Mary Alexander, LCSW
Social Worker · Brooklyn, NY
Mary Alexander, LCSW is a social worker with a practice address in Brooklyn, New York, and NPI 1629657358, issued on Apr 8, 2021. Check the license (New York 100078, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Alexander
- Credential
- LCSW
- Primary taxonomy
- Social Worker 104100000X
- License numbers
- 100078 NY
6801108341 MI
104233 TX
Self-reported in NPPES; status is on the state search - Practice location
- 134 N 4TH St, Brooklyn, NY 11249
- Phone
- (757) 831-7966
- Enumerated
- Apr 8, 2021
- Entity
- Type 1 · individual
Also registered at 134 N 4TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jose Aguilar, APRNRegistered Nurse1194184242
- Loretta Avallone, LCSWClinical Social Worker1053040337
- Gulsanam Azieva, LMHCMental Health Counselor1013636844
- Quanasha Baity, LMSWClinical Social Worker1598411431
- Molly Barak, LMHCMental Health Counselor1306592282
- Lauren BardsleySocial Worker1952052581
Verify Mary Alexander in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 100078Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
One hospital or facility affiliation
- Valera Medical PCBrooklyn, NY
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
3,831 social worker records list a Brooklyn practice address
They are 3,831 of the 64,057 NPPES records with a Brooklyn practice address, and 24,800 social worker records in New York.
All 3,831 in Brooklyn → All 24,800 in New York → Every provider in Brooklyn →
Other social worker records in New York
- Sheila AagnerNew York, NY1801720784
- Desiree AaronBronx, NY1851277875
- Joy Aaron, LMSWAlbany, NY1295376192
- Shawna Marie Aarons-Cooke, LCSWNew Rochelle, NY1700060076
- Fay Aaronson, LCSW-RMargaretville, NY1710253224
- Iliana Abad, LMSWBrooklyn, NY1427328194
- Samantha AbadNew York, NY1831948561
- Angelyse Abalco, LMSWSmithtown, NY1083255251
- Nicola Abbadessa, LCSWRego Park, NY1235239310
- Fadhil AbbasBuffalo, NY1588222418
Common questions
What is Mary Alexander, LCSW's NPI number?
Mary Alexander, LCSW's National Provider Identifier (NPI) is 1629657358, issued on Apr 8, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Mary Alexander, LCSW located?
The NPPES record lists a practice address at 134 N 4TH St, Brooklyn, NY, 11249. Phone: (757) 831-7966. Providers update this record themselves, so call before visiting.
How can I verify Mary Alexander, LCSW's license?
NPPES lists New York license number 100078, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.