IndividualActive
Diana Longdon, L.C.S.W.
NPI 1598861353 · Clinical Social Worker · Helena, MT
Diana Longdon, L.C.S.W. is a Clinical Social Worker provider in Helena, MT (NPI 1598861353).
Provider details
- NPI number
- 1598861353
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- L.C.S.W.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 121 (MT)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 index)
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
535 Saddle Dr
Helena, MT 59601-5634
Phone: (406) 449-3115
Fax: (406) 449-8828
Street-level locationGet directions
Mailing address
535 Saddle Dr
Helena, MT 59601-5634
Registry dates
- Enumerated
- 2006-09-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Diana Longdon's NPI number?
- Diana Longdon's National Provider Identifier (NPI) is 1598861353, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Longdon's specialty?
- Diana Longdon is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Diana Longdon located?
- Diana Longdon's practice location on file with NPPES is 535 Saddle Dr, Helena, MT 59601-5634.
- What is Diana Longdon's phone number?
- The practice phone number listed in the NPPES registry for Diana Longdon is (406) 449-3115.
- Is Diana Longdon's NPI active?
- Yes — Diana Longdon's NPI (1598861353) 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.