Donald Barzak, MSW
NPI 1598771198 · Clinical Social Worker · Saint Louis, MO
Donald Barzak, MSW is a Clinical Social Worker provider in Saint Louis, MO (NPI 1598771198).
Provider details
- NPI number
- 1598771198
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSW
- Sex
- Male
- Sole proprietor
- No
- License
- 001401 (MO)
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
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
- 2006-08-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Donald Barzak's NPI number?
- Donald Barzak's National Provider Identifier (NPI) is 1598771198, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Barzak's specialty?
- Donald Barzak is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Donald Barzak located?
- Donald Barzak's practice location on file with NPPES is 1 Jefferson Barracks Rd, Saint Louis, MO 63125-4181.
- What is Donald Barzak's phone number?
- The practice phone number listed in the NPPES registry for Donald Barzak is (314) 652-4100.
- Is Donald Barzak's NPI active?
- Yes — Donald Barzak's NPI (1598771198) 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.