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Edit this profileAt a glance
- 200 W Campbell Ave, Campbell, CA 95008
About Dr. Oneill
Mary M. Oneill, MD practices obstetrics & gynecology in Campbell, CA. Mary is a 1985 graduate of Creighton University School of Medicine. Mary is also listed as specializing in gynecology and obstetrics. Medicare claims data shows Mary provided 184 services to 163 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, cervical or vaginal cancer screening; pelvic and clinical breast examination, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more. The provider's National Provider Identifier (NPI) is 1215142419.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (408) 583-0522
- Email not available
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Practice Locations
200 W CAMPBELL AVE
Campbell, CA 95008
Conditions Commonly Evaluated or Treated
Within Obstetrics and Gynecology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Contraception
Fertility
High-risk or subspecialty
Infections
Pelvic pain and benign gynecology
- Uterine fibroids
- Chronic pelvic pain
- Ovarian cysts
- Painful intercourse
- Pelvic organ prolapse
- Urinary incontinence in women
Most searched conditions
Infections and vulvovaginal conditions
Menstrual and hormonal
- Absent periods
- Genitourinary syndrome of menopause
- Painful periods
- Perimenopause
- Premenstrual syndrome
Pregnancy
- Ectopic pregnancy
- Gestational diabetes
- Hyperemesis gravidarum
- Miscarriage
- Placenta previa
- Postpartum depression
- Preeclampsia
- Preterm labor
Cancer and precancer
- Abnormal cervical cells and cervical dysplasia
- Cervical cancer
- Endometrial cancer
- Endometrial hyperplasia
- Ovarian cancer
Pregnancy Complications
Vaginal & Vulvar Health
Procedures & services
Diagnostic Tests
Hormone & Menopause
Laparoscopic and adnexal surgery
Pelvic floor
Pregnancy and delivery
Preventive and diagnostic
- Pelvic examination
- Transvaginal ultrasound
- Well-woman examination
- Colposcopy
- Endometrial biopsy
- Human papillomavirus testing
Subspecialty procedures
Surgeries
Most searched procedures
Contraception and office treatment
Birth Control
Contraception
Diagnostic Procedures
- Amniocentesis
Fertility
- Egg freezing
- Intrauterine Insemination (IUI)
Postpartum Care
Pregnancy & Prenatal
Preventive Care
Preventive Screening
Routine Exams
Uterine and cervical procedures
Procedures Most Often Billed to Medicare
184 services · 163 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Limited ultrasound scan of pelvis | Imaging | 76857 |
11 | Less often than most peers in OB-GYN |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
71 | More often than most peers in OB-GYN |
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
67 | More often than most peers in OB-GYN |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
19 | Less often than most peers in OB-GYN |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Billing code | Q0091 |
16 | Less often than most peers in OB-GYN |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other OB-GYNs in Campbell 8
Same specialty, same city.
Trained at Creighton University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 1985 at Creighton University School of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Limited ultrasound scan of pelvis 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Oneill's specialty?
Dr. Oneill is an OB-GYN in Campbell, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Obstetrics & Gynecology”.
NPI registry
Where can I find Dr. Oneill?
Dr. Oneill is listed at 200 W Campbell Ave, Campbell, CA 95008. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Oneill?
The number on file is (408) 583-0522. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Oneill?
Dr. Oneill's National Provider Identifier is 1215142419. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Oneill's medical education?
Dr. Oneill attended Creighton University School of Medicine, graduating in 1985. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Oneill have?
Dr. Oneill has 41 years experience. Calculated from a graduation year of 1985, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Oneill known for?
According to Medicare billing data, Dr. Oneill performs imaging including limited ultrasound scan of pelvis, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Oneill's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Oneill. If this is you, claiming it is free.
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