Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Allison J Williams, MD

Individual provider Internal Medicine Physician · NPI 1588127237

Allison J Williams, MD practises Internal Medicine in Indianapolis, Indiana. Graduated from Indiana University School of Medicine in 2019, 7 years ago. Practices with Iu Health Medical Group, LLC, a 4,351-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
7
Trained at
Indiana University School of Medicine
Licensed in
IN
In the registry since
2019
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5515 W 38th St
Indianapolis, IN 46254-2995
Phone: (317) 880-3838
Fax: (317) 880-0081
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1111 Ronald Reagan Pkwy, Avon, IN 46123-7085 — (317) 962-5820
  • 1120 W Michigan St # Cl630, Indianapolis, IN 46202-5209 — (317) 278-2687

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence 01087598A (IN)
Internal Medicine Physician Taxonomy 207R00000X · Licence 01087598A (IN)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence 01087598A (IN)

Record details

NPI number1588127237
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 10, 2019
Last updated in NPPESJuly 14, 2026
Certification dateJuly 14, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesPULMONARY DISEASE
Medical schoolINDIANA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2019 (7 years in practice)
Group practice Iu Health Medical Group, Llc — 4351 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $117 7 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Iu Health Medical Group, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 4351 clinicians in the practice; 12 are shown here.

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