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KATHERINE A DUFFY AUD
NPI 1407376080
Audiologist in Bel Air, MD

Active since June 23, 2017
5 BEL AIR SOUTH PKWY STE N1411, BEL AIR, MD 21015(410) 569-3800(443) 320-9468 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Jul 18, 2017, Jun 23, 2017 (3 updates tracked since 2017).

About Katherine A Duffy Aud NPPES

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

KATHERINE A DUFFY AUD (NPI 1407376080) is an individual audiologist in Bel Air, Maryland, licensed in Maryland (01427) and active in the NPI registry since June 2017.

NPPES Registry Identity

NPI1407376080
Entity TypeIndividualFemale
Primary Taxonomy231H00000X
Provider Legal NameKATHERINE A DUFFYCredential: AUD
Location Address5 BEL AIR SOUTH PKWY STE N1411Bel Air, MD 21015-6091
Mailing Address5 Bel Air South Pkwy Ste N1411Bel Air, MD 21015-6091 · (410) 569-3800 · Fax (443) 320-9468
Phone(410) 569-3800
Fax(443) 320-9468
Sole ProprietorNo
Enumeration DateJune 23, 2017
Last NPPES UpdateJuly 21, 20223 updates tracked since enumeration
✔ NPI 1407376080 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 MD · 01427
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.
5 BEL AIR SOUTH PKWY STE N1411, Bel Air, MD 21015
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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)

Katherine A Duffy Aud is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

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

Harmony Hearing & Audiology, LLC
0.1 mi
Audiologist
5 BEL AIR SOUTH PKWY, SUITE N1411
Bel Air, MD 21015
  • Reassigned Medicare billing, Maryland enrollment
  • 5 clinicians in this Medicare group
NPI 1548437734 (443) 910-1591

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

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Comprehensive hearing and speech recognition test 92557
A comprehensive hearing and speech recognition test assesses your ability to hear and understand spoken words. It includes hearing tests to check for issues with sound perception and speech tests to evaluate your word recognition. It's a crucial step in identifying any hearing or speech problems.
82 services81 patients
Test for eardrum and muscle function 92550
This test assesses the health of your eardrum and muscles linked to hearing. A small device is placed in your ear that creates pressure changes and sounds. Your ear's responses are recorded to determine if they are functioning properly.
80 services79 patients
Placement of ear probe for computerized measurement of repeated sounds with interpretation and report 92588
This procedure involves placing a probe in your ear to measure how it responds to repeated sounds. The data is then interpreted by a computer to assess your hearing health. The findings are compiled into a report for further evaluation.
33 services33 patients

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 Katherine Duffy's NPI number?

The NPI number for Katherine Duffy is 1407376080. It was assigned to this individual provider in the NPPES registry on June 23, 2017.

Where is Katherine Duffy located?

Katherine Duffy practices at 5 Bel Air South Pkwy Ste N1411, Bel Air, MD 21015. The listed phone number is (410) 569-3800.

What is Katherine Duffy's specialty?

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

Is Katherine Duffy enrolled in Medicare?

Yes. Katherine Duffy is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Katherine Duffy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Duffy reassigns Medicare benefits to Harmony Hearing & Audiology, LLC (Bel Air, MD). 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 Katherine Duffy'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 Katherine Duffy was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.