MS. ISOBEL O'RIORDAN MD
NPI 1487326328
Otolaryngology - Pediatric Otolaryngology in Boston, MA

Q: What is Isobel O'riordan's NPI number?

The NPI number for Isobel O'riordan is 1487326328. It was assigned to this individual provider in the NPPES registry on September 29, 2021.

Q: What is Isobel O'riordan's specialty?

The primary specialty registered for this NPI is Otolaryngology, specializing in Pediatric Otolaryngology, with taxonomy code 207YP0228X.

Q: When was this NPI record last updated?

The NPPES record for Isobel O'riordan was last updated on July 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 September 29, 2021PECOS Enrolled

300 LONGWOOD AVE, BOSTON, MA 02115(617) 355-6000 Get Directions Write a Review

NPPES record last updated: July 7, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 7, 2026, Feb 23, 2023, Sep 29, 2021 (3 updates tracked since 2021).

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About Ms. Isobel O'riordan Md NPPES

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

MS. ISOBEL O'RIORDAN MD (NPI 1487326328) is an individual pediatric otolaryngology provider in Boston, Massachusetts, licensed in Massachusetts (1027595) and active in the NPI registry since September 2021. She is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1487326328

Entity TypeIndividualFemale

Primary Taxonomy207YP0228X

Provider Legal NameMS. ISOBEL O'RIORDANCredential: MD

Location Address300 LONGWOOD AVEBoston, MA 02115-5724

Mailing Address300 Longwood AveBoston, MA 02115-5724 · (617) 355-6000

Phone(617) 355-6000

Sole ProprietorNo

Medical School CMSOtherGraduated 2014

Enumeration DateSeptember 29, 2021

Last NPPES UpdateJuly 7, 20263 updates tracked since enumeration

NPPES CertifiedJuly 7, 2026

✔ NPI 1487326328 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngology · Pediatric OtolaryngologyAllopathic & Osteopathic Physicians

Taxonomy Code207YP0228X

License✔ Licensed in MA · 1027595

Definition

A pediatric otolaryngologist has special expertise in the management of infants and children with disorders that include congenital and acquired conditions involving the aerodigestive tract, nose and paranasal sinuses, the ear and other areas of the head and neck. The pediatric otolaryngologist has special skills in the diagnosis, treatment, and management of childhood disorders of voice, speech, language and hearing.

300 LONGWOOD AVE, Boston, MA 02115

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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.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. Isobel O'riordan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4284198680

PECOS Enrollment IDI20260715003990

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 Reassignment

Medicare enrollment records show Isobel O'riordan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Chmc Otolaryngologic Foundation, Inc

Same address

Otolaryngology

300 LONGWOOD AVE
Boston, MA 02115

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

NPI 1124118229 (617) 355-6460

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 20

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

JULIE ANN HANSEN LCSW

Social Worker (Clinical)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (857) 218-4309

MS. ANNA ROGLIERI

Nurse Practitioner (Psychiatric/Mental Health)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

STEPHEN G. FLYNN M.D.

Anesthesiology (Pediatric Anesthesiology)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

MRS. LAUREN ASHLEY SHARIS P.T., D.P.T

Physical Therapist

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-7216

MS. SOYUN KWAN LICSW

Social Worker (Clinical)

300 LONGWOOD AVE, CHILDREN'S HOSPITAL BOSTON
BOSTON, MA 02115

Suffolk County (617) 355-0567

PUJA BANKA M.D.

Pediatrics

300 LONGWOOD AVE, BADER 203
BOSTON, MA 02115

Suffolk County (617) 355-6363

MR. COURTNEY SULLIVAN FRATTO CPNP

Nurse Practitioner (Pediatrics)

300 LONGWOOD AVE, HUNNEWELL BUILDING 322
BOSTON, MA 02115

Suffolk County (857) 218-4085

DR. ELIZABETH S TAGLAUER M.D., PH.D.

Pediatrics (Neonatal-Perinatal Medicine)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

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 Isobel O'riordan's NPI number?

The NPI number for Isobel O'riordan is 1487326328. It was assigned to this individual provider in the NPPES registry on September 29, 2021.

Where is Isobel O'riordan located?

Isobel O'riordan practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.

What is Isobel O'riordan's specialty?

The primary specialty registered for this NPI is Otolaryngology, specializing in Pediatric Otolaryngology, with taxonomy code 207YP0228X.

Is Isobel O'riordan enrolled in Medicare?

Yes. Isobel O'riordan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Isobel O'riordan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Isobel O'riordan reassigns Medicare benefits to Chmc Otolaryngologic Foundation, Inc (Boston, MA). 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 Isobel O'riordan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Isobel O'riordan accept?

Health plans from Anthem Blue Cross and Blue Shield list Isobel O'riordan 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 Isobel O'riordan was last updated on July 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.