Nadim T Zyadeh, MD

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

30881 Issued in AZ

Practice address

5815 N Black Canyon Hwy Ste 101
Phoenix, AZ 85015-2200

Phone

(602) 973-6666

Fax

(602) 812-3395

NPI assigned

Aug 9, 2005

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 3

Medicare fee-for-service enrollment

Enrolled in AZ

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

Specialty

GastroenterologyAlso: Internal Medicine

Education

Other, 1996

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Practice addresses (Care Compare)

Hospital & facility affiliations

• Round Rock Medical Center Hospital, Round Rock, TX, CCN 450718

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir4.healow.com/fhir/r4/GCGDCA/Endpoint/GCGDCA

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

• Adult Gastroenterology, P.L.L.C.

  • Gastroenterology Physician
  • Phoenix, AZ
  • NPI 1104019413
  Medicare reassignment NPD Authorized official

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• St Davids Healthcare Partnership LP LLP

  • General Acute Care Hospital
  • Round Rock, TX
  • NPI 1649223645
  Care Compare affiliation

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

{
    "created_epoch": "1123545600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769040000000",
    "number": "1609877935",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5815 N BLACK CANYON HWY STE 101",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850152200",
            "telephone_number": "602-973-6666",
            "fax_number": "602-812-3395"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5815 N BLACK CANYON HWY STE 101",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850152200",
            "telephone_number": "602-973-6666",
            "fax_number": "602-812-3395"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ZYADEH",
        "first_name": "NADIM",
        "middle_name": "T",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-08-09",
        "last_updated": "2026-01-22",
        "certification_date": "2026-01-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "AZ",
            "license": "30881",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA",
            "identifier": "A7998438",
            "state": "AZ"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS BLUE SHIELD",
            "identifier": "AZ0734070",
            "state": "AZ"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "776304",
            "state": "AZ"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Jill Reiss Zweig, DO
• Rebecca Ann Zwick, FNP
• Alyssa Zwicker
• Nathan Paul Zwintscher, M.D.
• Jennifer Dorothea Zwirek
• Deanna Zylstra
• Aimee Sonya Zytcer
• Thomas Leon Zywczyk
• Aaron Zyzda

• Gastroenterology Physician in Phoenix, AZ
• Providers in Phoenix, AZ by specialty
• Gastroenterology Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 22, 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.