Karen O'mara, DO - Medicare Internal Medicine in Oak Lawn, IL

  1. Home
  2. Critical Care Medicine
  3. IL
  4. Oak Lawn
Karen O'mara, DO is a medicare enrolled "Internal Medicine - Critical Care Medicine" physician in Oak Lawn, Illinois. Her current practice location is 9555 S 52nd Ave, Oak Lawn, Illinois. You can reach out to her office (for appointments etc.) via phone at (708) 684-6867.

Karen O'mara is licensed to practice in Illinois (license number 036-057006) 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 1235112269.

Contact Information

Karen O'mara, DO
9555 S 52nd Ave,
Oak Lawn, IL 60453-3054
(708) 684-6867
(708) 684-6869

Map and Direction




Physician's Profile

Full NameKaren O'mara
GenderFemale
SpecialityInternal Medicine - Critical Care Medicine
Location9555 S 52nd Ave, Oak Lawn, Illinois
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1235112269
  • Provider Enumeration Date: 11/23/2005
  • Last Update Date: 06/18/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 7416907670
  • Enrollment ID: I20220324002184

Medical Identifiers

Medical identifiers for Karen O'mara such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1235112269NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207PE0004XEmergency Medicine - Emergency Medical Services 036057006 (Illinois)Secondary
207RC0200XInternal Medicine - Critical Care Medicine 05-43634 (Kansas)Secondary
207RC0200XInternal Medicine - Critical Care Medicine 036-057006 (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. Karen O'mara allows following entities to bill medicare on her behalf.
Entity NameAscension Via Christi Hospital Pittsburg, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760408975
PECOS PAC ID: 0547171670
Enrollment ID: O20031105000718
Entity NameMercy Clinic Pittsburg Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1912751884
PECOS PAC ID: 7618418088
Enrollment ID: O20240925002855

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. Karen O'mara 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
Karen O'mara, DO
29373 Network Pl,
Chicago, IL 60673-1293

Ph: (847) 390-5900		Karen O'mara, DO
9555 S 52nd Ave,
Oak Lawn, IL 60453-3054

Ph: (708) 684-6867

Reviews and Comments


Internal Medicine Doctors in Oak Lawn, IL

Darshika Chhabra, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4400 W 95th St Ste 112, Oak Lawn, IL 60453
Phone: 708-684-7100    
Ronald Myint, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4400 W 95th St, Suite 311, Oak Lawn, IL 60453
Phone: 708-424-9710    Fax: 708-424-8904
Dr. Mandy Luma Enshiwat, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4440 W 95th St, Oak Lawn, IL 60453
Phone: 708-684-8000    
Mahesh Vadali, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 10458 S Pulaski Rd, Oak Lawn, IL 60453
Phone: 708-636-1818    Fax: 708-636-2151
Mihaela Mihailescu, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4440 W 95th St, Oak Lawn, IL 60453
Phone: 708-684-8000    
Alexandria Clarke Kregor, DO
Critical Care Medicine
Medicare: Medicare Enrolled
Practice Location: 4440 W 95th St, Oak Lawn, IL 60453
Phone: 708-684-5673    
Dr. Bruce M Abramowitz, M.D.,F.A.C.C.
Critical Care Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 10837 S Cicero Ave, Suite 200, Oak Lawn, IL 60453
Phone: 708-636-7575    Fax: 708-636-6193

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.