Greg Donald Ewert, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

Practice address

200 S Michigan Ave
Sutie 805
Chicago, IL 60604-2402

Phone

(312) 922-3815

Fax

(312) 922-3789

NPI assigned

May 5, 2006

Last updated

Jul 13, 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 1

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

University of Illinois College of Med (CHI/Peor/Rock/CHM-Urb), 1986

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northwestern Memorial Hospital Hospital, Chicago, IL, CCN 140281
• Northwestern Medicine Central Dupage Hospital Hospital, Winfield, IL, CCN 140242
• Northwestern Lake Forest Hospital Hospital, Lake Forest, IL, CCN 140130

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Greg D Ewert MD SC

  • Adolescent Medicine (Internal Medicine) Physician
  • Chicago, IL
  • NPI 1679969182
  Medicare reassignment NPD Authorized official
• Michigan Avenue Internists

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1922066588
  Authorized official Same address or phone

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

• Central Dupage Hospital Association

  dba Northwestern Medicine Central Dupage Hospital

  • General Acute Care Hospital
  • Winfield, IL
  • NPI 1003864810
  Care Compare affiliation
• Central Dupage Hospital Association

  dba Northwestern Medicine Central Dupage Hospital

  • Psychiatric Hospital Unit
  • Winfield, IL
  • NPI 1740230895
  Care Compare affiliation
• Northwestern Lake Forest Hospital

  dba Northwestern Medicine Lake Forest Hospital

  • General Acute Care Hospital
  • Lake Forest, IL
  • NPI 1124025176
  Care Compare affiliation
• Northwestern Memorial Hospital

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1497859649
  Care Compare affiliation

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

{
    "created_epoch": "1146787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1376591974",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 S MICHIGAN AVE",
            "address_2": "SUTIE 805",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606042402",
            "telephone_number": "312-922-3815",
            "fax_number": "312-922-3789"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 S MICHIGAN AVE",
            "address_2": "SUTIE 805",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606042402",
            "telephone_number": "312-922-3815",
            "fax_number": "312-922-3789"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "EWERT",
        "first_name": "GREG",
        "middle_name": "DONALD",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-05",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Veronica Ewart, LCSW
• Andrew Ewbank, MD
• Ewelina Beardmore Psychotherapy LLC (Soleil Psychotherapy LLC)
• Joshua Benjamin Ewen, M.D.
• Erika L Ewer, L.AC., DIPL OM
• Dolly Johnson Ewili, MD
• Barbara Ann Ewing
• Karis Ewing
• Keats Ewing, MD
• Martin Kyel Ewing, LCPC

• Internal Medicine Physician in Chicago, IL
• Providers in Chicago, 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 Jul 13, 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.