Diana Claassen, MD
Anatomic Pathology & Clinical Pathology Physician · Helena, MT
Diana Claassen, MD is an anatomic pathology & clinical pathology physician with a practice address in Helena, Montana, and NPI 1831288943, issued on Oct 12, 2006. Check the license (Montana 8456, as entered in NPPES) on the Montana Board of Medical Examiners; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Diana Claassen
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- 8456 MT
Self-reported in NPPES; status is on the state search - Practice location
- 2480 E Broadway St, Helena, MT 59601
- Phone
- (406) 447-7553
- Enumerated
- Oct 12, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Verify Diana Claassen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 8456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Anatomic Pathology & Clinical Pathology Physician providers in Montana
There are 45 anatomic pathology & clinical pathology physician records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other anatomic pathology & clinical pathology physician records in Montana
- Robert Bates, M.D.Crow Agency, MT1780678326
- Thomas Bennett, M.D.Billings, MT1598769820
- Scott Bibbey, M.D.Billings, MT1740658020
- Benjamin Blend, M.D.Bozeman, MT1588657456
- Marie Boyd, M.D.Missoula, MT1114979739
- Maria Braman, MDHelena, MT1508875550
- Ryan BraunbergerBillings, MT1457812448
- Michael Brown, M.D.Billings, MT1639171713
- Richard Carson, MDGreat Falls, MT1255310017
- Fernando Castro-Silva, M.D.Kalispell, MT1811193857
Common questions
What is Diana Claassen, MD's NPI number?
Diana Claassen, MD's National Provider Identifier (NPI) is 1831288943, issued on Oct 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Diana Claassen, MD located?
The NPPES record lists a practice address at 2480 E Broadway St, Helena, MT, 59601. Phone: (406) 447-7553. Providers update this record themselves, so call before visiting.
How can I verify Diana Claassen, MD's license?
NPPES lists Montana license number 8456, 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.
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.