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MARK ZELNICK INC
NPI 1164708939
Audiologist-Hearing Aid Fitter in Brooklyn, NY

Active since October 25, 2011
2204 FLATBUSH AVE, BROOKLYN, NY 11234(718) 252-0557(718) 692-1577 Get Directions Write a Review

NPPES record last updated: October 25, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mark Zelnick Inc NPPES

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

MARK ZELNICK INC (NPI 1164708939) is a healthcare organization registered as an audiologist-hearing aid fitter in Brooklyn, New York and active in the NPI registry since October 2011. The organization lists Mark I Zelnick, Audiologist, as its authorized official.

NPPES Registry Identity

NPI1164708939
Entity TypeOrganization
Primary Taxonomy237600000X
Legal Business NameMARK ZELNICK INC
Location Address2204 FLATBUSH AVEBrooklyn, NY 11234-4516
Mailing Address2204 Flatbush AveBrooklyn, NY 11234-4516 · (718) 252-0557 · Fax (718) 692-1577
Phone(718) 252-0557
Fax(718) 692-1577
Organization SubpartNo
Authorized OfficialMark I ZelnickAudiologist · (718) 252-0557
Enumeration DateOctober 25, 2011
✔ NPI 1164708939 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAudiologist-Hearing Aid FitterSpeech, Language and Hearing Service Providers
Taxonomy Code237600000X
License✔ Licensed in NY · 452
Definition
An audiologist/hearing aid fitter is the professional who specializes in evaluating and treating people with hearing loss, conducts a wide variety of tests to determine the exact nature of an individual's hearing problem, presents a variety of treatment options to patients, dispenses and fits hearing aids, administers tests of balance to evaluate dizziness and provides hearing rehabilitation training. This classification should be used where individuals are licensed as audiologist-hearing aid fitters as opposed to states that license individuals as audiologists.
2204 FLATBUSH AVE, Brooklyn, NY 11234
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Other Identifiers 2

Medicare UPINM00791NY
Medicaid01225043NY

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Zelnick Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by January 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateNew YorkEnrollment IDO20111219000248Non-DME Part B · Clinic/Group PracticeDue dateJanuary 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Mark Zelnick Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Mark Zelnick, AU.D.
Qualified Audiologist
NPI 1316015340
2204 FLATBUSH AVE
Brooklyn, NY 11234
(718) 252-0557
✔ Accepts MedicareSame address

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

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 Mark Zelnick Inc's NPI number?

The NPI number for Mark Zelnick Inc is 1164708939. It was assigned to this organization in the NPPES registry on October 25, 2011.

Where is Mark Zelnick Inc located?

Mark Zelnick Inc is located at 2204 Flatbush Ave, Brooklyn, NY 11234. The listed phone number is (718) 252-0557.

What is Mark Zelnick Inc's specialty?

The primary specialty registered for this NPI is Audiologist-Hearing Aid Fitter with taxonomy code 237600000X.

Is Mark Zelnick Inc enrolled in Medicare?

Yes. Mark Zelnick Inc is registered in the Medicare PECOS enrollment system.

When is Mark Zelnick Inc's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (New York, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Mark Zelnick Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Qualified Audiologist) reassigns their Medicare billing to Mark Zelnick Inc. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Mark Zelnick Inc was last updated on October 25, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.