Individual provider Active NPI

Nathan Patrick Horvat, MD

  • Critical Care Medicine (Internal Medicine) Physician
  • Chicago, IL
National Provider Identifier
1407558877
Registry record updated May 7, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Critical Care Medicine (Internal Medicine) PhysicianTaxonomy code 207RC0200X
License
036.179732 Issued in IL
Practice address
600 S Paulina St Ste 403
Chicago, IL 60612-3806
Phone
(312) 942-5000
NPI assigned
Mar 20, 2023
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 7, 2026

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

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 125.082224 IL
Critical Care Medicine (Internal Medicine) Physician 207RC0200X 036.179732 IL Primary
Pulmonary Disease Physician 207RP1001X 036.179732 IL
Student in an Organized Health Care Education/Training Program 390200000X

Addresses

Primary practice location

600 S Paulina St Ste 403
Chicago, IL 60612-3806

Mailing address

600 S Paulina St Ste 403
Chicago, IL 60612-3806

Other practice location 1

2160 S 1st Ave
Maywood, IL 60153-3328
Phone (888) 584-7888

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20230801000723 IL Order and Referring Only - Internal MedicinePractitioner - Internal Medicine 5799146205

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
125.082224ILMDInternal Medicine Physician
036.179732ILMDCritical Care Medicine (Internal Medicine) Physician

NPI Registry JSON

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

{
    "created_epoch": "1679270400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778112000000",
    "number": "1407558877",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "600 S PAULINA ST STE 403",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606123806"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 S PAULINA ST STE 403",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606123806",
            "telephone_number": "312-942-5000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2160 S 1st Ave",
            "address_purpose": "LOCATION",
            "city": "Maywood",
            "state": "IL",
            "postal_code": "601533328",
            "country_code": "US",
            "telephone_number": "888-584-7888",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HORVAT",
        "first_name": "NATHAN",
        "middle_name": "PATRICK",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-03-20",
        "last_updated": "2026-05-07",
        "certification_date": "2026-05-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "125.082224",
            "primary": false
        },
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "IL",
            "license": "036.179732",
            "primary": true
        },
        {
            "code": "207RP1001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": "IL",
            "license": "036.179732",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Chicago, IL

Sources for this page

Verify at the official NPI Registry.