Ian Greybull, FNP
NPI 1801105531 · Nurse Practitioner · Bismarck, ND
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ian Greybull, FNP is a Nurse Practitioner provider in Bismarck, ND (NPI 1801105531).
Provider details
- NPI number
- 1801105531
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- Yes
- License
- R29280 (ND)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
220 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 68 | $107 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 59 | $76 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 22 | $100 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 20 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 20 | $10 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 17 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 56 | 25 |
| Amlodipine Besylate | 43 | 11 |
| Ibuprofen | 31 | 13 |
| Alcohol Antiseptic Padsbrand: Easy Touch Alcohol Prep Pads | 29 | 17 |
| Losartan Potassium | 28 | 11 |
| Empagliflozinbrand: Jardiance | 27 | — |
| Atorvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-09-29
- Last updated
- 2012-03-05
Frequently asked questions
- What is Ian Greybull's NPI number?
- Ian Greybull's National Provider Identifier (NPI) is 1801105531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ian Greybull's specialty?
- Ian Greybull is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ian Greybull located?
- Ian Greybull's practice location on file with NPPES is 300 West Century Ave, Bismarck, ND 58503.
- What is Ian Greybull's phone number?
- The practice phone number listed in the NPPES registry for Ian Greybull is (701) 323-9900.
- Does Ian Greybull accept Medicare?
- Ian Greybull is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ian Greybull's NPI active?
- Yes — Ian Greybull's NPI (1801105531) is active in the NPPES registry as of the last update on 2012-03-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.