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

Diane Sierens, MD

Individual provider Neurological Surgery Physician · NPI 1831127802

Diane Sierens, MD is a Neurosurgery in Rockford, Illinois. Graduated from Rush Medical College of Rush University in 1994, 32 years ago. Practices with Cook County, a 787-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
32
Trained at
Rush Medical College of Rush University
Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

2350 N Rockton Ave
Rockford, IL 61103-3600
Phone: (815) 971-7600
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 305 W Jackson St Ste 100, Carbondale, IL 62901-1474 — (618) 351-4972

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence 036102651 (IL)

Record details

NPI number1831127802
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 29, 2006
Last updated in NPPESMarch 6, 2026
Certification dateMarch 6, 2026
Mailing address2350 N Rockton Ave, Rockford, IL 61103-3600

Medicare enrollment

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

Medicare specialtyNEUROSURGERY
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 1994 (32 years in practice)
Group practice Cook County — 787 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Rockford