Dr Patricia A Merwick, MD - Medicare Internal Medicine in Elmhurst, IL

Dr Patricia A Merwick, MD is a medicare enrolled "Internal Medicine - Geriatric Medicine" physician in Elmhurst, Illinois. Her current practice location is 533 W North Ave, Suite 101, Elmhurst, Illinois. You can reach out to her office (for appointments etc.) via phone at (630) 279-8771.

Dr Patricia A Merwick is licensed to practice in Illinois (license number 036045874) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1336117084.

Contact Information

Dr Patricia A Merwick, MD
533 W North Ave, Suite 101,
Elmhurst, IL 60126-2135
(630) 279-8771
(630) 279-8576

Map and Direction




Physician's Profile

Full NameDr Patricia A Merwick
GenderFemale
SpecialityInternal Medicine - Geriatric Medicine
Location533 W North Ave, Elmhurst, Illinois
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1336117084
  • Provider Enumeration Date: 03/09/2006
  • Last Update Date: 12/26/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 5890827430
  • Enrollment ID: I20100719000202

Medical Identifiers

Medical identifiers for Dr Patricia A Merwick such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1336117084NPI-NPPES
036045874MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0300XInternal Medicine - Geriatric Medicine 036045874 (Illinois)Primary

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 Patricia A Merwick allows following entities to bill medicare on her behalf.
Entity NameDupage Medical Group Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801833983
PECOS PAC ID: 5496667941
Enrollment ID: O20031110000535

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 Patricia A Merwick 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 Patricia A Merwick, MD
1860 Payshere Cir,
Chicago, IL 60674-2135

Ph: (630) 469-9200
Dr Patricia A Merwick, MD
533 W North Ave, Suite 101,
Elmhurst, IL 60126-2135

Ph: (630) 279-8771

Reviews and Comments


Internal Medicine Doctors in Elmhurst, IL

William T O'rourke, MD
Geriatric Medicine
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
Geriatric Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 172 Schiller St, Elmhurst, IL 60126
Phone: 331-221-9001    Fax: 331-221-2315
Ramier J Lehne,
Geriatric Medicine
Medicare: Medicare Enrolled
Practice Location: 1200 S York St Ste 2000, Elmhurst, IL 60126
Phone: 331-221-9199    
Barbara E Potaczek, MD
Geriatric Medicine
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
Geriatric Medicine
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
Geriatric Medicine
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
Geriatric Medicine
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.