Diane SierensM.D.
Neurosurgery·Rockford, IL
Diane Sierens, M.D. is a Neurosurgery provider in Rockford, IL, as of July 2026.
- NPI1831127802
- Registered2006
- Class of1994
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Diane Sierens at a glance
- Provider
- Diane Sierens
- Credential
- M.D.
- Specialty
- Neurosurgery
- Procedures
- Neurosurgery CPT codes
- Location
- Rockford, IL
- Medical school
- Rush Medical College of Rush University
- Graduated
- 1994
- NPI registered
- 2006
- NPI
- 1831127802
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does Diane Sierens practice?
Diane Sierens, M.D. is based in Rockford, IL. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Diane Sierens's NPI number?
Diane Sierens's National Provider Identifier (NPI) is 1831127802, registered in 2006. Specialty on record: Neurosurgery; credential M.D.
Where did Diane Sierens go to medical school?
Diane Sierens, M.D. attended Rush Medical College of Rush University, graduating in 1994.
How many Neurosurgery providers in Illinois work at ambulatory surgery centers?
30 Neurosurgery surgeons and proceduralists in Illinois are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Diane Sierens among them. The Illinois Neurosurgery directory lists each one by city with credential, NPI, and center affiliations.
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