Yousef Nassar

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

036158704 Issued in IL

Practice address

4400 W 95TH St Ste 310
Oak Lawn, IL 60453-2660

Phone

(708) 684-9230

NPI assigned

Jun 10, 2016

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Electronic endpoints 3

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

Gastroenterology

Education

Other, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mount Sinai Community FoundationGroup PAC ID 5991600405, 247 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mt Sinai Hospital Medical Center Hospital, Chicago, IL, CCN 140018
• Holy Cross Hospital Hospital, Chicago, IL, CCN 140133

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Practice roles

Locations

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.

• Mount Sinai Community Foundation

  dba Sinai Medical Group

  • Rehabilitation Hospital
  • Chicago, IL
  • NPI 1376715896

  Single Specialty

  Medicare reassignment Care Compare group NPD
• Advocate Health and Hospitals Corporation

  dba Advocate Medical Group

  • Multi-Specialty Clinic/Center
  • Oak Brook, IL
  • NPI 1700824455
  Medicare reassignment
• Mount Sinai Community Foundation

  dba Sinai Medical Group

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1982657854

  Single Specialty

  NPD

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

• Holy Cross Hospital

  • Psychiatric Hospital Unit
  • Chicago, IL
  • NPI 1427547538
  Care Compare affiliation
• Holy Cross Hospital

  • Substance Abuse Rehabilitation Facility
  • Chicago, IL
  • NPI 1770335770

  Hospital

  Care Compare affiliation
• Holy Cross Hospital

  • Substance Abuse Rehabilitation Facility
  • Chicago, IL
  • NPI 1821840828

  Hospital

  Care Compare affiliation
• Holy Cross Hospital

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1962425611
  Care Compare affiliation
• Mount Sinai Hospital Medical Center

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1871581314
  Care Compare affiliation

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

{
    "created_epoch": "1465516800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784851200000",
    "number": "1750730677",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "29373 NETWORK PL",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606731293",
            "telephone_number": "847-390-5900"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4400 W 95TH ST STE 310",
            "city": "OAK LAWN",
            "state": "IL",
            "postal_code": "604532660",
            "telephone_number": "708-684-9230"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "47 New Scotland Ave",
            "address_2": "Department of Medicine",
            "address_purpose": "LOCATION",
            "city": "Albany",
            "state": "NY",
            "postal_code": "122083412",
            "country_code": "US",
            "telephone_number": "518-262-5377",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NASSAR",
        "first_name": "YOUSEF",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2016-06-10",
        "last_updated": "2026-07-24",
        "certification_date": "2026-07-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036158704",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "IL",
            "license": "036158704",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "CONNECT",
            "endpointTypeDescription": "CONNECT URL",
            "endpoint": "https://esmd.abilitynetwork.com:8291/Gateway/DocumentSubmission/2_0/NhinService/XDRRequest_Service",
            "affiliation": "Y",
            "endpointDescription": "2.16.840.1.113883.3.667.2",
            "affiliationName": "ABILITY Network",
            "use": "OTHER",
            "useDescription": "Other",
            "useOtherDescription": "CMS esMD eMDR",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "64 S Price Rd",
            "address_2": "SteB",
            "city": "Brownsville",
            "state": "TX",
            "country_code": "US",
            "postal_code": "785212459",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "ynassar458383@direct.myadvocateaurora.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "4400 W 95th St Ste 310",
            "city": "Oak Lawn",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604532660",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "4400 W 95th St Ste 310",
            "city": "Oak Lawn",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604532660",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Ravi Kumar Narasimhan, M.D.
• Raquel Ruiz Nardi, RDH
• John Naret
• Mohammad Naseem, MD
• Tacara Nash
• Jamie Natale, D.N.P.
• Ashok Natarajan
• Melissa Nater, M.D.
• Maja M Naumczyk-Blanchard
• Faryna Vandalia Navar

• Gastroenterology Physician in Oak Lawn, IL
• Providers in Oak Lawn, IL by specialty
• Gastroenterology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 24, 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.