Ian L. Greybull, FNP
Nurse Practitioner · Bismarck, ND
Ian L. Greybull, FNP is a nurse practitioner with a practice address in Bismarck, North Dakota, and NPI 1801105531, issued on Sep 29, 2010. Check the license (North Dakota R29280, as entered in NPPES) with the North Dakota board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ian L. Greybull
- Credential
- FNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- R29280 ND
Self-reported in NPPES; status is on the state search - Practice location
- 300 West Century Ave, Bismarck, ND 58503
- Phone
- (701) 323-9900
- Enumerated
- Sep 29, 2010
- Record last updated
- Mar 5, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (701) 323-9911
- Medicaid ID
- 000084031 ND
- Medicare enrollment
- Enrolled (PECOS I20150827002734); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 463 in North Dakota → Look up another NPI →
Verify Ian L. Greybull in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich North Dakota board licenses this profession
Search for license R29280Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average nurse practitioner in 2024
871 Medicare Part D claims for 72 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims. 20 claims were for opioids.
Most prescribed
- Lisinopril56 claims
- Amlodipine Besylate43 claims
- Ibuprofen31 claims
- Easy Touch Alcohol Prep Pads29 claims
- Losartan Potassium28 claims
- Jardiance27 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.
Bills Medicare through one group practice
- Shoshone-Paiute TribesOwyhee, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian L. Greybull among 463 nurse practitioner records in North Dakota
Ian L. Greybull, FNP is one of 463 nurse practitioner records with a practice address in North Dakota. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 35% of them.
- NPI issued2010 · 35% of these records are older, 63% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2010 · median 2018 among the 296 with a school on file
- Record last updated2012 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a North Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
106 nurse practitioner records list a practice address in Bismarck
They are 106 of the 3,669 NPPES records with a practice address in Bismarck, and 463 nurse practitioner records in North Dakota.
All 463 in North Dakota → Every provider in Bismarck → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Hannah BaileyBismarck, ND 585031922678374
- Kylie Buchholz, DNPBismarck, ND 585031215505235
- Kevin Chaussee, FNPBismarck, ND 585031962424440
- Kayla Cofer, NURSE PRACTITIONERBismarck, ND 585031023649860
- Laura Fuerstenberg, FNP-CBismarck, ND 585031619912326
- Katie Horner, NPBismarck, ND 585031609277144
- Susan Lardy, FNP-CBismarck, ND 585031962683276
- Amanda Levey, FNPBismarck, ND 585031316488083
Common questions
What is Ian L. Greybull, FNP's NPI number?
Ian L. Greybull, FNP's National Provider Identifier (NPI) is 1801105531, issued on Sep 29, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Ian L. Greybull, FNP located?
The NPPES record lists a practice address at 300 West Century Ave, Bismarck, ND, 58503. Phone: (701) 323-9900. Providers update this record themselves, so call before visiting.
How can I verify Ian L. Greybull, FNP's license?
NPPES lists North Dakota license number R29280, as entered by the provider. Search the North Dakota board that licenses this profession; the NPPES record confirms identity only.
How much does Ian L. Greybull, FNP prescribe under Medicare Part D?
In 2024, Ian L. Greybull, FNP had 871 Medicare Part D claims for 72 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.