Sydney Seifert Lcsw PLLC
NPI 1134908569 · Clinical Social Worker · New York, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sydney Seifert Lcsw PLLC is a Clinical Social Worker organization in New York, NY (NPI 1134908569).
Provider details
- NPI number
- 1134908569
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Sydney Seifert, Buisness Owner(917) 822-8485
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
2 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
Other names (DBA / former)
- Doing business as
- Manhattan Mindful
Registry dates
- Enumerated
- 2023-09-25
- Last updated
- 2023-10-24
- Certified
- 2023-10-24
Frequently asked questions
- What is Sydney Seifert Lcsw PLLC's NPI number?
- Sydney Seifert Lcsw PLLC's National Provider Identifier (NPI) is 1134908569, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Sydney Seifert Lcsw PLLC?
- Sydney Seifert Lcsw PLLC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Sydney Seifert Lcsw PLLC located?
- Sydney Seifert Lcsw PLLC's practice location on file with NPPES is 25 Central Park W Apt 1u, New York, NY 10023-7214.
- What is Sydney Seifert Lcsw PLLC's phone number?
- The practice phone number listed in the NPPES registry for Sydney Seifert Lcsw PLLC is (917) 822-8485.
- Does Sydney Seifert Lcsw PLLC accept Medicare?
- Sydney Seifert Lcsw PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Sydney Seifert Lcsw PLLC?
- The authorized official listed on Sydney Seifert Lcsw PLLC's NPPES record is Sydney Seifert, Buisness Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Sydney Seifert Lcsw PLLC's NPI active?
- Yes — Sydney Seifert Lcsw PLLC's NPI (1134908569) is active in the NPPES registry as of the last update on 2023-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.