NPIMap

Individual provider Active NPI

William Whittier, MD

  • Nephrology Physician
  • Chicago, IL
National Provider Identifier
1609981471
Registry record updated Apr 29, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nephrology PhysicianTaxonomy code 207RN0300X
License
036104632 Issued in IL
Practice address
104 S Ashland Ave
Chicago, IL 60607-2402
Phone
(312) 850-8434
Fax
(312) 850-8431
NPI assigned
Aug 20, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 29, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Nephrology Physician 207RN0300X 036104632 IL Primary

Addresses

Primary practice location

104 S Ashland Ave
Chicago, IL 60607-2402

Mailing address

120 W 22ND St Ste 200
Oak Brook, IL 60523-1563
Phone (630) 575-5000

Other identifiers 3

IdentifierTypeStateIssuer
0316104632MedicaidIL
01615381OtherBC/BS NUMBER
P00071833OtherRR MEDICARE

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address credentialing@nephdocs.com Direct

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20101117001297 IL Practitioner - Nephrology 5991991887 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Nephrology
Education
Northeastern Ohio University College of Medicine, 1998
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Edmund J Lewis MD and AssociatesGroup PAC ID 6305860586, 5 clinicians

Practice addresses (Care Compare)

104 S Ashland Ave
Chicago, IL 60607-2402
Phone (312) 850-8434

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
036104632ILMDNephrology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
SRS-Chicago Circle, LLC PastSince Dec 1, 2024 Accepting new patients
Edmund J Lewis Specialist PastSince Nov 9, 2021 Accepting new patients
Nephrology Associates of Northern Illinois, LTD. Nephrology PastSince Jul 1, 2003 Accepting new patients

Interoperability endpoints

  • Direct secure messaging: wwhittier5914@direct.rush.rush-health.com
  • Direct secure messaging: wwhittier74679@direct.acumenmd.com

Organizations & group practices 4

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.

Hospital & facility affiliations 6

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

NPI Registry JSON

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

{
    "created_epoch": "1156032000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1745884800000",
    "number": "1609981471",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "120 W 22ND ST STE 200",
            "city": "OAK BROOK",
            "state": "IL",
            "postal_code": "605231563",
            "telephone_number": "630-575-5000",
            "fax_number": "312-850-8431"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "104 S ASHLAND AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606072402",
            "telephone_number": "312-850-8434",
            "fax_number": "312-850-8431"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WHITTIER",
        "first_name": "WILLIAM",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-20",
        "last_updated": "2025-04-29",
        "certification_date": "2025-04-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RN0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Nephrology",
            "state": "IL",
            "license": "036104632",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0316104632",
            "state": "IL"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BC/BS NUMBER",
            "identifier": "01615381",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RR MEDICARE",
            "identifier": "P00071833",
            "state": null
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "credentialing@nephdocs.com",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "120 W 22nd St Ste 200",
            "city": "Oak Brook",
            "state": "IL",
            "country_code": "US",
            "postal_code": "605231563",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Chicago, IL

Sources for this page

Verify at the official NPI Registry.