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DR. MARC ALLAN ADAJAR M.D.
NPI 1508947383
Surgery in Chicago, IL

Active since October 18, 2006PECOS Enrolled
2845 N SHERIDAN ROAD, SUITE 714, SUITE 714, CHICAGO, IL 60657(773) 561-7911 Get Directions Write a Review

NPPES record last updated: April 23, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Marc Allan Adajar M.d. NPPES

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

DR. MARC ALLAN ADAJAR M.D. (NPI 1508947383) is an individual surgery provider in Chicago, Illinois, licensed in Illinois (36114923) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1508947383
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. MARC ALLAN ADAJARCredential: M.D.
Location Address2845 N SHERIDAN ROAD, SUITE 714, SUITE 714Chicago, IL 60657-6065
Mailing Address1835 W Farragut AveChicago, IL 60640-1009 · (847) 858-6432
Phone(773) 561-7911
Sole ProprietorYes
Enumeration DateOctober 18, 2006
Last NPPES UpdateApril 23, 2020
NPPES CertifiedApril 23, 2020
✔ NPI 1508947383 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in IL · 36114923
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Also ListedSurgery · Surgical Critical CareTaxonomy 2086S0102X · License 36114923 (IL)
Also ListedSurgery · Trauma SurgeryTaxonomy 2086S0127X · License 36114923 (IL)
2845 N SHERIDAN ROAD, SUITE 714, Chicago, IL 60657
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Other Identifiers 1

MedicaidK38772IL

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Marc Allan Adajar 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 Reassignments

3

Medicare enrollment records show Marc Adajar reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Osipova Surgical Service Corporation
Same address
Surgical Oncology
331 W SURF ST STE 714
Chicago, IL 60657
  • Reassigned Medicare billing, Illinois enrollment
  • 3 clinicians in this Medicare group
NPI 1154974590 (773) 561-7911
Advocate Health And Hospitals Corp.
1.6 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
Humboldt Park Health
3.9 mi
Family Medicine
1044 N FRANCISCO AVE
Chicago, IL 60622
  • Reassigned Medicare billing, Illinois enrollment
  • 154 clinicians in this Medicare group
NPI 1740417153 (773) 292-8200

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

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
18 services12 patients

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
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
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 Marc Adajar's NPI number?

The NPI number for Marc Adajar is 1508947383. It was assigned to this individual provider in the NPPES registry on October 18, 2006.

Where is Marc Adajar located?

Marc Adajar practices at 2845 N Sheridan Road, Suite 714 Suite 714, Chicago, IL 60657. The listed phone number is (773) 561-7911.

What is Marc Adajar's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Marc Adajar enrolled in Medicare?

Yes. Marc Adajar is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marc Adajar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marc Adajar reassigns Medicare benefits to 3 organizations: Osipova Surgical Service Corporation (Chicago, IL), Advocate Health And Hospitals Corp. (Chicago, IL) and Humboldt Park Health (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 Marc Adajar'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 Marc Adajar was last updated on April 23, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.