NPIMap

Organization Active NPI

Northwestern Memorial Hospital

  • General Acute Care Hospital
  • Chicago, IL
National Provider Identifier
1497859649
Registry record updated Jul 16, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
General Acute Care HospitalTaxonomy code 282N00000X
License
0003251 Issued in IL
Legal business name
NORTHWESTERN MEMORIAL HOSPITAL
Practice address
251 E Huron St
Chicago, IL 60611-2908
Phone
(312) 926-2000
NPI assigned
Sep 9, 2006
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jul 16, 2026

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

Authorized official

Name
Mr. John A. Orsini
Title
Vice President of Finance
Phone
(312) 926-2000

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Psychiatric Hospital Unit 273R00000X
General Acute Care Hospital 282N00000X 0003251 IL Primary

Addresses

Primary practice location

251 E Huron St
Chicago, IL 60611-2908

Mailing address

4698 Dept
Carol Stream, IL 60122-4698

Other practice location 1

675 N Saint Clair St
Chicago, IL 60611-5975
Phone (312) 926-2000

Other practice location 2

259 E Erie St
Chicago, IL 60611-2987
Phone (312) 926-2000

Other practice location 3

15300 West Ave
Orland Park, IL 60462-4600
Phone (312) 926-2000

Other identifiers 1

IdentifierTypeStateIssuer
03122MedicaidIL

Other names 1

  • Northwestern Memorial Hospital Doing business as

Electronic endpoints 1

TypeEndpointUseAffiliation
CONNECT URL https://www.cms.gov/research-statistics-data-systems/electronics-submissions-medical-documentation-esmd/cms-health-information-handler Other CMS HIH

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL2 enrollments

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
O20110516000169 IL Part A Provider - Hospital 0143217067 Practice locations: Chicago, IL; Orland Park, IL
O20170329002024 IL Part A Provider - Hospital 0143217067 Practice locations: Chicago, IL

Hospital certification: CCN 140281

Legal name
NORTHWESTERN MEMORIAL HOSPITAL
Certification status
Active
Provider type (POS)
Hospital – Short-term
Participating since
Sep 1, 1972
Last certification
Aug 2, 2018
Beds
894
Ownership / control type
Private (not for profit)
Organization structure
CorporationNon-profit
Incorporated
Sep 1, 1972 in IL
Enrollment address
251 E Huron St
Chicago, IL 60611-2908
Main/Primary Hospital Location
Hospital subgroups
Acute care

Hospital certification: CCN 78A005BP

Legal name
NORTHWESTERN MEMORIAL HOSPITAL
Doing business as
NORTHWESTERN MEMORIAL HEALTHCARE
Organization structure
Not SelectedNon-profit
Incorporated
Jan 1, 1990 in IL
Enrollment address
251 E Huron St
Chicago, IL 60611-2908
Other Hospital Practice Location
Hospital subgroups
Acute care

Facilities connected through Provider of Services related, parent or unit certification numbers.

Other NPIs with the same Medicare PAC ID 2

NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).

Care Compare: Hospital

Medicare Care Compare
Listed as
Northwestern Memorial HospitalCCN 140281
Overall star rating
5 of 5
Type
Acute Care Hospitals
Ownership
Voluntary non-profit - Private
Medicare certification status
ActiveFrom the Provider of Services file
Emergency services
Yes

National Provider Directory

National Provider Directory
Tax ID family
Northwestern Memorial Healthcare20 organizations share this tax ID, including this one
Part of
Northwestern Medicine

Other organizations with this tax ID 19

Organizations that report the same tax identification number in the National Provider Directory.

View all 19

Locations

250 E Superior St
Ste 52401
Chicago, IL 60611
Phone (312) 694-2345

441 E Ontario St
Chicago, IL 60611

160 E Huron St
Chicago, IL 60611
Phone (612) 926-2000

4445 W Irving Park Rd
Rm 410
Chicago, IL 60641

676 N Saint Clair St
Chicago, IL 60611
Phone (312) 642-9844

1333 W Belmont Ave
Fl 3
Chicago, IL 60657
Phone (312) 926-1915

Ownership & related parties

All disclosed owners & managing parties 16

As disclosed on the Medicare enrollment (CMS All Owners files). Individuals include officers, directors and managing employees, who may not hold ownership.

