Individual provider Active NPI

Barbara Zwolska-Demczuk, MD

  • Anesthesiology Physician
  • Newark, NJ
National Provider Identifier
1114997053
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiology PhysicianTaxonomy code 207L00000X
License
25MA04022100 Issued in NJ
Practice address
201 Lyons Ave
Newark, NJ 07112-2027
Phone
(201) 943-0034
Fax
(201) 943-8105
NPI assigned
Jan 24, 2006
Last updated
Jul 13, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Anesthesiology Physician 207L00000X 25MA04022100 NJ Primary

Addresses

Primary practice location

201 Lyons Ave
Newark, NJ 07112-2027

Mailing address

PO Box 724
Millburn, NJ 07041-0724
Phone (201) 943-0034

Other identifiers 1

IdentifierTypeStateIssuer
0263508MedicaidNJ

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
25MA04022100NJMDAnesthesiology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
American Anesthesiology of New Jersey, P.C. Anesthesiology PastSince Jan 31, 2021 Accepting new patients

Interoperability endpoints

  • FHIR API: https://fhir-myrecord.cerner.com/r4/430a7ff7-9999-4cda-a19f-fb8b573704c8/

Organizations & group practices 1

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.

NPI Registry JSON

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

{
    "created_epoch": "1138060800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1114997053",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 724",
            "city": "MILLBURN",
            "state": "NJ",
            "postal_code": "070410724",
            "telephone_number": "201-943-0034",
            "fax_number": "201-943-8105"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "201 LYONS AVE",
            "city": "NEWARK",
            "state": "NJ",
            "postal_code": "071122027",
            "telephone_number": "201-943-0034",
            "fax_number": "201-943-8105"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ZWOLSKA-DEMCZUK",
        "first_name": "BARBARA",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-01-24",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "NJ",
            "license": "25MA04022100",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0263508",
            "state": "NJ"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Newark, NJ

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.