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WARREN ALEXANDER GRUNVALD MD
NPI 1548901846
Emergency Medicine in Chicago, IL

Active since April 02, 2022PECOS EnrolledAccepts Medicare Assignment
836 W WELLINGTON AVE, CHICAGO, IL 60657(773) 296-7054(773) 296-7818 Get Directions Write a Review

NPPES record last updated: July 24, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 24, 2026, Jul 17, 2026, Apr 4, 2023 (3 updates tracked since 2023).

About Warren Alexander Grunvald Md NPPES

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

WARREN ALEXANDER GRUNVALD MD (NPI 1548901846) is an individual emergency medicine provider in Chicago, Illinois, licensed in Illinois (036178784) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS, is affiliated with University Of Illinois Hospital And Clinics, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1548901846
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameWARREN ALEXANDER GRUNVALDCredential: MD
Location Address836 W WELLINGTON AVEChicago, IL 60657-5147
Mailing Address808 S Wood StChicago, IL 60612-7300 · (312) 355-0865
Phone(773) 296-7054
Fax(773) 296-7818
Sole ProprietorNo
Medical School CMSUniversity Of Vermont College Of MedicineGraduated 2023
Enumeration DateApril 2, 2022
Last NPPES UpdateJuly 24, 20263 updates tracked since enumeration
NPPES CertifiedJuly 24, 2026
✔ NPI 1548901846 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in IL · 036178784
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
836 W WELLINGTON AVE, Chicago, IL 60657
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11740 W Taylor StChicago, IL 60612-7232 · Phone (312) 355-4000
Location 24440 W 95th StOak Lawn, IL 60453-2600 · Phone (708) 684-5375

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

Warren Alexander Grunvald 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 ID7416412531
PECOS Enrollment IDI20260720002487
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 Warren Grunvald reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Board Of Trustees Of The University Of Illinois
0.8 mi
Primary Care
3656 N HALSTED ST
Chicago, IL 60613
  • Reassigned Medicare billing, Illinois enrollment
  • 2,127 clinicians in this Medicare group
NPI 1588815401 (734) 726-4697
Advocate Health And Hospitals Corp.
0.9 mi
Cardiovascular Disease
3118 N ASHLAND AVE
Chicago, IL 60657
  • Reassigned Medicare billing, Illinois enrollment
  • 4,870 clinicians in this Medicare group
NPI 1487951711 (773) 880-9722

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

Hospital Affiliations CMS Care Compare

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

University Of Illinois Hospital And Clinics

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipGovernment - State
CMS Certification Number140150
Location1740 West Taylor St Suite 1400Chicago, IL 60612 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60657 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
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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. ROBERT R TURELLI JR. MD
Emergency Medicine
836 W WELLINGTON AVE
CHICAGO, IL 60657
Cook County (773) 296-5878
JAYME L. CAPPA
Speech-Language Pathologist
836 W WELLINGTON AVE
CHICAGO, IL 60657
Cook County (773) 296-7988
DR. CHIMUANYA OKOLI MD
Internal Medicine (Sleep Medicine)
836 W WELLINGTON AVE
CHICAGO, IL 60657
Cook County (773) 296-5424
DEBRA FARIDA
Nurse Anesthetist, Certified Registered
836 W WELLINGTON AVE
CHICAGO, IL 60657
Cook County (773) 975-1600
MALIK SAHOURI DO
Anesthesiology
836 W WELLINGTON AVE
CHICAGO, IL 60657
Cook County (773) 296-5187
SERGIO GUTIERREZ NUNEZ MD
Anesthesiology
836 W WELLINGTON AVE
CHICAGO, IL 60657
Cook County (773) 296-5187
MS. NOREEN MARIE SHERIDAN RD. LDN,CDE
Dietitian, Registered
836 W WELLINGTON AVE, FOOD AND NUTRITION DEPT.
CHICAGO, IL 60657
Cook County (773) 296-5912
ANN M HARVEY APN, CNP
Nurse Practitioner
836 W WELLINGTON AVE
CHICAGO, IL 60657
Cook County (773) 296-3646

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 Warren Grunvald's NPI number?

The NPI number for Warren Grunvald is 1548901846. It was assigned to this individual provider in the NPPES registry on April 2, 2022.

Where is Warren Grunvald located?

Warren Grunvald practices at 836 W Wellington Ave, Chicago, IL 60657. The listed phone number is (773) 296-7054.

What is Warren Grunvald's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Warren Grunvald enrolled in Medicare?

Yes. Warren Grunvald 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 Warren Grunvald's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Warren Grunvald reassigns Medicare benefits to 2 organizations: The Board Of Trustees Of The University Of Illinois (Chicago, IL) and Advocate Health And Hospitals Corp. (Chicago, 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 Warren Grunvald's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Warren Grunvald affiliated with any hospitals?

According to CMS data, Warren Grunvald is affiliated with University Of Illinois Hospital And Clinics.

When was this NPI record last updated?

The NPPES record for Warren Grunvald was last updated on July 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.