OLIVIA ANN BRENNAN AU.D.
NPI 1750263992
Audiologist in Sayville, NY

Q: What is Olivia Brennan's NPI number?

The NPI number for Olivia Brennan is 1750263992. It was assigned to this individual provider in the NPPES registry on July 21, 2025.

Q: What is Olivia Brennan's specialty?

The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.

Q: When was this NPI record last updated?

The NPPES record for Olivia Brennan was last updated on July 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.

Active since July 21, 2025

58 S MAIN ST, SAYVILLE, NY 11782(631) 750-6377(518) 504-6661 Get Directions Write a Review

NPPES record last updated: July 21, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Olivia Ann Brennan Au.d. NPPES

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

OLIVIA ANN BRENNAN AU.D. (NPI 1750263992) is an individual audiologist in Sayville, New York, licensed in New York (3492387) and active in the NPI registry since July 2025.

NPPES Registry Identity

NPI1750263992

Entity TypeIndividualFemale

Primary Taxonomy231H00000X

Provider Legal NameOLIVIA ANN BRENNANCredential: AU.D.

Location Address58 S MAIN STSayville, NY 11782-3104

Mailing Address58 S Main StSayville, NY 11782-3104 · (631) 750-6377 · Fax (518) 504-6661

Phone(631) 750-6377

Fax(518) 504-6661

Sole ProprietorNo

Enumeration DateJuly 21, 2025

NPPES CertifiedJuly 21, 2025

✔ NPI 1750263992 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAudiologistSpeech, Language and Hearing Service Providers

Taxonomy Code231H00000X

License✔ Licensed in NY · 3492387

Definition

(1) A specialist in evaluation, habilitation and rehabilitation of those whose communication disorders center in whole or in part in hearing function. Audiologists are autonomous professionals who identify, assess, and manage disorders of the auditory, balance and other neural systems. Audiologists provide audiological (aural) rehabilitation to children and adults across the entire age span. Audiologists select, fit and dispense amplification systems such as hearing aids and related devices. (2) An audiologist is a person qualified by a master's degree in audiology, licensed by the state, where applicable, and practicing within the scope of that license. Audiologists evaluate and treat patients with impaired hearing. They plan, direct and conduct rehabilitative programs with audiotry substitutional devises (hearing aids) and other therapy.

58 S MAIN ST, Sayville, NY 11782

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Olivia Ann Brennan Au.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

Medicare enrollment records show Olivia Brennan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Audiology Services Company Usa, LLC

0.6 mi

Hearing and Speech

58 S MAIN ST
Sayville, NY 11782

Reassigned Medicare billing, New York enrollment
25 clinicians in this Medicare group

NPI 1689156770 (631) 750-6376

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 2

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

SAYVILLE HEARING SERVICES

Clinic/Center (Hearing and Speech)

58 S MAIN ST
SAYVILLE, NY 11782

Suffolk County (631) 750-6377

AUDIOLOGY SERVICES COMPANY USA, LLC

Clinic/Center (Hearing and Speech)

58 S MAIN ST
SAYVILLE, NY 11782

Suffolk County (631) 750-6376

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 Olivia Brennan's NPI number?

The NPI number for Olivia Brennan is 1750263992. It was assigned to this individual provider in the NPPES registry on July 21, 2025.

Where is Olivia Brennan located?

Olivia Brennan practices at 58 S Main St, Sayville, NY 11782. The listed phone number is (631) 750-6377.

What is Olivia Brennan's specialty?

The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.

Is Olivia Brennan enrolled in Medicare?

Yes. Olivia Brennan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Olivia Brennan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Olivia Brennan reassigns Medicare benefits to Audiology Services Company Usa, LLC (Sayville, NY). The 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 Olivia Brennan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Olivia Brennan was last updated on July 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.