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MS. GRETA MARIE GLEISSNER LCSW
NPI 1881928539
Social Worker in New York, NY

Active since September 29, 2009PECOS Enrolled
57 W 57TH ST STE 1101, NEW YORK, NY 10019(917) 373-4557 Get Directions Write a Review

NPPES record last updated: July 25, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Ms. Greta Marie Gleissner Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. GRETA MARIE GLEISSNER LCSW (NPI 1881928539) is an individual social worker in New York, New York and active in the NPI registry since September 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1881928539
Entity TypeIndividualFemale
Primary Taxonomy104100000X
Provider Legal NameMS. GRETA MARIE GLEISSNERCredential: LCSW
Location Address57 W 57TH ST STE 1101New York, NY 10019-2814
Mailing Address459 Columbus Ave Ste 124New York, NY 10024-5129 · (917) 373-4557
Phone(917) 373-4557
Sole ProprietorNo
Enumeration DateSeptember 29, 2009
Last NPPES UpdateJuly 25, 2023
NPPES CertifiedJuly 25, 2023
✔ NPI 1881928539 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
57 W 57TH ST STE 1101, New York, NY 10019
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Greta Marie Gleissner Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Greta Gleissner reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Clinical Therapeutic Support Lcsw PC
Same address
Clinical
57 W 57TH ST STE 1101
New York, NY 10019
  • Reassigned Medicare billing, New York enrollment
  • 13 clinicians in this Medicare group
NPI 1851805345 (917) 373-4557
Well Behavioral Health LLC
Same address
Mental Health (Including Community Mental Health Center)
57 W 57TH ST STE 1004
New York, NY 10019
  • Reassigned Medicare billing, New York enrollment
NPI 1649123464 (888) 961-4709

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SANCTUARY PSYCHOLOGY
Clinic/Center (Adult Mental Health)
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (800) 381-7340
EMMA ROSEMARIE BURNETT LMSW
Social Worker
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (866) 525-2766
MILAGROS CHATELAIN MHC-LP
Counselor (Mental Health)
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (800) 381-7340
MANHATTAN INTEGRATIVE PSYCHIATRY P.C.
Psychiatry & Neurology (Psychiatry)
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (212) 722-2232
MS. PATRICE CONSTANCE ANASTASIO
Counselor (Mental Health)
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (646) 996-2187
SANCTUARY ASO LLC
Clinic/Center (Adult Mental Health)
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (941) 363-0878
CALIOPIE GEORGIADIS WALSH
Counselor (Mental Health)
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (800) 381-7340
MARY PIVARUNIS LMFT
Marriage & Family Therapist
57 W 57TH ST STE 1101
NEW YORK, NY 10019
New York County (415) 686-6970

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Greta Gleissner's NPI number?

The NPI number for Greta Gleissner is 1881928539. It was assigned to this individual provider in the NPPES registry on September 29, 2009.

Where is Greta Gleissner located?

Greta Gleissner practices at 57 W 57th St Ste 1101, New York, NY 10019. The listed phone number is (917) 373-4557.

What is Greta Gleissner's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

Is Greta Gleissner enrolled in Medicare?

Yes. Greta Gleissner is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Greta Gleissner's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Greta Gleissner reassigns Medicare benefits to 2 organizations: Clinical Therapeutic Support Lcsw PC (New York, NY) and Well Behavioral Health LLC (New York, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Greta Gleissner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Greta Gleissner accept?

Health plans from Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and Oscar Health list Greta Gleissner as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Greta Gleissner was last updated on July 25, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.