DIANE SIERENS M.D.
NPI 1831127802
Neurological Surgery in Rockford, IL

Active since June 29, 2006PECOS EnrolledAccepts Medicare Assignment
84.57/100
CMS Quality Rating
2350 N ROCKTON AVE, ROCKFORD, IL 61103(815) 971-7600 Get Directions Write a Review

NPPES record last updated: March 6, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Mar 6, 2026, Apr 30, 2021 (2 updates tracked since 2021).

About Diane Sierens M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DIANE SIERENS M.D. (NPI 1831127802) is an individual neurological surgery provider in Rockford, Illinois, licensed in Illinois (036102651) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with John H Stroger Jr Hospital, and maintains a secondary practice location in Carbondale.

NPPES Registry Identity

NPI1831127802
Entity TypeIndividualFemale
Primary Taxonomy207T00000X
Provider Legal NameDIANE SIERENSCredential: M.D.
Location Address2350 N ROCKTON AVERockford, IL 61103-3600
Mailing Address2350 N Rockton AveRockford, IL 61103-3600 · (815) 971-7600
Sole ProprietorNo
Medical School CMSRush Medical College Of Rush UniversityGraduated 1994
Enumeration DateJune 29, 2006
Last NPPES UpdateMarch 6, 20262 updates tracked since enumeration
NPPES CertifiedMarch 6, 2026
NPI 1831127802 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
License Licensed in IL · 036102651
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
2350 N ROCKTON AVE, Rockford, IL 61103

Secondary Practice Location 1

Location 1305 W Jackson St Ste 100Carbondale, IL 62901-1474 · Phone (618) 351-4972 · Fax (618) 351-4973

Other Identifiers 1

Other036102651IL · State License

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Diane Sierens M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2062481294
PECOS Enrollment IDI20040924001021
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
13 services13 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

John H Stroger Jr Hospital

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number140124
Location1901 W Harrison StChicago, IL 60612 · Cook County
Emergency services Birthing friendly

Memorial Hospital Of Carbondale

Acute Care Hospitals · Carbondale, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140164
Location405 W JacksonCarbondale, IL 62901 · Jackson County
Emergency services Birthing friendly

Franciscan Health Olympia & Chicago Heights

Acute Care Hospitals · Olympia Fields, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140172
Location20201 S Crawford AvenueOlympia Fields, IL 60461 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 61103 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$127.46 typical visit price
range $54.80 – $168.44
Typical copayment $31.86 (range $13.70 – $42.11)
Most-billed visit code 99204
Established Patient
$68.64 typical visit price
range $17.16 – $136.56
Typical copayment $17.16 (range $4.29 – $34.14)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

84.57/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality60.25
Promoting Interoperability100
Improvement Activities40
Cost67

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine (Cardiovascular Disease)
2350 N ROCKTON AVE
ROCKFORD, IL 61103
Internal Medicine
2350 N ROCKTON AVE
ROCKFORD, IL 61103
Psychiatry & Neurology (Neurology)
2350 N ROCKTON AVE, ROCKFORD HEALTH PHYSICIANS
ROCKFORD, IL 61103
Thoracic Surgery (Cardiothoracic Vascular Surgery)
2350 N ROCKTON AVE, RMB 1ST FLOOR
ROCKFORD, IL 61103
Nurse Practitioner (Adult Health)
2350 N ROCKTON AVE
ROCKFORD, IL 61103
Internal Medicine (Cardiovascular Disease)
2350 N ROCKTON AVE
ROCKFORD, IL 61103
Nurse Practitioner (Gerontology)
2350 N ROCKTON AVE
ROCKFORD, IL 61103
Nurse Practitioner
2350 N ROCKTON AVE
ROCKFORD, IL 61103

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Diane Sierens's NPI number?

The NPI number for Diane Sierens is 1831127802. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Where is Diane Sierens located?

Diane Sierens practices at 2350 N Rockton Ave, Rockford, IL 61103. The listed phone number is (815) 971-7600.

What is Diane Sierens's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Diane Sierens enrolled in Medicare?

Yes. Diane Sierens is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Diane Sierens accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Diane Sierens as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Diane Sierens affiliated with any hospitals?

According to CMS data, Diane Sierens is affiliated with John H Stroger Jr Hospital, Memorial Hospital Of Carbondale and Franciscan Health Olympia & Chicago Heights.

When was this NPI record last updated?

The NPPES record for Diane Sierens was last updated on March 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.