Allison J Williams, MD - Medicare Internal Medicine in Indianapolis, IN

Allison J Williams, MD is a medicare enrolled "Internal Medicine - Critical Care Medicine" physician in Indianapolis, Indiana. She went to Indiana University School Of Medicine and graduated in 2019 and has 7 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Iu Health Medical Group Llc and her current practice location is 5515 W 38th St, Indianapolis, Indiana. You can reach out to her office (for appointments etc.) via phone at (317) 880-3838.

Allison J Williams is licensed to practice in Indiana (license number 01087598A) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1588127237.

Contact Information

Allison J Williams, MD
5515 W 38th St,
Indianapolis, IN 46254-2995
(317) 880-3838
(317) 880-0081

Map and Direction




Physician's Profile

Full NameAllison J Williams
GenderFemale
SpecialityInternal Medicine
Experience7 Years
Location5515 W 38th St, Indianapolis, Indiana
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Allison J Williams attended and graduated from Indiana University School Of Medicine in 2019
  NPI Data:
  • NPI Number: 1588127237
  • Provider Enumeration Date: 04/10/2019
  • Last Update Date: 07/14/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 6507199197
  • Enrollment ID: I20220506000470

Medical Identifiers

Medical identifiers for Allison J Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1588127237NPI-NPPES
300026533MedicaidIN
1102306127OtherINANTHEM PTAN

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 01087598A (Indiana)Secondary
207RC0200XInternal Medicine - Critical Care Medicine 01087598A (Indiana)Primary
390200000XStudent In An Organized Health Care Education/training Program (* (Not Available))Secondary
207RP1001XInternal Medicine - Pulmonary Disease 01087598A (Indiana)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Indiana University HealthIndianapolis, INHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Iu Health Medical Group Llc96386179134382

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Allison J Williams allows following entities to bill medicare on her behalf.
Entity NameThe Health and Hospital Corporation of Marion County
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1104027879
PECOS PAC ID: 6709795974
Enrollment ID: O20041229000426

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Allison J Williams is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Allison J Williams, MD
250 N Shadeland Ave,
Indianapolis, IN 46219-4959

Ph: Not Available
Allison J Williams, MD
5515 W 38th St,
Indianapolis, IN 46254-2995

Ph: (317) 880-3838

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.