NPPES file of Aug 9, 2026

Marissa J. Block, LMSW

Social Worker · New York, NY

Marissa J. Block, LMSW is a social worker with a practice address in New York, New York, and NPI 1720391766, issued on Jul 20, 2010. Check the license (New York 081358, as entered in NPPES) with the New York board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1720391766
Name
Marissa J. Block
Credential
LMSW
Primary taxonomy
Social Worker 104100000X
License number
081358 NY
Self-reported in NPPES; status is on the state search
Practice location
1824 Madison Ave, New York, NY 10035
Phone
(212) 423-4500
Enumerated
Jul 20, 2010
Record last updated
Jul 20, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(212) 423-4577
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest social worker records → All 23,561 in New York → Look up another NPI →

Also registered at 1824 Madison Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Zakiyyah Abdul-Mateen, LCSWClinical Social Worker1689050411
  2. Oluwafunmilayo Agoro, MDStudent in an Organized Health Care Education/Training Program1386431435
  3. Dimitri Alvarez, MDFamily Medicine Physician1114184637
  4. Sarah Baden, M.D.Family Medicine Physician1386007896
  5. Brittany BaumGeneral Practice Dentistry1740845965
  6. Neda BehrouziPsychiatric/Mental Health Nurse Practitioner1780090027

Verify Marissa J. Block in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New York board licenses this profession
    Search for license 081358    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the New York license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Marissa J. Block among 23,561 social worker records in New York

Marissa J. Block, LMSW is one of 23,561 social worker records with a practice address in New York. 3% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2010, is newer than 13% of them.

  • NPI issued2010 · 13% of these records are older, 85% newer
  • In a Medicare fileNo · 3% of these records are
  • In the CMS Doctors and Clinicians fileNo · 5% of these records are
  • Record last updated2010 · 53% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

4,353 social worker records list a practice address in New York

They are 4,353 of the 98,468 NPPES records with a practice address in New York, and 23,561 social worker records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 23,561 in New York → Every provider in New York → Social Worker nationwide →

The 8 social worker records with the nearest ZIP codes

  1. Alexandra Backis, LCSWNew York, NY 100351104107911
  2. Astin Brown, LMSWNew York, NY 100351740593615
  3. Diane Goldman, LCSW-RNew York, NY 100351992096499
  4. Allison Hesterman, LMSWNew York, NY 100351134425945
  5. Elizabeth Hyde, LMSWNew York, NY 100351134487663
  6. Deborah Leitner, LCSWNew York, NY 100351679719330
  7. Kiran Malpe, LMSWNew York, NY 100351982980785
  8. Tina Pack, LMSWNew York, NY 100351720362304

Common questions

What is Marissa J. Block, LMSW's NPI number?

Marissa J. Block, LMSW's National Provider Identifier (NPI) is 1720391766, issued on Jul 20, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Marissa J. Block, LMSW located?

The NPPES record lists a practice address at 1824 Madison Ave, New York, NY, 10035. Phone: (212) 423-4500. Providers update this record themselves, so call before visiting.

How can I verify Marissa J. Block, LMSW's license?

NPPES lists New York license number 081358, 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), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.