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

Mr. Ian L. Greybull, FNP

Individual provider Nurse Practitioner · NPI 1801105531

Mr. Ian L. Greybull, FNP is a Nurse Practitioner in Bismarck, North Dakota. Qualified in 2010, 16 years ago. Practices with Shoshone-Paiute Tribes, a 9-clinician group and accepts Medicare assignment. Licensed in North Dakota.

Years since qualifying
16
Licensed in
ND
In the registry since
2010
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

300 W Century Ave
Bismarck, ND 58503 Not confirmed with CMS for 14 years — call before visiting
Phone: (701) 323-9900
Fax: (701) 323-9911
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence R29280 (ND)

Record details

NPI number1801105531
Entity typeIndividual (Type 1)
GenderMale
Credentials FNP
Sole proprietorYes
NPI enumeratedSeptember 29, 2010
Last updated in NPPESMarch 5, 2012

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Shoshone-Paiute Tribes — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients72
Services billed 285 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Shoshone-Paiute Tribes

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Bismarck