DR. JILLIAN O'SULLIVAN
NPI 1710863394
Audiologist in Boston, MA

Q: What is Jillian O'sullivan's NPI number?

The NPI number for Jillian O'sullivan is 1710863394. It was assigned to this individual provider in the NPPES registry on August 12, 2025.

Q: What is Jillian O'sullivan's specialty?

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

Active since August 12, 2025

243 CHARLES ST, BOSTON, MA 02114(617) 573-3266 Get Directions Write a Review

NPPES record last updated: September 22, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Jillian O'sullivan NPPES

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

DR. JILLIAN O'SULLIVAN (NPI 1710863394) is an individual audiologist in Boston, Massachusetts, licensed in Massachusetts (AUD100208) and active in the NPI registry since August 2025. She is affiliated with Massachusetts Eye And Ear Infirmary -, maintains a secondary practice location in Stoneham, and is a graduate of Other (2025).

NPPES Registry Identity

NPI1710863394

Entity TypeIndividualFemale

Primary Taxonomy231H00000X

Provider Legal NameDR. JILLIAN O'SULLIVAN

Location Address243 CHARLES STBoston, MA 02114-3002

Mailing Address243 Charles StBoston, MA 02114-3002 · (617) 573-3266

Phone(617) 573-3266

Sole ProprietorNo

Medical School CMSOtherGraduated 2025

Enumeration DateAugust 12, 2025

Last NPPES UpdateSeptember 22, 2025

NPPES CertifiedSeptember 22, 2025

✔ NPI 1710863394 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 MA · AUD100208

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.

243 CHARLES ST, Boston, MA 02114

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Secondary Practice Location 1

Location 141 Montvale Ave Ste 200Stoneham, MA 02180-2445 · Phone (781) 279-0971

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro 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)

Dr. Jillian O'sullivan is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7214433051

PECOS Enrollment IDI20251001001448

Medicare Billing Reassignments

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

Massachusetts Eye And Ear Associates, Inc.

Same address

Ophthalmology

243 CHARLES ST
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
478 clinicians in this Medicare group

NPI 1932574332 (617) 523-7900

Massachusetts Eye And Ear Infirmary

Same address

General Acute Care Hospital

243 CHARLES ST
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
54 clinicians in this Medicare group

NPI 1639101751 (617) 573-3089

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Massachusetts Eye And Ear Infirmary -

Acute Care Hospitals · Boston, MA

OwnershipVoluntary non-profit - Private

CMS Certification Number220075

Location243 Charles StreetBoston, MA 02114 · Suffolk County

Emergency services

Other Providers at the Same Location NPPES 20

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

CARLA PETERSEN AU.D., CCC-A

Audiologist

243 CHARLES ST, AUDIOLOGY DEPARTMENT
BOSTON, MA 02114

Suffolk County (617) 573-3266

DR. SULEMAN IMRAN KHAN MD

Ophthalmology

243 CHARLES ST
BOSTON, MA 02114

Suffolk County (617) 573-4443

DR. RYAN CARLSON MD PHD

Student in an Organized Health Care Education/Training Program

243 CHARLES ST
BOSTON, MA 02114

Suffolk County (617) 523-7900

MASSACHUSETTS EYE AND EAR INFIRMARY

Eyewear Supplier

243 CHARLES ST
BOSTON, MA 02114

Suffolk County (617) 573-3182

DANIEL ROBERT LEFEBVRE M.D.

Ophthalmology

243 CHARLES ST, 10TH FLOOR -- OPHTHALMIC PLASTIC SURGERY
BOSTON, MA 02114

Suffolk County (617) 523-7900

ELLIOTT D. KOZIN MD

Otolaryngology

243 CHARLES ST
BOSTON, MA 02114

Suffolk County (617) 573-6545

DR. LUCIA K SOMBERG MD, MPH

Emergency Medicine

243 CHARLES ST
BOSTON, MA 02114

Suffolk County (617) 573-3431

MS. JANET ENGLISH HUETTIG LICSW

Social Worker (Clinical)

243 CHARLES ST
BOSTON, MA 02114

Suffolk County (617) 573-3548

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 Jillian O'sullivan's NPI number?

The NPI number for Jillian O'sullivan is 1710863394. It was assigned to this individual provider in the NPPES registry on August 12, 2025.

Where is Jillian O'sullivan located?

Jillian O'sullivan practices at 243 Charles St, Boston, MA 02114. The listed phone number is (617) 573-3266.

What is Jillian O'sullivan's specialty?

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

Is Jillian O'sullivan enrolled in Medicare?

Yes. Jillian O'sullivan is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Jillian O'sullivan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jillian O'sullivan reassigns Medicare benefits to 2 organizations: Massachusetts Eye And Ear Associates, Inc. (Boston, MA) and Massachusetts Eye And Ear Infirmary (Boston, MA). 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 Jillian O'sullivan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jillian O'sullivan accept?

Health plans from Taro Health list Jillian O'sullivan 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.

Is Jillian O'sullivan affiliated with any hospitals?

According to CMS data, Jillian O'sullivan is affiliated with Massachusetts Eye And Ear Infirmary -.

When was this NPI record last updated?

The NPPES record for Jillian O'sullivan was last updated on September 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.