MO
27 Years of Experience
Accepting patients
Who is Dr. O'neill, Adolescent Medicine Specialist in West Hartford, CT?
Dr. Margaret O'neill, MD is an Adolescent Medicine Specialist, who primarily practices in West Hartford, CT. She has been practicing for over 27 years and is board certified. Dr. O'neill completed her residency at Univ Of Ct Sch Of Med, Pediatrics; Children'S Hosp-Philadelphia, Pediatrics. Dr. O'neill is fluent in English and Spanish, and is currently seeing new patients. Dr. O'neill’s practice accepts Aetna, Cigna and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. O'neill’s office at (860) 561-4300.
What are Areas of Expertise for Dr. O'neill?
Dr. Margaret O'neill, MD is a highly-rated, board-certified Adolescent Medicine Specialist known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. O'neill empowers patients to confidently navigate their health journey, specializing in Adolescent Medicine, Newborn Care, Primary Care, and comprehensive wellness support. Serving the West Hartford, CT community, Dr. O'neill is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. O'neill go to medical school and complete their residency?
Residency: Univ Of Ct Sch Of Med, Pediatrics; Children'S Hosp-Philadelphia, Pediatrics
Medical School: University Of Ct Sch Of Med- Farmington Ct
Is Dr. O'neill board certified as an Adolescent Medicine Specialist?
Yes, Dr. Margaret O'neill, MD is board certified by the American Board of Pediatrics
What languages does Dr. O'neill speak?
Dr. O'neill and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does an Adolescent Medicine Specialist like Dr. O'neill typically treat?
As an Adolescent Medicine Specialist, Dr. O'neill diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. O'neill. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Failure to Thrive in Children
- Growth Disorder
- Poor growth in children
- Childhood growth problems
- Infant growth failure
ICD-10 Codes:
- R6251: Failure to thrive (child)
What procedures does an Adolescent Medicine Specialist like Dr. O'neill typically perform?
As an Adolescent Medicine Specialist, procedures performed by Dr. Margaret O'neill may include:
- