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DR. MARK APPLEBAUM M.D.
NPI 1033448147
Pediatrics - Pediatric Hematology-Oncology in Chicago, IL

Active since December 18, 2009PECOS EnrolledAccepts Medicare Assignment
900 E 57TH ST FL 5, CHICAGO, IL 60637(773) 702-6808 Get Directions Write a Review

NPPES record last updated: July 8, 2015. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Mark Applebaum M.d. NPPES

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

DR. MARK APPLEBAUM M.D. (NPI 1033448147) is an individual pediatric hematology-oncology provider in Chicago, Illinois, licensed in Illinois (036.129256) and active in the NPI registry since December 2009. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (2008).

NPPES Registry Identity

NPI1033448147
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameDR. MARK APPLEBAUMCredential: M.D.
Location Address900 E 57TH ST FL 5Chicago, IL 60637-1428
Mailing Address900 E 57th St Fl 5Chicago, IL 60637-1428 · (773) 702-6808
Phone(773) 702-6808
Sole ProprietorYes
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2008
Enumeration DateDecember 18, 2009
Last NPPES UpdateJuly 8, 2015
✔ NPI 1033448147 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in IL · 036.129256
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
Also ListedPediatricsTaxonomy 208000000X · License 036.129256 (IL)
900 E 57TH ST FL 5, Chicago, IL 60637
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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 and accepts Medicare assignment

Dr. Mark Applebaum M.d. 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 ID3779752795
PECOS Enrollment IDI20130801000719
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 Mark Applebaum reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Chicago
0.2 mi
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.

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 Mark Applebaum's NPI number?

The NPI number for Mark Applebaum is 1033448147. It was assigned to this individual provider in the NPPES registry on December 18, 2009.

Where is Mark Applebaum located?

Mark Applebaum practices at 900 E 57th St Fl 5, Chicago, IL 60637. The listed phone number is (773) 702-6808.

What is Mark Applebaum's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is Mark Applebaum enrolled in Medicare?

Yes. Mark Applebaum 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 organization bills Medicare for Mark Applebaum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Applebaum 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 Mark Applebaum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Applebaum accept?

Health plans from Oscar Health list Mark Applebaum 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 Mark Applebaum was last updated on July 8, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.