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DR. GARTH NYAMBI WALKER M.D.
NPI 1891143152
Emergency Medicine in Chicago, IL

Active since May 27, 2016PECOS Enrolled
5841 S. MARYLAND AVENUE MC5068, CHICAGO, IL 60637(773) 702-3135 Get Directions Write a Review

NPPES record last updated: May 27, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Garth Nyambi Walker M.d. NPPES

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

DR. GARTH NYAMBI WALKER M.D. (NPI 1891143152) is an individual emergency medicine provider in Chicago, Illinois, licensed in Illinois (125068011) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891143152
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. GARTH NYAMBI WALKERCredential: M.D.
Location Address5841 S. MARYLAND AVENUE MC5068Chicago, IL 60637
Mailing Address180 Harvester Drive, Suite 110, Burr Ridge, IlChicago, IL 60527 · (773) 702-1150
Phone(773) 702-3135
Sole ProprietorNo
Enumeration DateMay 27, 2016
✔ NPI 1891143152 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 · 125068011
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.
5841 S. MARYLAND AVENUE MC5068, Chicago, IL 60637
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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 (PECOS)

Dr. Garth Nyambi Walker M.d. 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 Garth Walker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Rush University Medical Center
5.3 mi
Internal Medicine
1411 S MICHIGAN AVE
Chicago, IL 60605
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Rush University Medical Group
  • 2,169 clinicians in this Medicare group
NPI 1689165540 (312) 563-0654

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60637 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.

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 Garth Walker's NPI number?

The NPI number for Garth Walker is 1891143152. It was assigned to this individual provider in the NPPES registry on May 27, 2016.

Where is Garth Walker located?

Garth Walker practices at 5841 S. Maryland Avenue Mc5068, Chicago, IL 60637. The listed phone number is (773) 702-3135.

What is Garth Walker's specialty?

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

Is Garth Walker enrolled in Medicare?

Yes. Garth Walker is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Garth Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Garth Walker reassigns Medicare benefits to Rush University Medical Center (Chicago, 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 Garth Walker'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 Garth Walker was last updated on May 27, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.