Mary Masters, MD - Medicare Infectious Disease in Chicago, IL

Mary Masters, MD is a medicare enrolled "Internal Medicine - Infectious Disease" physician in Chicago, Illinois. She went to Washington University School Of Medicine and graduated in 2014 and has 10 years of diverse experience with area of expertise as Infectious Disease. She is a member of the group practice Northwestern Medical Faculty Foundation and her current practice location is 251 E Huron St, Chicago, Illinois. You can reach out to her office (for appointments etc.) via phone at (312) 926-2000.

Mary Masters is licensed to practice in Illinois (license number 036142343) 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 1811300734.

Contact Information

Mary Masters, MD
251 E Huron St,
Chicago, IL 60611-2908
(312) 926-2000
Not Available

Map and Direction




Physician's Profile

Full NameMary Masters
GenderFemale
SpecialityInfectious Disease
Experience10 Years
Location251 E Huron St, Chicago, 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:
  • Mary Masters attended and graduated from Washington University School Of Medicine in 2014
  NPI Data:
  • NPI Number: 1811300734
  • Provider Enumeration Date: 06/09/2014
  • Last Update Date: 07/21/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 7214153261
  • Enrollment ID: I20201104001600

Medical Identifiers

Medical identifiers for Mary Masters such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1811300734NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 125064674 (Illinois)Secondary
207RI0200XInternal Medicine - Infectious Disease 036142343 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Northwestern Memorial HospitalChicago, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Northwestern Medical Faculty Foundation45875768143352

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. Mary Masters allows following entities to bill medicare on her behalf.
Entity NameNorthwestern Medical Faculty Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346235314
PECOS PAC ID: 4587576814
Enrollment ID: O20031105000541

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. Mary Masters 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
Mary Masters, MD
251 E Huron St,
Chicago, IL 60611-2908

Ph: (312) 926-2000
Mary Masters, MD
251 E Huron St,
Chicago, IL 60611-2908

Ph: (312) 926-2000

Reviews and Comments


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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.