Mary Margaret Oneil, MD
Rheumatology Internal Medicine
Mary Margaret Oneil is a Rheumatology Internal Medicine specialist based in Cheektowaga, NY with over 36 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
With over 36 years in internal medicine, Mary Margaret Oneil, MD is a long-established rheumatologist in Cheektowaga. She graduated from Saint Louis University School of Medicine in 1990 and has 36+ years of clinical experience. She regularly sees Medicare patients with arthritis, high cholesterol, and hypertension (per CMS claims data). CMS MIPS quality score: 85.98/100 (2023).
At a glance
- Federal MIPS score higher than 39% of MIPS-scored doctors in New York
- Virtual visits available — no app or travel required
Older · 1320dNPPES updated 2022-10-11 · verify NPI on CMS · Verify license at New York State Board for Medicine
Contact & Location
Practice Location
2355 Union Rd Ste 100, Cheektowaga, NY 14227-2234
How Does This Doctor Compare?
MIPS Score
202385.98/100
New York avg: 87 · US avg: 83.6
✓ Higher than most doctors nationally(+2.4 pts)
How the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Medicare Patients
238
Unique beneficiaries
Standard volumePrescription Recipients
460
Patients prescribed
Prescriptions Written
2,168
Total claims
Total Medicare drug cost: $1.29M
Percentile rankings compared against 8,064 reporting peers in New York.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Arthritis, High Cholesterol, and Hypertension.
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+26%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+4%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+16%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-2%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+1%) — a focus area for this doctor
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↓ Fewer patients than average (-1%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$44 received from industry
2 transactions reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Mary Margaret Oneil's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1990
Saint Louis University School of Medicine
Board certified · Oct 10, 2022
Self-reported via NPPES
36 years in practice
Senior practitioner
Rheumatologists treat autoimmune and inflammatory conditions including rheumatoid arthritis, lupus, psoriatic arthritis, gout, osteoarthritis, and vasculitis. They manage biologic therapies and joint-preserving treatments.
Taxonomy: 207RR0500X
Education & Training
Saint Louis University School of Medicine (Class of 1990)
Virtual Internal Medicine Care With Mary Margaret Oneil
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mary Margaret Oneil for arthritis follow-ups, cholesterol management, blood pressure monitoring — no travel to Cheektowaga required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Mary Margaret Oneil
NPI records show Dr. Oneil as active with telehealth listed in Cheektowaga, NY. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (716) 898-0755.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Mary Margaret Oneil
Practice Location
2355 Union Rd Ste 100, Cheektowaga, NY 14227-2234
Mailing Address
2355 Union Rd Ste 100, Cheektowaga, NY 14227-2234
This is a provider directory. Contact the office directly to schedule appointments.
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