Katherine A. Duffy, AUD
Audiologist · Bel Air, MD
Katherine A. Duffy, AUD is an audiologist with a practice address in Bel Air, Maryland, and NPI 1407376080, issued on Jun 23, 2017. Check the license (Maryland 01427, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine A. Duffy
- Credential
- AUD
- Primary taxonomy
- Audiologist 231H00000X
- License number
- 01427 MD
Self-reported in NPPES; status is on the state search - Practice location
- 5 Bel Air South Pkwy Ste N1411, Bel Air, MD 21015
- Phone
- (410) 569-3800
- Enumerated
- Jun 23, 2017
- Record last updated
- Jul 21, 2022
- Fax
- (443) 320-9468
- Medicare enrollment
- Enrolled (PECOS I20170828001262); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest audiologist records → All 519 in Maryland → Look up another NPI →
Verify Katherine A. Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 01427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Harmony Hearing And Audiology, LLCBel Air, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine A. Duffy among 519 audiologist records in Maryland
Katherine A. Duffy, AUD is one of 519 audiologist records with a practice address in Maryland. 43% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 62% of them.
- NPI issued2017 · 62% of these records are older, 34% newer
- In a Medicare fileYes · 43% of these records are
- In the CMS Doctors and Clinicians fileYes · 46% of these records are
- Graduated2017 · median 2014 among the 241 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 231H00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Audiologist providers in Maryland
There are 519 audiologist records in Maryland.
All 519 in Maryland → Every provider in Bel Air → Audiologist nationwide →
The 8 audiologist records with the nearest ZIP codes
- Molly Day, AUDBel Air, MD 210151104371533
- Catherine Durborow, AUDBel Air, MD 210151306317425
- Victoria KeseckerBel Air, MD 210151578248084
- Donna Pitts, AU.D., CCC-ABel Air, MD 210151538632229
- Deborah Allen, AU.D.Bel Air, MD 210141861563090
- Christine Cloonan, MA CCCABel Air, MD 210141679605133
- Susan Domzalski, AU.D.Bel Air, MD 210141841361078
- Maya Freund, AUDBel Air, MD 210141558921528
Common questions
What is Katherine A. Duffy, AUD's NPI number?
Katherine A. Duffy, AUD's National Provider Identifier (NPI) is 1407376080, issued on Jun 23, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Katherine A. Duffy, AUD located?
The NPPES record lists a practice address at 5 Bel Air South Pkwy Ste N1411, Bel Air, MD, 21015. Phone: (410) 569-3800. Providers update this record themselves, so call before visiting.
How can I verify Katherine A. Duffy, AUD's license?
NPPES lists Maryland license number 01427, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.