Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark Christopher Sievert, MD

Individual provider Nephrology Physician · NPI 1720321912

Mark Christopher Sievert, MD practises Nephrology in Reno, Nevada. Graduated from University of Nevada School of Medicine in 2013, 13 years ago. Practices with Oneill Clark Narvarte and Vicks a Professional Corporation, a 24-clinician group, works from 7 locations, accepts Medicare assignment and offers telehealth. Licensed in Nevada.

Years since qualifying
13
Trained at
University of Nevada School of Medicine
Licensed in
NV
In the registry since
2013
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5437 Kietzke Ln
Reno, NV 89511-1088
Phone: (775) 322-4550
Fax: (775) 322-4956
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (6)

  • 2340 S Carson St Ste A, Carson City, NV 89701-4540 — (775) 322-4550
  • 1995 Errecart Blvd Ste 205, Elko, NV 89801-8337 — (775) 322-4550
  • 6 Steptoe Cir, Ely, NV 89301-2692 — (775) 322-4550
  • 801 E Williams Ave, Fallon, NV 89406-3052 — (775) 322-4550
  • 932 Ryland St, Reno, NV 89502-1773 — (775) 322-4550
  • 5961 S Los Altos Pkwy Ste 107, Sparks, NV 89436-2501 — (775) 322-4550

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 17754 (NV)

Record details

NPI number1720321912
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 5, 2013
Last updated in NPPESSeptember 12, 2026
Certification dateSeptember 12, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Medical schoolUNIVERSITY OF NEVADA SCHOOL OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Oneill Clark Narvarte And Vicks A Professional Corporation — 24 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients897
Services billed 2,205 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $107 5 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Oneill Clark Narvarte and Vicks a Professional Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 24 clinicians in the practice; 12 are shown here.

Other providers in Reno