Nancy Marsh, LCSW
NPI 1891988135 · Clinical Social Worker · Bethpage, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Marsh, LCSW is a Clinical Social Worker provider in Bethpage, NY (NPI 1891988135).
Provider details
- NPI number
- 1891988135
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 040372 (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
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
- 2007-08-21
- Last updated
- 2014-10-31
Frequently asked questions
- What is Nancy Marsh's NPI number?
- Nancy Marsh's National Provider Identifier (NPI) is 1891988135, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Marsh's specialty?
- Nancy Marsh is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Nancy Marsh located?
- Nancy Marsh's practice location on file with NPPES is 32 Sherman Ave, Bethpage, NY 11714-2422.
- What is Nancy Marsh's phone number?
- The practice phone number listed in the NPPES registry for Nancy Marsh is (516) 242-6627.
- Does Nancy Marsh accept Medicare?
- Nancy Marsh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Marsh's NPI active?
- Yes — Nancy Marsh's NPI (1891988135) is active in the NPPES registry as of the last update on 2014-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.