Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Allen D Williams, MD

Individual provider Internal Medicine Physician · NPI 1073601324

Allen D Williams, MD is an Internal Medicine in Rockford, Illinois. Graduated from Loyola University of Chicago, Stritch School of Medicine in 1998, 28 years ago. Practices with Swedishamerican Hospital, a 387-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
28
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
IL
In the registry since
2006
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

3505 N Bell School Rd
Rockford, IL 61114
Phone: (779) 696-0300
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036103011 (IL)

Record details

NPI number1073601324
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 11, 2006
Last updated in NPPESFebruary 18, 2021
Certification dateFebruary 18, 2021
Mailing addressPo Box 78866, Milwaukee, WI 53278-8866

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 1998 (28 years in practice)
Group practice Swedishamerican Hospital — 387 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 on file with Medicare

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