Gerald Jay Osher, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

036066116 Issued in IL

Practice address

2101 Waukegan Rd Ste 200
Bannockburn, IL 60015-1800

Phone

(847) 317-1717

Fax

(847) 317-9305

NPI assigned

Aug 4, 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

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 Michigan Medical School, 1980

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Brent M Nathan MD PLLCGroup PAC ID 2365942885, 5 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Guardian Home Health Care, LLC Home health agency, Northfield, IL, CCN 147785
• Vitas Healthcare Corporation of Illinois Hospice, Lombard, IL, CCN 141514
• Northshore University Healthsystem - Evanston Hospital Hospital, Evanston, IL, CCN 140010
• Northwestern Lake Forest Hospital Hospital, Lake Forest, IL, CCN 140130
• Northwestern Memorial Hospital Hospital, Chicago, IL, CCN 140281
• Lake Forest Place Nursing home, Lake Forest, IL, CCN 145986

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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.

• Brent M Nathan MD PLLC

  • Internal Medicine Physician
  • Bannockburn, IL
  • NPI 1831083088
  Medicare reassignment Care Compare group NPD

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

• Endeavor Health Clinical Operations

  • General Acute Care Hospital
  • Evanston, IL
  • NPI 1184670549
  Care Compare affiliation
• Guardian Home Health Care LLC

  • Home Health Agency
  • Northfield, IL
  • NPI 1366439655
  Care Compare affiliation
• Lake Forest Place, LLC

  • Skilled Nursing Facility
  • Lake Forest, IL
  • NPI 1336504117

  Nursing home

  Care Compare affiliation
• Northwestern 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
• Vitas Healthcare Corporation of Illinois

  • Community Based Hospice Care Agency
  • Lombard, IL
  • NPI 1497895569
  Care Compare affiliation

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

{
    "created_epoch": "1154649600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766102400000",
    "number": "1326056136",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2101 WAUKEGAN RD STE 200",
            "city": "BANNOCKBURN",
            "state": "IL",
            "postal_code": "600151800",
            "telephone_number": "847-710-1246",
            "fax_number": "847-317-9305"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2101 WAUKEGAN RD STE 200",
            "city": "BANNOCKBURN",
            "state": "IL",
            "postal_code": "600151800",
            "telephone_number": "847-317-1717",
            "fax_number": "847-317-9305"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OSHER",
        "first_name": "GERALD",
        "middle_name": "JAY",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-08-04",
        "last_updated": "2025-12-19",
        "certification_date": "2025-12-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036066116",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Paul Edward Nevin, PSY.D.
• Adam J. Nikkel, MS, OTR/L
• North Shore Cardiologists SC
• Carl A Nottoli, DC
• Offices of Richard S. Rock M D
• Elizabeth Parent, MS, RD, LDN
• Kaitlyn M Pasquinelli, DPT, PT
• Perlman Davis and Associates in Psychology
• Barbara N Perlman, PHD
• Gary R Pineless, MD

• Internal Medicine Physician in Bannockburn, IL
• Providers in Bannockburn, 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 Dec 19, 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.
• 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.