NameRoleSinceShare
Eric G Neilson Individual Corporate DirectorBoard Member Sep 1, 2014
Peter D Crist Individual Corporate DirectorBoard Member Apr 12, 2010
Christine Leahy Individual Corporate DirectorBoard Member Mar 19, 2022
Michael J Mullen Individual W-2 Managing EmployeeCorporate Director Jul 10, 2019
Homi B Patel Individual Corporate DirectorBoard Member Apr 12, 2010
Sean Connolly Individual Corporate DirectorBoard Member Mar 19, 2022
Charles N Mills Individual Corporate DirectorBoard Member Mar 19, 2022
William a Vanhoene Individual Corporate DirectorBoard Member Sep 1, 2014
Thomas J McAfee Individual Corporate DirectorBoard Member Sep 1, 2022
Robin a Melvin Individual Corporate DirectorBoard Member Mar 1, 2024
Eric Scheyer Individual Corporate DirectorBoard Member Mar 1, 2024
Serdar E Bulun Individual Corporate DirectorBoard Member Sep 1, 2022
John a Orsini Individual Corporate DirectorDirector/Officer Oct 20, 2014
Corporate Officer Jul 1, 2015
Operational/Managerial Control Jul 1, 2015
Natalie a Brown Individual Corporate DirectorBoard Member Sep 1, 2024
Northwestern Memorial Healthcare Organization, Chicago, IL Non-profit Operational/Managerial Control Jan 17, 2001
Charles W Hogue Individual Corporate DirectorBoard Member Sep 1, 2022

Owners & managing parties with NPI records 2

Owners and managing parties disclosed on this facility’s Medicare enrollment that are themselves Medicare-enrolled.

Facilities with the same owner 13

Facilities that share an organizational owner with 5% or greater ownership or operational control.

View all 13

Practitioners & affiliated clinicians

Affiliated clinicians 3,335

Clinicians who list this facility as an affiliation in Medicare Care Compare.

View all 3,335

NPI Registry JSON

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

{
    "created_epoch": "1157760000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1784160000000",
    "number": "1497859649",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4698 DEPT",
            "city": "CAROL STREAM",
            "state": "IL",
            "postal_code": "601224698"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "251 E HURON ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606112908",
            "telephone_number": "312-926-2000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "675 N Saint Clair St",
            "address_purpose": "LOCATION",
            "city": "Chicago",
            "state": "IL",
            "postal_code": "606115975",
            "country_code": "US",
            "telephone_number": "312-926-2000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "259 E Erie St",
            "address_purpose": "LOCATION",
            "city": "Chicago",
            "state": "IL",
            "postal_code": "606112987",
            "country_code": "US",
            "telephone_number": "312-926-2000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "15300 West Ave",
            "address_purpose": "LOCATION",
            "city": "Orland Park",
            "state": "IL",
            "postal_code": "604624600",
            "country_code": "US",
            "telephone_number": "312-926-2000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "NORTHWESTERN MEMORIAL HOSPITAL",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-09-09",
        "last_updated": "2026-07-16",
        "certification_date": "2026-07-16",
        "status": "A",
        "authorized_official_last_name": "ORSINI",
        "authorized_official_first_name": "JOHN",
        "authorized_official_middle_name": "A.",
        "authorized_official_title_or_position": "VICE PRESIDENT OF FINANCE",
        "authorized_official_telephone_number": "312-926-2000",
        "authorized_official_name_prefix": "Mr."
    },
    "taxonomies": [
        {
            "code": "273R00000X",
            "taxonomy_group": "",
            "desc": "Psychiatric Unit",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "282N00000X",
            "taxonomy_group": "",
            "desc": "General Acute Care Hospital",
            "state": "IL",
            "license": "0003251",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "03122",
            "state": "IL"
        }
    ],
    "endpoints": [
        {
            "endpointType": "CONNECT",
            "endpointTypeDescription": "CONNECT URL",
            "endpoint": "https://www.cms.gov/research-statistics-data-systems/electronics-submissions-medical-documentation-esmd/cms-health-information-handler",
            "affiliation": "Y",
            "endpointDescription": "2.16.840.1.113883.13.34.110.1.998.01",
            "affiliationName": "CMS HIH",
            "use": "OTHER",
            "useDescription": "Other",
            "useOtherDescription": "CMS esMD eMDR",
            "address_1": "7500 Security Blvd",
            "city": "Baltimore",
            "state": "MD",
            "country_code": "US",
            "postal_code": "212441849",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "organization_name": "Northwestern Memorial Hospital",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Chicago, IL

Sources for this page

Verify at the official NPI Registry.