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DEBORAH S LOEFF
NPI 1770525149
Surgery - Pediatric Surgery in Chicago, IL

Active since June 12, 2006PECOS Enrolled
5841 S MARYLAND AVE, CHICAGO, IL 60637(888) 824-0200 Get Directions Write a Review

NPPES record last updated: April 3, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 3, 2025, Oct 24, 2022, May 19, 2022 and 2 more (5 updates tracked since 2022).

About Deborah S Loeff NPPES

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

DEBORAH S LOEFF (NPI 1770525149) is an individual pediatric surgery provider in Chicago, Illinois, licensed in Illinois (036075438) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Park Ridge.

NPPES Registry Identity

NPI1770525149
Entity TypeIndividualFemale
Primary Taxonomy2086S0120X
Provider Legal NameDEBORAH S LOEFF
Location Address5841 S MARYLAND AVEChicago, IL 60637-1443
Mailing Address150 Harvester Dr, Suite 300Burr Ridge, IL 60527-5919
Phone(888) 824-0200
Sole ProprietorNo
Enumeration DateJune 12, 2006
Last NPPES UpdateApril 3, 20255 updates tracked since enumeration
NPPES CertifiedApril 3, 2025
✔ NPI 1770525149 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Pediatric SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code2086S0120X
License✔ Licensed in IL · 036075438
Definition
A surgeon with expertise in the management of surgical conditions in premature and newborn infants, children and adolescents.
5841 S MARYLAND AVE, Chicago, IL 60637
Open in Google Maps ↗

Secondary Practice Location 1

Location 11675 Dempster St Fl 3Park Ridge, IL 60068-1110 · Phone (847) 318-9330 · Fax (847) 723-9441

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, 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)

Deborah S Loeff 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 Deborah Loeff reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Chicago
Same address
Multi-Specialty
5841 S MARYLAND AVE, UCPG/MC 1099
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 2,237 clinicians in this Medicare group
NPI 1821048786 (773) 702-9200

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.

DR. DON MARTINEZ M.D.
Radiology (Diagnostic Radiology)
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (773) 926-8318
ALEXANDRA DUMITRESCU
Internal Medicine
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (888) 824-0200
PELEG HOROWITZ
Neurological Surgery
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (888) 824-0200
SANDEEP GURBUXANI
Pathology (Hematology)
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (888) 824-0200
DR. NIREN GANDRA M.D.
Internal Medicine
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (773) 702-0240
ALLIE DAKROUB MD MS
Internal Medicine
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (773) 702-1000
SCOTT VASHER MD
Internal Medicine (Pulmonary Disease)
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (773) 702-1000
DR. NATHAN CHARLES NOWALK M.D.
Internal Medicine (Pulmonary Disease)
5841 S MARYLAND AVE
CHICAGO, IL 60637
Cook County (888) 824-0200

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 Deborah Loeff's NPI number?

The NPI number for Deborah Loeff is 1770525149. It was assigned to this individual provider in the NPPES registry on June 12, 2006.

Where is Deborah Loeff located?

Deborah Loeff practices at 5841 S Maryland Ave, Chicago, IL 60637. The listed phone number is (888) 824-0200.

What is Deborah Loeff's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Pediatric Surgery, with taxonomy code 2086S0120X.

Is Deborah Loeff enrolled in Medicare?

Yes. Deborah Loeff is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Deborah Loeff's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Deborah Loeff reassigns Medicare benefits to University Of Chicago (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 Deborah Loeff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Deborah Loeff accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Deborah Loeff 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 Deborah Loeff was last updated on April 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.