Mary Margaret Oneil
MD | Rheumatologist | 35+ years Exp
Medicare Enrolled
2355 Union Rd Ste 100, Cheektowaga
New York, 14227-2234
716-898-0755 716-898-0775
Maps & DirectionsMary Margaret Oneil is a Cheektowaga, New York based rheumatologist with 35 years of experience in Rheumatology. She completed her graduation from Saint Louis University School Of Medicine in 1990. She is also affiliated with hospitals like Sisters Of Charity Hospital and Kaleida Health. She accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Mary Margaret Oneil for Rheumatology is 188049-1 in New York.
Mary Margaret Oneil treat joint disease similar to orthopedists but do not perform surgeries. She diagnose and treat diseases of joints, muscle, bones and tendons which includes arthritis, back pain, muscle strains, common athletic injuries and 'collagen' diseases.
Complete Profile:
Mary Margaret Oneil speciality, credentials, practice address, contact phone number and fax are as below.
Patients can directly walk in or can call on the below given phone number for appointment.
| Specialization: | Rheumatology |
| Credentials: | MD |
| Experience: | 35+ years |
| Medical School Attended: | Saint Louis University School Of Medicine |
| Graduation Year: | 1990 |
| Gender: | Female |
| Accepts Medicare Assignment: | Yes |
| Practice Address: | 2355 Union Rd Ste 100, Cheektowaga,
New York, 14227-2234 |
| Phone: | 716-898-0755 |
| Fax: | 716-898-0775 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| PAC ID: | 9537292131 |
| Enrollment ID: | I20100803000937 |
| NPI Number: | 1598790818 |
| NPI Enumeration Date: | 12 Jul, 2006 |
| NPI Last Update On: | 11 Oct, 2022 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mary Margaret Oneil are as mentioned below.
| License Number | Specialization | State | Status | |
| 188049-1 | Rheumatologist | New York | Primary | |
Hospital Affiliation:
Surgeons are affiliated to many hospitals whom they worked with in the past or are presently working with. One surgeon can be affiliated to four to five hospitals at a time.
| Hospital Name (CCN) | State | Hospital Type |
| Sisters Of Charity Hospital (330078) | Buffalo, NY | Acute Care Hospital |
| Kaleida Health (330005) | Buffalo, NY | Acute Care Hospital |
| Brooks-tlc Hospital System, Inc (330229) | Dunkirk, NY | Acute Care Hospital |
| Mercy Hospital Of Buffalo(330279) | Buffalo, NY | Acute Care Hospital |
Group Practice:
Group practices are practice of medicine by a group of physicians who share their premises and other resources. Following list states all the group name
with which Mary Margaret Oneil is associated with along with the number of members in that group.
| Organization Name (Group PAC ID) | Members |
| Rheumatology Wellness Care Of Wny Pllc (4688978471) | 6 |
Other Medical Identifiers:
Other legacy medical identifiers associated with Mary Margaret Oneil such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
| Identifier | Type | State | Issuer |
| 01316201 | Medicaid | New York | |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | 2355 Union Rd Ste 100,
Cheektowaga, New York |
| Zip: | 14227-2234 |
| Phone Number: | 716-898-0755 |
| Fax Number: | 716-898-0775 |
Patients can reach Mary Margaret Oneil at
2355 Union Rd Ste 100, Cheektowaga, New York or can
call to book an appointment on 716-898-0755.
Comments/ Reviews:
Patients can read all the reviews posted for Mary Margaret Oneil below. You may also share your own experience like the quality of treatment, behavior, and overall care provided by Mary Margaret Oneil. It will help others make informed decisions.
** Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 13 October, 2025.