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NORTHWESTERN SURGICAL ASSOCIATES
NPI 1225076706
Surgery in Chicago, IL

Active since June 04, 2006
676 N SAINT CLAIR ST, STE 1525, CHICAGO, IL 60611(312) 943-5427(312) 266-0478 Get Directions Write a Review

NPPES record last updated: October 1, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Northwestern Surgical Associates NPPES

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

NORTHWESTERN SURGICAL ASSOCIATES (NPI 1225076706) is a healthcare organization registered as a surgery in Chicago, Illinois and active in the NPI registry since June 2006. The organization lists Steven J Stryker, Partner, as its authorized official.

NPPES Registry Identity

NPI1225076706
Entity TypeOrganization
Primary Taxonomy208600000X
Legal Business NameNORTHWESTERN SURGICAL ASSOCIATES
Location Address676 N SAINT CLAIR ST, STE 1525Chicago, IL 60611-2927
Mailing AddressPo Box 421Winnetka, IL 60093-0421 · (847) 770-6043
Phone(312) 943-5427
Fax(312) 266-0478
Organization SubpartNo
Authorized OfficialSteven J StrykerPartner · (312) 943-5427
Enumeration DateJune 4, 2006
Last NPPES UpdateOctober 1, 2013
✔ NPI 1225076706 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
676 N SAINT CLAIR ST, Chicago, IL 60611
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Other Identifiers 2

Medicare ID-Type Unspecified425230IL
Other0001621690IL · Blue Shield

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Northwestern Surgical Associates is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Northwestern Surgical Associates, which bills Medicare for the services they deliver. Of these, 1 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (4)

Jeffrey Fronza, MD
General Surgery
NPI 1265695258
7 BLANCHARD CIR STE 104
Wheaton, IL 60189
(630) 668-0833
✔ PECOS✔ Accepts Medicare6.2 mi
Kathryn Weber, MD
Colorectal Surgery (Proctology)
NPI 1265775274
2050 PFINGSTEN RD STE 128
Glenview, IL 60026
(847) 570-1700
✔ PECOS✔ Accepts Medicare18 mi
Daniel Davila, M.D.
General Surgery
NPI 1558637124
800 N WESTMORELAND RD STE 100
Lake Forest, IL 60045
(847) 234-4310
✔ PECOS✔ Accepts Medicare26 mi
Wilson Hartz, M.D.
General Surgery
NPI 1225084031
676 N SAINT CLAIR ST STE 1525
Chicago, IL 60611
(312) 951-5640
✔ PECOS27 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Northwestern Surgical Associates's NPI number?

The NPI number for Northwestern Surgical Associates is 1225076706. It was assigned to this organization in the NPPES registry on June 4, 2006.

Where is Northwestern Surgical Associates located?

Northwestern Surgical Associates is located at 676 N Saint Clair St Ste 1525, Chicago, IL 60611. The listed phone number is (312) 943-5427.

What is Northwestern Surgical Associates's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Northwestern Surgical Associates enrolled in Medicare?

Yes. Northwestern Surgical Associates is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Northwestern Surgical Associates?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians in 2 Medicare specialties reassign their Medicare billing to Northwestern Surgical Associates. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are General Surgery (3) and Colorectal Surgery (Proctology) (1). Of these, 1 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Northwestern Surgical Associates was last updated on October 1, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.