Isaac Thomas, MD

Primary specialty

Cardiovascular Disease PhysicianTaxonomy code 207RC0000X

License

13522 Issued in WI

Practice address

222 S Greenleaf St Ste 109
Gurnee, IL 60031-5705

Phone

(847) 336-1600

Fax

(847) 336-2380

NPI assigned

May 4, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Other identifiers 3

Medicare fee-for-service enrollment

Enrolled in IL, WI2 enrollments

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 2

Specialty

Cardiovascular Disease (Cardiology)

Education

Other, 1979

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Froedtert South IncGroup PAC ID 9537071196, 158 clinicians

Thomas and Thomas Medical LTDGroup PAC ID 0648218412, 2 clinicians

City of Hope Medical Group of Illinois PLLCGroup PAC ID 3274446596, 129 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Advocate Condell Medical Center Hospital, Libertyville, IL, CCN 140202
• Midwestern Region Med Center, Inc Hospital, Zion, IL, CCN 140100
• Froedtert South Inc. Hospital, Kenosha, WI, CCN 520021

Merit-based Incentive Payment System (MIPS)

Final score

87.76 of 100Reported as group

Quality

61.21

Improvement activities

40

Cost

84.02

Merit-based Incentive Payment System (MIPS)

Final score

86.5 of 100Reported as group

Quality

74.24

Promoting interoperability

100

Improvement activities

40

Cost

66.56

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: ithomas144531@cityofhope.direct-ci.com

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.

• City of Hope Medical Group of Illinois PLLC

  • Specialist
  • Zion, IL
  • NPI 1548258072
  Medicare reassignment Care Compare group NPD
• Thomas and Thomas Medical LTD

  • Specialist
  • Gurnee, IL
  • NPI 1427090125
  Medicare reassignment Care Compare group NPD
• Froedtert South, Inc.

  • Family Medicine Physician
  • Kenosha, WI
  • NPI 1558305284
  Medicare reassignment Care Compare group NPD (past)
• Cardiac Imaging Inc

  • Mobile Radiology Clinic/Center
  • Oak Brook Terrace, IL
  • NPI 1770830606
  NPD

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

• Advocate Condell Medical Center

  • Mobile Mammography Clinic/Center
  • Gurnee, IL
  • NPI 1023262441

  Hospital

  Care Compare affiliation
• Advocate Condell Medical Center

  • General Acute Care Hospital
  • Libertyville, IL
  • NPI 1124272547
  Care Compare affiliation
• Advocate Condell Medical Center

  • Mobile Mammography Clinic/Center
  • Grayslake, IL
  • NPI 1770737199

  Hospital

  Care Compare affiliation
• Midwestern Regional Medical Center, Inc.

  • General Acute Care Hospital
  • Zion, IL
  • NPI 1811984388
  Care Compare affiliation
• Froedtert South, Inc.

  • General Acute Care Hospital
  • Pleasant Prairie, WI
  • NPI 1003831132
  Care Compare affiliation

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

{
    "created_epoch": "1146700800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778198400000",
    "number": "1083662894",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3915 OGLESBY AVE",
            "city": "GURNEE",
            "state": "IL",
            "postal_code": "600313358",
            "telephone_number": "847-336-1600",
            "fax_number": "847-336-2380"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "222 S GREENLEAF ST STE 109",
            "city": "GURNEE",
            "state": "IL",
            "postal_code": "600315705",
            "telephone_number": "847-336-1600",
            "fax_number": "847-336-2380"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "10256 Old Green Bay Rd",
            "address_purpose": "LOCATION",
            "city": "Pleasant Prairie",
            "state": "WI",
            "postal_code": "531582814",
            "country_code": "US",
            "telephone_number": "847-336-1600",
            "fax_number": "847-336-2380",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "THOMAS",
        "first_name": "ISAAC",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-04",
        "last_updated": "2026-05-08",
        "certification_date": "2026-05-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "IL",
            "license": "036.063274",
            "primary": false
        },
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "WI",
            "license": "13522",
            "primary": true
        },
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "IL",
            "license": "036063274",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "036063274",
            "state": "IL"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "100268582",
            "state": "WI"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "763284",
            "state": "IL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Susan Frances Thiel, PT
• Catherine L Thiry, MS, CCC-SLP
• Thomas and Thomas Medical LTD
• Thomas K. & Cheryl a. Stewart, DDS, LTD.
• Amy O'Brian Thomas, M.D.
• Jaya Thomas, MD
• Lashawn C Thomas
• Praveena Ann Thomas, PA-C
• Lisa S Thompson, M.D.
• Lynda Throm

• Cardiovascular Disease Physician in Gurnee, IL
• Providers in Gurnee, IL by specialty
• Cardiovascular Disease Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 8, 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.