Margaret Mcmahon, MD - Medicare Internal Medicine in Maywood, IL

Margaret Mcmahon, MD is a medicare enrolled "Internal Medicine" physician in Maywood, Illinois. She went to Loyola University Of Chicago, Stritch School Of Medicine and graduated in 1994 and has 30 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Loyola University Medical Center and her current practice location is 2160 S First Ave, (300 N York Rd, Elmhurst, Illinois 60126), Maywood, Illinois. You can reach out to her office (for appointments etc.) via phone at (708) 327-7030.

Margaret Mcmahon is licensed to practice in Illinois (license number 36095051) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1851366900.

Contact Information

Margaret Mcmahon, MD
2160 S First Ave, (300 N York Rd, Elmhurst, Illinois 60126),
Maywood, IL 60153
(708) 327-7030
(630) 833-8834

Map and Direction




Physician's Profile

Full NameMargaret Mcmahon
GenderFemale
SpecialityInternal Medicine
Experience30 Years
Location2160 S First Ave, Maywood, Illinois
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Margaret Mcmahon attended and graduated from Loyola University Of Chicago, Stritch School Of Medicine in 1994
  NPI Data:
  • NPI Number: 1851366900
  • Provider Enumeration Date: 02/22/2006
  • Last Update Date: 02/02/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 2668514175
  • Enrollment ID: I20100121000677

Medical Identifiers

Medical identifiers for Margaret Mcmahon such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1851366900NPI-NPPES
36095051MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208000000XPediatrics 36095051 (Illinois)Secondary
207R00000XInternal Medicine 36095051 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Loyola Medicine Home CareOak brook, ILHome health agency
Loyola University Medical CenterMaywood, ILHospital
Gottlieb Memorial HospitalMelrose park, ILHospital
Elmhurst Memorial HospitalElmhurst, ILHospital
West Suburban Medical CenterOak park, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Loyola University Medical Center3779488903863

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Margaret Mcmahon allows following entities to bill medicare on her behalf.
Entity NameLoyola University Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336159961
PECOS PAC ID: 3779488903
Enrollment ID: O20031202000027

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Margaret Mcmahon is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Margaret Mcmahon, MD
2160 S First Ave, (300 N York Rd, Elmhurst, Illinois 60126),
Maywood, IL 60153

Ph: (708) 327-7030
Margaret Mcmahon, MD
2160 S First Ave, (300 N York Rd, Elmhurst, Illinois 60126),
Maywood, IL 60153

Ph: (708) 327-7030

Reviews and Comments


Internal Medicine Doctors in Maywood, IL

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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.