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

Dr. William B Weems, MD

Individual provider Anesthesiology Physician · NPI 1003856295

Dr. William B Weems, MD is an Anesthesiology in Rockford, Illinois. Graduated from University of Chicago, Pritzker School of Medicine in 1996, 30 years ago. Practices with Advocate Health and Hospitals Corporation, a 3,079-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
30
Trained at
University of Chicago, Pritzker 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

5875 E Riverside Blvd
Rockford, IL 61114-4937
Phone: (815) 398-9491
Fax: (815) 381-7498
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 1425 N Randall Rd, Elgin, IL 60123-2300 — (847) 742-9800
  • 10400 Haligus Rd, Huntley, IL 60142-9553 — (224) 654-0000
  • Centegra Memorial Medical Center, Woodstock, IL 60098 — (815) 334-3170

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 036101350 (IL)

Record details

NPI number1003856295
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 7, 2006
Last updated in NPPESJune 26, 2026
Certification dateJune 26, 2026
Mailing addressPo Box 735263, Chicago, IL 60673-5263

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 1996 (30 years in practice)
Group practice Advocate Health And Hospitals Corporation — 3079 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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