NPIMap

Individual provider Active NPI

Umar Kamal Siddiqui, MD

  • Internal Medicine Physician
  • Appleton, WI
National Provider Identifier
1578055984
Registry record updated Sep 10, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
85874 Issued in WI
Practice address
2500 E Capitol Dr
Appleton, WI 54911-8735
Phone
(920) 731-5811
Fax
(920) 358-1185
NPI assigned
May 31, 2018
Last updated
Sep 10, 2026By the provider in NPPES
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Sep 10, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 85874 WI Primary
Addiction Medicine (Internal Medicine) Physician 207RA0401X 036157315 IL
Addiction Medicine (Internal Medicine) Physician 207RA0401X 72173 MN

Addresses

Primary practice location

2500 E Capitol Dr
Appleton, WI 54911-8735

Mailing address

3 Neenah Ctr
Neenah, WI 54956-3070
Phone (920) 830-5900

Other practice location 1

1001 E Superior St Ste 401
Duluth, MN 55802-2229
Phone (218) 249-5555

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address him@slk.direct.slhduluth.com

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL, MN2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20210723001383 IL Practitioner - HospitalistPractitioner - Internal Medicine 9638572902 Reassigns benefits to 3 organizations
I20220919002666 MN Practitioner - Internal MedicinePractitioner - Addiction Medicine 9638572902 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Internal MedicineAlso: Addiction Medicine
Education
Other, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
St. Luke's Hospital of DuluthGroup PAC ID 7113834839, 409 clinicians

Practice addresses (Care Compare)

1001 E Superior St
Suite 401
Duluth, MN 55802-2229
Phone (218) 249-7960

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
72173MNMDAddiction Medicine (Internal Medicine) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
St. Luke's Hospital of Duluth CurrentSince Aug 29, 2022 Accepting new patients
Rush University Medical Group Internal Medicine CurrentSince Dec 13, 2021 Accepting new patients
PCC Community Wellness Center CurrentSince Jul 15, 2021 Accepting new patients
St. Luke's Hospital of Duluth CurrentSince Aug 29, 2022 Accepting new patients
Cimpar, S.C. Internal Medicine CurrentSince Aug 14, 2021 Accepting new patients
PCC Community Wellness Center CurrentSince Jul 15, 2021 Accepting new patients
St. Luke's Hospital of Duluth Current Accepting new patients
St. Luke's Hospital of Duluth Past Accepting new patients
St. Luke's Hospital of Duluth Past Accepting new patients

Locations

1620 W Harrison St
Chicago, IL 60612
Phone (312) 942-4200

1700 W Van Buren St
#500
Chicago, IL 60612
Phone (312) 563-2875

29980 Network Pl
Chicago, IL 60673

75 Remittance Dr
Dept 1611
Chicago, IL 60675

101 Madison St
Ste 300
Oak Park, IL 60302
Phone (773) 849-9406

14 Lake St
Oak Park, IL 60302
Phone (708) 383-0113

3 Erie Ct
#1300
Oak Park, IL 60302
Phone (708) 406-3929

3 Erie Ct
Ste 1300
Oak Park, IL 60302
Phone (708) 383-9786

1001 E Superior St
Ste 401
Duluth, MN 55802
Phone (218) 249-7960

1015 E 1st St
Duluth, MN 55805
Phone (218) 249-7860

915 E 1st St
Duluth, MN 55805
Phone (218) 249-5352

Interoperability endpoints

  • Direct secure messaging: him@slk.direct.slhduluth.com
  • Direct secure messaging: usiddiqui237578@direct.aspirus.org

Organizations & group practices 9

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.

Hospital & facility affiliations 34

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

View all 34

NPI Registry JSON

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

{
    "created_epoch": "1527724800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788998400000",
    "number": "1578055984",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3 NEENAH CTR",
            "city": "NEENAH",
            "state": "WI",
            "postal_code": "549563070",
            "telephone_number": "920-830-5900"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2500 E CAPITOL DR",
            "city": "APPLETON",
            "state": "WI",
            "postal_code": "549118735",
            "telephone_number": "920-731-5811",
            "fax_number": "920-358-1185"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1001 E Superior St Ste 401",
            "address_purpose": "LOCATION",
            "city": "Duluth",
            "state": "MN",
            "postal_code": "558022229",
            "country_code": "US",
            "telephone_number": "218-249-5555",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIDDIQUI",
        "first_name": "UMAR",
        "middle_name": "KAMAL",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2018-05-31",
        "last_updated": "2026-09-10",
        "certification_date": "2026-09-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WI",
            "license": "85874",
            "primary": true
        },
        {
            "code": "207RA0401X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Addiction Medicine",
            "state": "IL",
            "license": "036157315",
            "primary": false
        },
        {
            "code": "207RA0401X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Addiction Medicine",
            "state": "MN",
            "license": "72173",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "him@slk.direct.slhduluth.com",
            "affiliation": "N",
            "address_1": "1001 E Superior St Ste 401",
            "city": "Duluth",
            "state": "MN",
            "country_code": "US",
            "postal_code": "558022229",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Appleton, WI

Sources for this page

Verify at the official NPI Registry.