Diana Claassen, MD
NPI 1831288943 · Anatomic Pathology & Clinical Pathology Physician · Helena, MT
Diana Claassen, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Helena, MT (NPI 1831288943).
Provider details
- NPI number
- 1831288943
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 8456 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Diana Claassen's NPI number?
- Diana Claassen's National Provider Identifier (NPI) is 1831288943, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Claassen's specialty?
- Diana Claassen is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Claassen located?
- Diana Claassen's practice location on file with NPPES is 2480 E Broadway St, Helena, MT 59601-4988.
- What is Diana Claassen's phone number?
- The practice phone number listed in the NPPES registry for Diana Claassen is (406) 447-7553.
- Is Diana Claassen's NPI active?
- Yes — Diana Claassen's NPI (1831288943) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.