James N Dreyfus, MD

Primary specialty

Rheumatology PhysicianTaxonomy code 207RR0500X

License

01032593 Issued in IN

Practice address

10110 Don S Powers Dr Ste 101D
Munster, IN 46321-4070

Phone

(219) 670-4421

NPI assigned

Mar 22, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in IN

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Interoperability endpoints

• Direct secure messaging: jdreyfus64089@direct.franciscanalliance.org

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

{
    "created_epoch": "1142985600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765756800000",
    "number": "1083673552",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1600 GREEN BAY RD APT 304",
            "city": "HIGHLAND PARK",
            "state": "IL",
            "postal_code": "600355716",
            "telephone_number": "219-670-4421"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10110 DON S POWERS DR STE 101D",
            "city": "MUNSTER",
            "state": "IN",
            "postal_code": "463214070",
            "telephone_number": "219-670-4421"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DREYFUS",
        "first_name": "JAMES",
        "middle_name": "N",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-03-22",
        "last_updated": "2025-12-15",
        "certification_date": "2025-12-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "IN",
            "license": "01032593",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "200044440A",
            "state": "IN"
        }
    ],
    "endpoints": [],
    "other_names": []
}

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• John W Drone, D.D.S.
• Kathryn Druzbicki, LMHC
• Don H Dumont, MD
• Janice Kay Duncker, PT
• Richard Duttweiler, PHYSICAL THERAPIST

• All providers in Munster, IN
• Rheumatology Physician in Indiana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 15, 2025; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.