William Cullis, MD
Family Medicine Physician · Ronan, MT
William Cullis, MD is a family medicine physician with a practice address in Ronan, Montana, and NPI 1174685374, issued on Dec 14, 2006. Check the license (Montana 8425, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Cullis
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 8425 MT
Self-reported in NPPES; status is on the state search - Practice location
- 126 6TH Ave SW, Ronan, MT 59864
- Phone
- (406) 676-3600
- Enumerated
- Dec 14, 2006
- Entity
- Type 1 · individual
Also registered at 126 6TH Ave SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Alfiero, PA-CPhysician Assistant1417029059
- Elizabeth Baxter, SWLCSocial Worker1528710233
- Joanna Billings, D.O.Family Medicine Physician1447630868
- Stacey Burdett, FNP-BCFamily Nurse Practitioner1073208757
- Krystal Diel, LCSWClinical Social Worker1053907287
- Michael Dolecki, M.D.Orthopaedic Surgery Physician1033186655
Verify William Cullis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 8425Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
95% fewer Medicare Part D claims than the average family medicine physician in 2024
185 Medicare Part D claims, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Januvia48 claims
- Potassium Chloride13 claims
- Quetiapine Fumarate13 claims
- Torsemide13 claims
- Isosorbide Mononitrate Er12 claims
- Rosuvastatin Calcium12 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.
17 family medicine physician records list a Ronan practice address
They are 17 of the 112 NPPES records with a Ronan practice address, and 766 family medicine physician records in Montana.
All 17 in Ronan → All 766 in Montana → Every provider in Ronan →
Other family medicine physician records in Montana
- Marc Adams, MDShelby, MT1265449482
- Dale Agner, M.D.Billings, MT1861486490
- Cynthia Alarcon, PA-CHelena, MT1386981686
- Brandon Allen, MDEnnis, MT1215499421
- Hans Amen, D.O.Malmstrom Afb, MT1538426507
- Beth Ammons, MDMissoula, MT1780623926
- Robert Amrine, MDMissoula, MT1366640484
- Bjorn Anderson, DOStevensville, MT1770146037
- Jonathan Anderson, MDKalispell, MT1356397533
- Leah Anderson, M.D.Bozeman, MT1851504195
Common questions
What is William Cullis, MD's NPI number?
William Cullis, MD's National Provider Identifier (NPI) is 1174685374, issued on Dec 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Cullis, MD located?
The NPPES record lists a practice address at 126 6TH Ave SW, Ronan, MT, 59864. Phone: (406) 676-3600. Providers update this record themselves, so call before visiting.
How can I verify William Cullis, MD's license?
NPPES lists Montana license number 8425, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Cullis, MD prescribe under Medicare Part D?
In 2024, William Cullis, MD had 185 Medicare Part D claims; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.