John J. Cassani, DO
Family Medicine Physician · Helena, MT
John J. Cassani, DO is a family medicine physician with a practice address in Helena, Montana, and NPI 1003894320, issued on Jan 6, 2006. Check the license on the Montana Board of Medical Examiners; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John J. Cassani
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- OS13496 FL
A-1686-12 NM
345 NV
Self-reported in NPPES; status is on the state search - Practice location
- 2550 E Broadway St, Helena, MT 59601
- Phone
- (406) 457-4180
- Enumerated
- Jan 6, 2006
- Record last updated
- Mar 12, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 775 in Montana → Look up another NPI →
Also registered at 2550 E Broadway St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Bailey, M.D.Family Medicine Physician1083717888
- Britt Ballinger, NPNurse Practitioner1265752679
- Rebecca Barringer, PAPhysician Assistant1659060150
- Mikael Bedell, M.D.Family Medicine Physician1871665752
- James Bennett, M.D.Rheumatology Physician1588920896
- Reece Brandon, PT, DPT, MPHPhysical Therapist1689472250
Verify John J. Cassani in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John J. Cassani among 775 family medicine physician records in Montana
John J. Cassani, DO is one of 775 family medicine physician records with a practice address in Montana. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 50% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2018 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
48 family medicine physician records list a practice address in Helena
They are 48 of the 1,591 NPPES records with a practice address in Helena, and 775 family medicine physician records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 775 in Montana → Every provider in Helena → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jessica Bailey, M.D.Helena, MT 596011083717888
- Trena Bonde, M.D.Helena, MT 596011750373049
- Jenifer Dodge, MDHelena, MT 596011295724292
- Diane Eodice, D.O.Helena, MT 596011023098696
- Paul Eodice, D.O.Helena, MT 596011659351211
- Andrew Gilbert, MDHelena, MT 596011043269897
- Christopher Holdhusen, M.D.Helena, MT 596011033177134
- Sheri Howell, MDHelena, MT 596011104927722
Common questions
What is John J. Cassani, DO's NPI number?
John J. Cassani, DO's National Provider Identifier (NPI) is 1003894320, issued on Jan 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John J. Cassani, DO located?
The NPPES record lists a practice address at 2550 E Broadway St, Helena, MT, 59601. Phone: (406) 457-4180. Providers update this record themselves, so call before visiting.
How can I verify John J. Cassani, DO's license?
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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.