Thomas Edwin Klarquist, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

036100647 Issued in IL

Practice address

3134 N Clark St
Chicago, IL 60657-4414

Phone

(773) 296-5090

Fax

(312) 766-4908

NPI assigned

Apr 17, 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

Electronic endpoints 2

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

Michigan State University College of Human Medicine, 1987

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Advocate Health and Hospitals CorporationGroup PAC ID 7810800935, 3,081 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Advocate Home Health Care Serv Home health agency, Oakbrook, IL, CCN 147150
• Advocate Illinois Masonic Medical Center Hospital, Chicago, IL, CCN 140182

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 and National Provider Directory roles.

• Advocate Health and Hospitals Corporation

  • Multi-Specialty Clinic/Center
  • Oak Brook, IL
  • NPI 1700824455
  Medicare reassignment Care Compare group NPD
• Thomas Klarquist, PC

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1710103148
  NPD (past) Authorized official
• Advocate Health & Hospitals Corporation

  • Medical Specialty Clinic/Center
  • Oak Lawn, IL
  • NPI 1912936014
  NPD
• Advocate Health and Hospitals Corporation

  • Children's Hospital
  • Oak Lawn, IL
  • NPI 1508315516
  NPD
• Millennium Medical Group, LLC

  • Chiropractor
  • Chicago, IL
  • NPI 1659493849
  NPD (past)

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

• Advocate North Side Health Network

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1912014564
  Care Compare affiliation
• Ehs Home Health Care Service Inc

  • Home Health Agency
  • Oak Brook, IL
  • NPI 1598732075
  Care Compare affiliation

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

{
    "created_epoch": "1145232000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1742947200000",
    "number": "1477517373",
    "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": "3134 N CLARK ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606574414",
            "telephone_number": "773-296-5090",
            "fax_number": "312-766-4908"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1695 N Sunrise Way",
            "address_purpose": "LOCATION",
            "city": "Palm Springs",
            "state": "CA",
            "postal_code": "922623701",
            "country_code": "US",
            "telephone_number": "760-323-2118",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KLARQUIST",
        "first_name": "THOMAS",
        "middle_name": "EDWIN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-04-17",
        "last_updated": "2025-03-26",
        "certification_date": "2025-03-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036100647",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "tklarquist205991@direct.myadvocateaurora.org",
            "affiliation": "N",
            "address_1": "3134 N Clark St",
            "city": "Chicago",
            "state": "IL",
            "country_code": "US",
            "postal_code": "606574414",
            "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": "3134 N Clark St",
            "city": "Chicago",
            "state": "IL",
            "country_code": "US",
            "postal_code": "606574414",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Katarzyna Klak, PTA
• Natalie Kleeman Klapholz
• Barbara Klapinska, DDS
• Molly Kathryn Klare, MD
• Cynthia Klarman, ATC
• Daniel Klarr, MD
• Samantha Klaske
• Brian Klassen, PHD
• Klauber Complete Psychiatric Care, PLLC
• Carly Jessica Klauber, LCSW

• 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 Mar 26, 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.