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Summary
Dr. John Oneill is an internal medicine physician who also specializes in emergency medicine. He earned his medical degree from SUNY Downstate Medical Center College of Medicine and brings 24 years of clinical experience to his practice. Dr. Oneill speaks English and provides comprehensive care across both inpatient and emergency settings.
Dr. Oneill is affiliated with MedStar Georgetown University Hospital and Allegheny General Hospital, practicing in Washington, DC. He treats patients with complex conditions including head injuries, strokes, and neck strains. His expertise extends to diagnostic imaging procedures such as CT scans and chest X-rays. John Oneill combines his dual specialty training to deliver thorough medical care for both routine internal medicine needs and urgent health situations.
Dr. Oneill is affiliated with MedStar Georgetown University Hospital and Allegheny General Hospital, practicing in Washington, DC. He treats patients with complex conditions including head injuries, strokes, and neck strains. His expertise extends to diagnostic imaging procedures such as CT scans and chest X-rays. John Oneill combines his dual specialty training to deliver thorough medical care for both routine internal medicine needs and urgent health situations.
Overview based on verified provider data
Quick Facts
- 24 years of experience
- speaks English
- Suny Downstate Medical Center College Of Medicine
- 2 specialties
- 2 areas of expertise
- 2 board certifications
- 2 hospital affiliations
- 2 office locations
- Male
Office Locations
Dr. John Michael Oneill has 2 locationsCompare with Similar Doctors
 |  |  |  |
| Dr. John Michael Oneill, MD | Dr. Sharon McCormack, MD | Victoria Thee, PA-C | Dr. Rakesh Malik, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | ||
| 24 Years of Experience | 41 Years of Experience | 3 Years of Experience | |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English | Speaks English | Speaks English | Speaks English |
| Washington , DC | Columbia , MD | Germantown , MD | Germantown , MD |
| Med School: Suny Downstate Medical Center College Of Medicine | Med School: University of Maryland School of Medicine | Med School: Salus University | Med School: University College of Medical Sciences, New Delhi, India |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. John Michael Oneill
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Dr. John Michael Oneill has the following 2 specialties
Specialty Expertise
Dr. John Michael Oneill has the following 2 areas of expertise
Certifications, License, & Education
24 Years Experience
MEDICAL LICENSE
Medical Doctor, District Of Columbia, 2026, Active
EDUCATION & TRAINING
Medical School
Suny Downstate Medical Center College Of MedicineGraduated in 2002
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Frequently Asked Questions
- Is Dr. John Oneill accepting new patients?
- Dr. John Oneill has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
- Does Dr. John Oneill accept my insurance?
- You can see the insurance plans that Dr. John Oneill accepts on their Vitals profile.
- Which hospitals is Dr. John Oneill affiliated with?
- Dr. John Oneill is affiliated with Medstar Georgetown University Hospital and ALLEGHENY GENERAL HOSPITAL.
- How can I make an appointment with Dr. John Oneill?
- You can find contact information for Dr. John Oneill here on Vitals.
- Where is Dr. John Oneill's office located?
- Dr. John Oneill's office is located at 3800 Reservoir Rd Nw, Washington, DC, 20007.
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