Mary Mcmahon, LCSW
NPI 1437816378 · Clinical Social Worker · South Hempstead, NY
Mary Mcmahon, LCSW is a Clinical Social Worker provider in South Hempstead, NY (NPI 1437816378).
Provider details
- NPI number
- 1437816378
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 070348 (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
4 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
- 2021-11-28
- Last updated
- 2021-11-28
- Certified
- 2021-11-28
Frequently asked questions
- What is Mary Mcmahon's NPI number?
- Mary Mcmahon's National Provider Identifier (NPI) is 1437816378, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Mcmahon's specialty?
- Mary Mcmahon is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Mcmahon located?
- Mary Mcmahon's practice location on file with NPPES is 509 Willow St, South Hempstead, NY 11550-8018.
- What is Mary Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Mary Mcmahon is (516) 946-3464.
- Is Mary Mcmahon's NPI active?
- Yes — Mary Mcmahon's NPI (1437816378) is active in the NPPES registry as of the last update on 2021-11-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.