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NATALIE SIMAK MD
NPI 1306208228
Anesthesiology in Chicago, IL

Active since March 22, 2016PECOS EnrolledAccepts Medicare Assignment
8420 W BRYN MAWR AVE STE 300, CHICAGO, IL 60631(773) 756-5780 Get Directions Write a Review

NPPES record last updated: June 13, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 13, 2024, Sep 6, 2023, Jul 12, 2020 and 1 more (4 updates tracked since 2016).

About Natalie Simak Md NPPES

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

NATALIE SIMAK MD (NPI 1306208228) is an individual anesthesiology provider in Chicago, Illinois, licensed in Illinois (125.068622) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1306208228
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameNATALIE SIMAKCredential: MD
Location Address8420 W BRYN MAWR AVE STE 300Chicago, IL 60631-3436
Mailing Address8420 W Bryn Mawr Ave Ste 300Chicago, IL 60631-3436 · (773) 756-5780
Phone(773) 756-5780
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateMarch 22, 2016
Last NPPES UpdateJune 13, 20244 updates tracked since enumeration
NPPES CertifiedJune 13, 2024
✔ NPI 1306208228 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in IL · 125.068622
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
8420 W BRYN MAWR AVE STE 300, Chicago, IL 60631
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Natalie Simak Md 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 ID5890072417
PECOS Enrollment IDI20201113002690
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Natalie Simak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Midwest Anesthesia Partners, LLC
11 mi
Anesthesiology
2900 N LAKE SHORE DR
Chicago, IL 60657
  • Reassigned Medicare billing, Illinois enrollment
  • 385 clinicians in this Medicare group
NPI 1255380184 (773) 388-5700
Anesthesia Associates, Ltd
25 mi
Pain Medicine
2540 HANFORD LN
Aurora, IL 60502
  • Reassigned Medicare billing, Illinois enrollment
  • 101 clinicians in this Medicare group
NPI 1952308223 (815) 748-8993

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

Areas of Expertise CMS Part B claims 3

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.

Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
44 services44 patients
Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
20 services20 patients
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
11 services11 patients

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.

DR. KAREN CAMPBELL SPACCARELLI M.D.
Anesthesiology
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (708) 831-8282
KATHLEEN OLSEN CRNA
Nurse Anesthetist, Certified Registered
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (773) 756-5780
DR. SARAH OSWALD
Anesthesiology
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (773) 355-5300
MUHAMMAD KHAWARI MD
Anesthesiology
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (773) 355-5300
DR. JITEN JAYANTILAL PATEL M.D.
Anesthesiology
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (773) 355-5300
DR. RAHUL REDDY M.D.
Anesthesiology
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (219) 613-9016
DR. NEELAM TRIVEDI ROZANSKI DO
Anesthesiology
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (773) 355-5300
TAMILA GRANT MD
Anesthesiology
8420 W BRYN MAWR AVE STE 300
CHICAGO, IL 60631
Cook County (312) 933-4014

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 Natalie Simak's NPI number?

The NPI number for Natalie Simak is 1306208228. It was assigned to this individual provider in the NPPES registry on March 22, 2016.

Where is Natalie Simak located?

Natalie Simak practices at 8420 W Bryn Mawr Ave Ste 300, Chicago, IL 60631. The listed phone number is (773) 756-5780.

What is Natalie Simak's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Natalie Simak enrolled in Medicare?

Yes. Natalie Simak 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.

Which organizations bill Medicare for Natalie Simak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Natalie Simak reassigns Medicare benefits to 2 organizations: Midwest Anesthesia Partners, LLC (Chicago, IL) and Anesthesia Associates, Ltd (Aurora, IL). Each 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 Natalie Simak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Natalie Simak was last updated on June 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.