Muaz Nizar Assaf, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

W8803 Issued in TX

Practice address

3231 Euclid Ave
Berwyn, IL 60402-3471

Phone

(708) 783-7017

Fax

(770) 878-3334

NPI assigned

Apr 25, 2021

Last updated

Oct 28, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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 IL

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

Internal Medicine

Education

Other, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Methodist Medical Center of IllinoisGroup PAC ID 1355259714, 387 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Carle Health Methodist Hospital Hospital, Peoria, IL, CCN 140209

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: massafmd434689@carlehiedirect.net

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.

• Methodist Medical Center of Illinois

  • Rehabilitation Hospital Unit
  • Peoria, IL
  • NPI 1982656575
  Medicare reassignment Care Compare group NPD
• Carle Health Medical Group

  dba Carle Physician Group

  • Internal Medicine Physician
  • Urbana, IL
  • NPI 1154653947
  Medicare reassignment NPD
• Methodist Medical Center of Illinois

  • General Acute Care Hospital
  • Peoria, IL
  • NPI 1164474755
  NPD
• Methodist Medical Center of Illinois

  dba Methodist Medical Group

  • Family Medicine Physician
  • Peoria, IL
  • NPI 1184670663

  Internal Medicine

  NPD

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

• Methodist Medical Center of Illinois

  • General Acute Care Hospital
  • Peoria, IL
  • NPI 1164474755
  Care Compare affiliation

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

{
    "created_epoch": "1619308800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1793145600000",
    "number": "1497337802",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3231 EUCLID AVE",
            "city": "BERWYN",
            "state": "IL",
            "postal_code": "604023471",
            "telephone_number": "708-783-7017",
            "fax_number": "708-783-3341"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3231 EUCLID AVE",
            "city": "BERWYN",
            "state": "IL",
            "postal_code": "604023471",
            "telephone_number": "708-783-7017",
            "fax_number": "770-878-3334"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1924 Alcoa Hwy",
            "address_purpose": "LOCATION",
            "city": "Knoxville",
            "state": "TN",
            "postal_code": "379201511",
            "country_code": "US",
            "telephone_number": "865-305-9340",
            "fax_number": "865-305-9144",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ASSAF",
        "first_name": "MUAZ",
        "middle_name": "NIZAR",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-04-25",
        "last_updated": "2026-10-28",
        "certification_date": "2026-10-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036170605",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "W8803",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Melissa Marie Arredondo, M.D.
• Arze Doctors Center SC
• Ricardo Arze, M.D.
• Obadah Asbahi
• Udochukwu O Asonye, M.D.
• Rami Assaf, PTA
• Associates in Behavioral Science, LTD. (Associates in Behavioral Science)
• Athletico, LTD (AthletiCo Physical Therapy & Occupational Therapy)
• Nancy Atobrah
• Joel Augustin, MD

• Internal Medicine Physician in Berwyn, IL
• Providers in Berwyn, IL by specialty
• Internal Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 28, 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.