Katherine Duffy, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

25MP00906000 Issued in NJ

Practice address

100 E 77TH St
New York, NY 10075-1850

Phone

(212) 434-2000

NPI assigned

Oct 20, 2022

Last updated

Jan 9, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NY, NJ2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 2

Specialty

Physician Assistant

Education

Other, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Barnabas Health Medical Group PCGroup PAC ID 9537316955, 1,027 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Networks

• Healthfirst Medicare Network H5989
• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H9678
• Healthfirst Medicare Network H3359

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Barnabas Health Medical Group PC

  • Specialist
  • Elizabeth, NJ
  • NPI 1841557246

  Single Specialty

  Medicare reassignment Care Compare group NPD
• North Shore-Lij Medical PC

  dba NHPP Cardiology at Great Neck

  • Urology Physician
  • Great Neck, NY
  • NPI 1053688572

  Single Specialty

  Medicare reassignment NPD
• Barnabas Health Medical Group PC

  • Durable Medical Equipment & Medical Supplies
  • Hackensack, NJ
  • NPI 1316772668
  NPD

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1666224000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767916800000",
    "number": "1598482689",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "720 FOREST AVE",
            "city": "WESTFIELD",
            "state": "NJ",
            "postal_code": "070904323"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 E 77TH ST",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100751850",
            "telephone_number": "212-434-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DUFFY",
        "first_name": "KATHERINE",
        "credential": "PA-C",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2022-10-20",
        "last_updated": "2026-01-09",
        "certification_date": "2026-01-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NJ",
            "license": "25MP00906000",
            "primary": true
        },
        {
            "code": "2084V0102X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Vascular Neurology",
            "state": "NY",
            "license": "029188",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Eamon Duffy, MD
• Ellen Marie Duffy, MS.ED
• Erin Duffy, PHARM D
• Janet Duffy, LMHC, LPC
• John James Duffy
• Kathryn Duffy, LAC
• Keven Duffy, LCSW
• McKenna Duffy
• Meghan Duffy, MSED
• Meghan Barbara Duffy, RN

• Physician Assistant in New York, NY
• Providers in New York, NY by specialty
• Physician Assistant in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 9, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.