Mary Margaret Oneil, MD - Medicare Rheumatology in Cheektowaga, NY

Mary Margaret Oneil, MD is a medicare enrolled "Internal Medicine - Rheumatology" physician in Cheektowaga, New York. She went to Saint Louis University School Of Medicine and graduated in 1990 and has 34 years of diverse experience with area of expertise as Rheumatology. She is a member of the group practice Rheumatology Wellness Care Of Wny Pllc and her current practice location is 2355 Union Rd Ste 100, Cheektowaga, New York. You can reach out to her office (for appointments etc.) via phone at (716) 898-0755.

Mary Margaret Oneil is licensed to practice in New York (license number 188049-1) 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 1598790818.

Contact Information

Mary Margaret Oneil, MD
2355 Union Rd Ste 100,
Cheektowaga, NY 14227-2234
(716) 898-0755
(716) 898-0775

Map and Direction




Physician's Profile

Full NameMary Margaret Oneil
GenderFemale
SpecialityRheumatology
Experience34 Years
Location2355 Union Rd Ste 100, Cheektowaga, New York
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 Margaret Oneil attended and graduated from Saint Louis University School Of Medicine in 1990
  NPI Data:
  • NPI Number: 1598790818
  • Provider Enumeration Date: 07/12/2006
  • Last Update Date: 10/11/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 9537292131
  • Enrollment ID: I20100803000937

Medical Identifiers

Medical identifiers for Mary Margaret Oneil such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1598790818NPI-NPPES
01316201MedicaidNY

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RR0500XInternal Medicine - Rheumatology 188049-1 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Brooks-tlc Hospital System, IncDunkirk, NYHospital
Sisters Of Charity HospitalBuffalo, NYHospital
Kaleida HealthBuffalo, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Rheumatology Wellness Care Of Wny Pllc46889784715

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 Margaret Oneil allows following entities to bill medicare on her behalf.
Entity NameRheumatology Wellness Care Of Wny Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1992161582
PECOS PAC ID: 4688978471
Enrollment ID: O20160216000460

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 Margaret Oneil 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 Margaret Oneil, MD
2355 Union Rd Ste 100,
Cheektowaga, NY 14227-2234

Ph: (716) 898-0755
Mary Margaret Oneil, MD
2355 Union Rd Ste 100,
Cheektowaga, NY 14227-2234

Ph: (716) 898-0755

Reviews and Comments


Internal Medicine Doctors in Cheektowaga, NY

Joseph Dipirro, M.D.
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 2625 Harlem Rd, Suite 180, Cheektowaga, NY 14225
Phone: 716-893-4797    Fax: 716-893-1697
Shaikh Arif Manzoor, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 132 Cayuga Rd, Suite 1-c, Cheektowaga, NY 14225
Phone: 716-204-9711    Fax: 716-204-9717
Dr. Ghulam S Masoodi, MD
Rheumatology
Medicare: Not Enrolled in Medicare
Practice Location: 928 French Rd # B, Cheektowaga, NY 14227
Phone: 716-668-2592    Fax: 716-668-1383
Dr. Rajarshi Parai, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 3091 William St, Cheektowaga, NY 14227
Phone: 716-822-3098    
Eugene James Kalmuk Jr., MD
Rheumatology
Medicare: Medicare Enrolled
Practice Location: 2625 Harlem Rd, Suite 180, Cheektowaga, NY 14225
Phone: 716-893-4797    Fax: 716-893-1697
Pedro G Joven, M.D.
Rheumatology
Medicare: Not Enrolled in Medicare
Practice Location: 162 George Urban Blvd, Cheektowaga, NY 14225
Phone: 716-895-6826    Fax: 716-895-1397
Nawfal Alkhafaji, MD
Rheumatology
Medicare: Accepting Medicare Assignments
Practice Location: 3091 William St, Cheektowaga, NY 14227
Phone: 716-822-3098    Fax: 716-819-1809

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.