Allison J Williams, MD

Primary specialty

Critical Care Medicine (Internal Medicine) PhysicianTaxonomy code 207RC0200X

License

01087598A Issued in IN

Practice address

5515 W 38TH St
Indianapolis, IN 46254-2995

Phone

(317) 880-3838

Fax

(317) 880-0081

NPI assigned

Apr 10, 2019

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 4

Addresses

Other identifiers 2

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in IN

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 MedicineAlso: Pulmonary Disease

Education

Indiana University School of Medicine, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Iu Health Medical Group LLCGroup PAC ID 9638617913, 4,382 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Indiana University Health Hospital, Indianapolis, IN, CCN 150056

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.

• The Health and Hospital Corporation of Marion County

  dba Eskenazi Health

  • Nurse Practitioner
  • Indianapolis, IN
  • NPI 1104027879

  Student in an Organized Health Care Education/Training Program

  Medicare reassignment NPD
• Iu Health Medical Group, LLC

  • General Practice Physician
  • Indianapolis, IN
  • NPI 1326893777
  Care Compare group
• The Health and Hospital Corporation of Marion County

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Indianapolis, IN
  • NPI 1871311779
  NPD

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

• Indiana University Health Inc

  dba Indiana University Health

  • General Acute Care Hospital
  • Indianapolis, IN
  • NPI 1144266024
  Care Compare affiliation

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

{
    "created_epoch": "1554854400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783987200000",
    "number": "1588127237",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "250 N SHADELAND AVE",
            "city": "INDIANAPOLIS",
            "state": "IN",
            "postal_code": "462194959"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5515 W 38TH ST",
            "city": "INDIANAPOLIS",
            "state": "IN",
            "postal_code": "462542995",
            "telephone_number": "317-880-3838",
            "fax_number": "317-880-0081"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1111 Ronald Reagan Pkwy",
            "address_purpose": "LOCATION",
            "city": "Avon",
            "state": "IN",
            "postal_code": "461237085",
            "country_code": "US",
            "telephone_number": "317-962-5820",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1120 W Michigan St # Cl630",
            "address_purpose": "LOCATION",
            "city": "Indianapolis",
            "state": "IN",
            "postal_code": "462025209",
            "country_code": "US",
            "telephone_number": "317-278-2687",
            "fax_number": "317-278-2650",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "ALLISON",
        "middle_name": "J",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2019-04-10",
        "last_updated": "2026-07-14",
        "certification_date": "2026-07-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IN",
            "license": "01087598A",
            "primary": false
        },
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "IN",
            "license": "01087598A",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RP1001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": "IN",
            "license": "01087598A",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "300026533",
            "state": "IN"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "ANTHEM PTAN",
            "identifier": "1102306127",
            "state": "IN"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "AWILLIAMS@DIRECT.IUHEALTH.ORG",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "1111 Ronald Reagan Pkwy",
            "city": "Avon",
            "state": "IN",
            "country_code": "US",
            "postal_code": "461237085",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Cheryl Willise Williams-Fields, H.F.A.
• Edna Marie Williams-Moore, L.M.T.
• Charisse Renee Williams-Thompson
• Abigayle Williams
• Adrienne R Williams
• Amanda Williams
• Amy Williams, PHARMD
• Amy E Williams, PH.D.
• Andrew James Williams, MD
• Angela Williams, LMT

• Critical Care Medicine (Internal Medicine) Physician in Indianapolis, IN
• Providers in Indianapolis, IN by specialty
• Critical Care Medicine (Internal Medicine) Physician in Indiana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 14, 2026; 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.