Mark Flanzraich, DSW, LCSW
NPI 1639137466 · Clinical Social Worker · New Hyde Park, NY
Mark Flanzraich, DSW, LCSW is a Clinical Social Worker provider in New Hyde Park, NY (NPI 1639137466).
Provider details
- NPI number
- 1639137466
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- DSW, LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- P022581
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
20 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
- 2006-05-02
- Last updated
- 2012-10-17
Frequently asked questions
- What is Mark Flanzraich's NPI number?
- Mark Flanzraich's National Provider Identifier (NPI) is 1639137466, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Flanzraich's specialty?
- Mark Flanzraich is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Flanzraich located?
- Mark Flanzraich's practice location on file with NPPES is 34 Daley St, New Hyde Park, NY 11040-3604.
- What is Mark Flanzraich's phone number?
- The practice phone number listed in the NPPES registry for Mark Flanzraich is (516) 741-6166.
- Is Mark Flanzraich's NPI active?
- Yes — Mark Flanzraich's NPI (1639137466) is active in the NPPES registry as of the last update on 2012-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.