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

William R Zimmermann, MD

Individual provider Anesthesiology Physician · NPI 1356351845

William R Zimmermann, MD is an Anesthesiology in Rockford, Illinois. Qualified in 1989, 37 years ago. Practices with Anesthesia Associates, Ltd, a 36-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
37
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

8201 E Riverside Blvd
Rockford, IL 61114-2300
Phone: (815) 971-7000
Show map & directions

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

Additional practice locations (1)

  • 12935 Gregory St, Blue Island, IL 60406-2428 — (708) 824-4494

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 036089011 (IL)

Record details

NPI number1356351845
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 8, 2006
Last updated in NPPESApril 8, 2025
Certification dateApril 8, 2025
Mailing address29624 Network Pl, Chicago, IL 60673-1296

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Also practisesINTERVENTIONAL PAIN MANAGEMENT, PAIN MANAGEMENT
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Anesthesia Associates, Ltd — 36 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Other providers in Rockford