicare group
Abilene, TX 79601
- Reassigned Medicare billing, Texas enrollment
- 420 clinicians in this Medicare group
Corpus Christi, TX 78404
- Reassigned Medicare billing, Texas enrollment
- 130 clinicians in this Medicare group
Sacramento, CA 95816
- Reassigned Medicare billing, California enrollment
- 266 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 180 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Alomere Health
Acute Care Hospitals · Alexandria, MNSanford Bemidji Medical Center
Acute Care Hospitals · Bemidji, MNTrinity Hospitals
Acute Care Hospitals · Minot, NDSanford Medical Center Fargo
Acute Care Hospitals · Fargo, NDSanford Medical Center Bismarck
Acute Care Hospitals · Bismarck, NDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 58122 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Kiarash Mashayek's NPI number?
The NPI number for Kiarash Mashayek is 1437513512. It was assigned to this individual provider in the NPPES registry on April 5, 2016.
Where is Kiarash Mashayek located?
Kiarash Mashayek practices at 737 Broadway Desk 36, Rt 1151, Fargo, ND 58122. The listed phone number is (701) 234-2251.
What is Kiarash Mashayek's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.
Is Kiarash Mashayek enrolled in Medicare?
Yes. Kiarash Mashayek is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Kiarash Mashayek's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kiarash Mashayek reassigns Medicare benefits to 6 organizations: Sanford Medical Center Fargo (Fargo, ND), University Of Texas Southwestern Medical Center At Dallas (Denton, TX), Hendrick Provider Network (Abilene, TX), Acute Care Surgical Affiliates Of Texas PA (Corpus Christi, TX), Acute Care Surgery Medical Group, Inc. (Sacramento, CA) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Kiarash Mashayek's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kiarash Mashayek accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross Blue Shield of North Dakota, Blue Cross and Blue Shield of Texas and Security Health Plan list Kiarash Mashayek as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Kiarash Mashayek affiliated with any hospitals?
According to CMS data, Kiarash Mashayek is affiliated with Alomere Health, Sanford Bemidji Medical Center, Trinity Hospitals, Sanford Medical Center Fargo and Sanford Medical Center Bismarck.
When was this NPI record last updated?
The NPPES record for Kiarash Mashayek was last updated on May 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Kiarash Casey Mashayek, M.D,M.S · NPI 1437513512
Surgical Oncology physician in Fargo, North Dakota. Individual provider, active in the CMS NPPES registry since April 5, 2016.
## Identity
- **NPI:** 1437513512 (Entity type: Individual)
- **Enumerated:** April 5, 2016
- **Primary specialty:** Surgery - Surgical Oncology · taxonomy 2086X0206X
- **State license:** 21603 (North Dakota)
- **Sole proprietor:** No
## Practice location
- **Address:** 737 BROADWAY DESK 36, RT 1151, Fargo, ND 58122-0001
- **Phone:** (701) 234-2251
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Sanford Medical Center Fargo (NPI 1952323974, Fargo, ND); University Of Texas Southwestern Medical Center At Dallas (NPI 1770894396, Denton, TX); Hendrick Provider Network (NPI 1396961322, Abilene, TX); Acute Care Surgical Affiliates Of Texas PA (NPI 1407322415, Corpus Christi, TX); Acute Care Surgery Medical Group, Inc. (NPI 1700069549, Sacramento, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** May 22, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1437513512) · Data from the CMS NPPES public registry.