Mary Margaret Oneill, MD
With over 41 years in obstetrics & gynecology, Mary Margaret Oneill, MD is a long-established OB/GYN in Campbell. Trained at Creighton University School of Medicine (class of 1985), she has been practicing for over 41 years. Among her Medicare patients, common conditions include high cholesterol, hypertension, and arthritis (per CMS data).
At a glance
- Uses generic medications more than 33% of reporting doctors in California
- Virtual visits available — no app or travel required
Older · 2241dNPPES updated 2020-03-17 · verify on CMS
Contact & Location
Practice Location
200 W Campbell Ave, Campbell, CA 95008-1030
How Does This Doctor Compare?
Based on Medicare data, this doctor favors affordable generic drugs over brand-name ones.
Generic Rx
↑ Higher = better83.7%
California avg: 83.3 · US avg: 82.8
✓ Higher than most doctors nationally(+0.9 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
110
Unique beneficiaries
Standard volumePrescription Recipients
49
Patients prescribed
Prescriptions Written
92
Total claims
Total Medicare drug cost: $11k
Percentile rankings compared against 9,360 reporting peers in California.
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 High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-11%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-15%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+12%) — a focus area for this doctor
Diseases involving abnormal cell growth with potential to spread to other body parts
US avg: 20.8%↑ More patients than average (+4%) — a focus area for this doctor
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-11%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-12%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$109 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 Oneill's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1985
Creighton University School of Medicine
Board certified · Mar 16, 2020
CMS-verified certification date
41 years in practice
Senior practitioner
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
Taxonomy: 207V00000X
Education & Training
Creighton University School of Medicine (Class of 1985)
Primary hospital affiliation: Psychiatric
CMS Certification Number: 194115
View hospital on Medicare Care CompareVirtual Obstetrics & Gynecology Care With Mary Margaret Oneill
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mary Margaret Oneill for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Campbell 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 Oneill
Dr. Oneill is listed as active in the NPI registry with telehealth listed in Campbell, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (408) 583-0522.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Mary Margaret Oneill
Practice Location
200 W Campbell Ave, Campbell, CA 95008-1030
Mailing Address
200 W Campbell Ave, Campbell, CA 95008-1030
This is a provider directory. Contact the office directly to schedule appointments.
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