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ANNA FENNER MD
NPI 1124768304
Anesthesiology in Chicago, IL

Active since March 29, 2022PECOS Enrolled
820 S WOOD ST STE 100, CHICAGO, IL 60612(312) 916-2933 Get Directions Write a Review

NPPES record last updated: July 30, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Anna Fenner Md NPPES

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

ANNA FENNER MD (NPI 1124768304) is an individual anesthesiology provider in Chicago, Illinois, licensed in Illinois (036179815) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS and maintains a secondary practice location in Maywood.

NPPES Registry Identity

NPI1124768304
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameANNA FENNERCredential: MD
Location Address820 S WOOD ST STE 100Chicago, IL 60612-4325
Mailing Address820 S Wood St Ste 100Chicago, IL 60612-4325 · (312) 916-2933
Phone(312) 916-2933
Sole ProprietorNo
Enumeration DateMarch 29, 2022
Last NPPES UpdateJuly 30, 2026
NPPES CertifiedJuly 30, 2026
✔ NPI 1124768304 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in IL · 036179815✔ Licensed in IL · 125.080746
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
820 S WOOD ST STE 100, Chicago, IL 60612
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Secondary Practice Location 1

Location 12160 S 1st AveMaywood, IL 60153-3328 · Phone (708) 216-9000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Anna Fenner Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Anna Fenner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Loyola University Medical Center
8.4 mi
General Practice
2160 S 1ST AVE
Maywood, IL 60153
  • Reassigned Medicare billing, Illinois enrollment
  • 1,138 clinicians in this Medicare group
NPI 1336159961 (708) 216-3215

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

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.

CAILEAN ELLIOT MCKAY MD
Student in an Organized Health Care Education/Training Program
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 996-2933
KATHERINE ELIZABETH WINEBRAKE
Student in an Organized Health Care Education/Training Program
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 996-2933
MR. RYAN WANG BS
Neurological Surgery
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 996-2933
ABHISHEK DESHPANDE MD
Orthopaedic Surgery
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 413-2048
JEFFREY CARL PETERSON MD, PHD
Ophthalmology
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 996-2933
MAY BARAKAT
Family Medicine
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 996-2933
IMARI C MCCULLOUGH
Student in an Organized Health Care Education/Training Program
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 996-2933
LIISA M BAUMANN MD
Student in an Organized Health Care Education/Training Program
820 S WOOD ST STE 100
CHICAGO, IL 60612
Cook County (312) 996-2933

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 Anna Fenner's NPI number?

The NPI number for Anna Fenner is 1124768304. It was assigned to this individual provider in the NPPES registry on March 29, 2022.

Where is Anna Fenner located?

Anna Fenner practices at 820 S Wood St Ste 100, Chicago, IL 60612. The listed phone number is (312) 916-2933.

What is Anna Fenner's specialty?

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

Is Anna Fenner enrolled in Medicare?

Yes. Anna Fenner is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Anna Fenner's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Anna Fenner reassigns Medicare benefits to Loyola University Medical Center (Maywood, IL). The 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 Anna Fenner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Anna Fenner accept?

Health plans from Oscar Health list Anna Fenner 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.

When was this NPI record last updated?

The NPPES record for Anna Fenner was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.