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DR. MARTHA COTSEN SAKER MD
NPI 1790779734
Radiology - Diagnostic Radiology in Chicago, IL

Active since September 06, 2005PECOS Enrolled
225 E CHICAGO AVE, CHICAGO, IL 60611(312) 227-4500(312) 227-9785 Get Directions Write a Review

NPPES record last updated: May 22, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 6, 2019, Oct 31, 2019 (2 updates tracked since 2019).

About Dr. Martha Cotsen Saker Md NPPES

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

DR. MARTHA COTSEN SAKER MD (NPI 1790779734) is an individual diagnostic radiology provider in Chicago, Illinois, licensed in Illinois (036-090389) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS and maintains a secondary practice location in Oak Lawn.

NPPES Registry Identity

NPI1790779734
Entity TypeIndividualFemale
Primary Taxonomy2085R0202X
Provider Legal NameDR. MARTHA COTSEN SAKERCredential: MD
Location Address225 E CHICAGO AVEChicago, IL 60611-2991
Mailing Address225 E Chicago AveChicago, IL 60611-2991 · (312) 227-4000 · Fax (312) 227-9782
Phone(312) 227-4500
Fax(312) 227-9785
Sole ProprietorNo
Enumeration DateSeptember 6, 2005
Last NPPES UpdateMay 22, 20242 updates tracked since enumeration
NPPES CertifiedMay 22, 2024
✔ NPI 1790779734 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in IL · 036-090389
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Also ListedRadiology · Pediatric RadiologyTaxonomy 2085P0229X · License 036-090389 (IL)
225 E CHICAGO AVE, Chicago, IL 60611
Open in Google Maps ↗

Secondary Practice Location 1

Location 14440 W 95th StOak Lawn, IL 60453-2600 · Phone (708) 684-5503 · Fax (708) 684-2675

Other Identifiers 1

Medicaid036090389IL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, AmeriHealth Caritas Next and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Martha Cotsen Saker Md 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 Martha Saker reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advocate Health And Hospitals Corp.
3.8 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
Shriners Hospitals For Children
9.1 mi
Anesthesiology
2211 N OAK PARK AVE
Chicago, IL 60707
  • Reassigned Medicare billing, Illinois enrollment
  • 99 clinicians in this Medicare group
NPI 1326536574 (773) 622-3351
Northwestern Medical Faculty Foundation
34 mi
Multi-Specialty
DEPT 5777
Carol Stream, IL 60122
  • Reassigned Medicare billing, Illinois enrollment
  • 4,817 clinicians in this Medicare group
NPI 1346235314 (855) 694-2866

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 60611 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.

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.

BESSEY ELIZABETH JOSE GEEVARGHESE DO
Pediatrics
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (630) 933-6631
CHRISTINA SOOJIN KIM M.D.
Pediatrics
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (443) 928-7458
JESSICA LAUREN OFFENBACH APN
Nurse Practitioner (Pediatrics)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000
MS. JENNY KO LEE APN
Nurse Practitioner (Neonatal)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (847) 962-6268
ERIN COHEN MD
Pediatrics (Hospice and Palliative Medicine)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000
DR. JOSEPH HART COLLINS MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-3550
ALEXIS LYN HARMON
Student in an Organized Health Care Education/Training Program
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000
SHANNON JULIA CONWAY MD
Student in an Organized Health Care Education/Training Program
225 E CHICAGO AVE
CHICAGO, IL 60611
Cook County (312) 227-4000

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 Martha Saker's NPI number?

The NPI number for Martha Saker is 1790779734. It was assigned to this individual provider in the NPPES registry on September 6, 2005.

Where is Martha Saker located?

Martha Saker practices at 225 E Chicago Ave, Chicago, IL 60611. The listed phone number is (312) 227-4500.

What is Martha Saker's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Martha Saker enrolled in Medicare?

Yes. Martha Saker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Martha Saker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Martha Saker reassigns Medicare benefits to 3 organizations: Advocate Health And Hospitals Corp. (Chicago, IL), Shriners Hospitals For Children (Chicago, IL) and Northwestern Medical Faculty Foundation (Carol Stream, 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 Martha Saker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Martha Saker accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, AmeriHealth Caritas Next, CareSource and Oscar Health list Martha Saker 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 Martha Saker was last updated on May 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.