Holli Flack, LMSW
NPI 1063099026 · Social Worker · New York, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holli Flack, LMSW is a Social Worker provider in New York, NY (NPI 1063099026).
Provider details
- NPI number
- 1063099026
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 109650 (NY)
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
5 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
- 2021-03-25
- Last updated
- 2021-03-25
- Certified
- 2021-03-25
Frequently asked questions
- What is Holli Flack's NPI number?
- Holli Flack's National Provider Identifier (NPI) is 1063099026, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holli Flack's specialty?
- Holli Flack is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Holli Flack located?
- Holli Flack's practice location on file with NPPES is 83 Maiden Ln, New York, NY 10038-4812.
- What is Holli Flack's phone number?
- The practice phone number listed in the NPPES registry for Holli Flack is (212) 809-6651.
- Does Holli Flack accept Medicare?
- Holli Flack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holli Flack's NPI active?
- Yes — Holli Flack's NPI (1063099026) is active in the NPPES registry as of the last update on 2021-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.