Mary Margaret Oneil, MD
Rheumatology Physician · Cheektowaga, NY
Mary Margaret Oneil, MD is a rheumatology physician with a practice address in Cheektowaga, New York, and NPI 1598790818, issued on Jul 12, 2006. Check the license (New York 188049-1, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mary Margaret Oneil
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 188049-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2355 Union RD Ste 100, Cheektowaga, NY 14227
- Phone
- (716) 898-0755
- Enumerated
- Jul 12, 2006
- Record last updated
- Oct 11, 2022
- Fax
- (716) 898-0775
- Medicaid ID
- 01316201 NY
- Medicare enrollment
- Enrolled (PECOS I20100803000937); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 599 in New York → Look up another NPI →
Verify Mary Margaret Oneil in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 188049-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average rheumatology physician in 2024
2,031 Medicare Part D claims for 457 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Hydroxychloroquine Sulfate351 claims
- Prednisone307 claims
- Methotrexate207 claims
- Meloxicam72 claims
- Methylprednisolone60 claims
- Folic Acid59 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 86 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $44.11
2 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Brain And Spine Medical Services PLLCCheektowaga, NY
- Rheumatology Wellness Care OF Wny PLLCCheektowaga, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Margaret Oneil among 599 rheumatology physician records in New York
Mary Margaret Oneil, MD is one of 599 rheumatology physician records with a practice address in New York. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1990 · median 2003 among the 425 with a school on file
- Record last updated2022 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in New York
There are 599 rheumatology physician records in New York.
All 599 in New York → Every provider in Cheektowaga → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Jihad Abialmouna, M.D.West Amherst, NY 142281396793782
- Emoke Gomez, M.D.Buffalo, NY 142281598790768
- Edgardo Salvador, MDAmherst, NY 142261528080306
- Kostas Botsoglou, M.D.Cheektowaga, NY 142251295981652
- Ekaterini Zapantis, MDCheektowaga, NY 142251417249202
- Jennifer Bognar, PA-CWest Seneca, NY 142241114449196
- Carlos Martinez, M.D.West Seneca, NY 142241366476897
- Abby McCarville, PAWest Seneca, NY 142241316932262
Common questions
What is Mary Margaret Oneil, MD's NPI number?
Mary Margaret Oneil, MD's National Provider Identifier (NPI) is 1598790818, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Margaret Oneil, MD located?
The NPPES record lists a practice address at 2355 Union RD Ste 100, Cheektowaga, NY, 14227. Phone: (716) 898-0755. Providers update this record themselves, so call before visiting.
How can I verify Mary Margaret Oneil, MD's license?
NPPES lists New York license number 188049-1, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Margaret Oneil, MD prescribe under Medicare Part D?
In 2024, Mary Margaret Oneil, MD had 2,031 Medicare Part D claims for 457 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Mary Margaret Oneil, MD's MIPS final score?
The 2023 MIPS final score is 86 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.