Dr Karen Hsia Ma, MD, PHARMD - Medicare Gastroenterology in Elmhurst, IL

Dr Karen Hsia Ma, MD, PHARMD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Elmhurst, Illinois. She graduated from medical school in 2013 and has 11 years of diverse experience with area of expertise as Gastroenterology. She is a member of the group practice Endeavor Health Medical Group and her current practice location is 155 E Brush Hill Rd, Elmhurst, Illinois. You can reach out to her office (for appointments etc.) via phone at (331) 221-9003.

Dr Karen Hsia Ma is licensed to practice in Illinois (license number 036-139551) 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 1124464789.

Contact Information

Dr Karen Hsia Ma, MD, PHARMD
155 E Brush Hill Rd,
Elmhurst, IL 60126-5658
(331) 221-9003
(331) 221-2743

Map and Direction




Physician's Profile

Full NameDr Karen Hsia Ma
GenderFemale
SpecialityGastroenterology
Experience11 Years
Location155 E Brush Hill Rd, Elmhurst, 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:
  • Dr Karen Hsia Ma graduated from medical school in 2013
  NPI Data:
  • NPI Number: 1124464789
  • Provider Enumeration Date: 05/21/2013
  • Last Update Date: 01/13/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 0244522597
  • Enrollment ID: I20190819003860

Medical Identifiers

Medical identifiers for Dr Karen Hsia Ma such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1124464789NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 036-139551 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Elmhurst Memorial HospitalElmhurst, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Endeavor Health Medical Group21633346992710

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. Dr Karen Hsia Ma allows following entities to bill medicare on her behalf.
Entity NameRush University Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093819542
PECOS PAC ID: 5496658874
Enrollment ID: O20040202000228
Entity NameElmhurst Memorial Healthcare
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1457493454
PECOS PAC ID: 9638168602
Enrollment ID: O20040506001298
Entity NameNorthshore University Healthsystem Faculty Practice Associates
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1497701882
PECOS PAC ID: 2163334699
Enrollment ID: O20040524000118

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. Dr Karen Hsia Ma 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
Dr Karen Hsia Ma, MD, PHARMD
4201 Winfield Rd,
Warrenville, IL 60555-4025

Ph: (331) 221-6377
Dr Karen Hsia Ma, MD, PHARMD
155 E Brush Hill Rd,
Elmhurst, IL 60126-5658

Ph: (331) 221-9003

Reviews and Comments


Internal Medicine Doctors in Elmhurst, IL

William T O'rourke, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 172 E Schiller St, Elmhurst, IL 60126
Phone: 331-221-0000    Fax: 331-221-2312
Maelen M Pantano, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 172 Schiller St, Elmhurst, IL 60126
Phone: 331-221-9001    Fax: 331-221-2315
Ramier J Lehne,
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 1200 S York St Ste 2000, Elmhurst, IL 60126
Phone: 331-221-9199    
Barbara E Potaczek, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 155 E Brush Hill Rd, Elmhurst, IL 60126
Phone: 331-221-8952    Fax: 331-221-3782
Dr. Lalitha Dileep-ansal, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 155 E Brush Hill Rd, Elmhurst, IL 60126
Phone: 331-221-8952    Fax: 331-221-3782
Dr. Omar Shamsi, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1200 S York St, Suite 1240, Elmhurst, IL 60126
Phone: 331-221-6140    Fax: 331-221-3838
Dhara Naik, DO
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 172 E Schiller St, Elmhurst, IL 60126
Phone: 331-221-0000    Fax: 331-221-2312

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.