Diana Johnstone, LCSW
NPI 1740454057 · Clinical Social Worker · Milwaukee, WI
Diana Johnstone, LCSW is a Clinical Social Worker provider in Milwaukee, WI (NPI 1740454057).
Provider details
- NPI number
- 1740454057
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 7326123 (WI)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2008-04-17
- Last updated
- 2013-03-26
Frequently asked questions
- What is Diana Johnstone's NPI number?
- Diana Johnstone's National Provider Identifier (NPI) is 1740454057, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Johnstone's specialty?
- Diana Johnstone is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Diana Johnstone located?
- Diana Johnstone's practice location on file with NPPES is 4200 N Holton St, Milwaukee, WI 53212-1064.
- What is Diana Johnstone's phone number?
- The practice phone number listed in the NPPES registry for Diana Johnstone is (414) 988-6980.
- Is Diana Johnstone's NPI active?
- Yes — Diana Johnstone's NPI (1740454057) is active in the NPPES registry as of the last update on 2013-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.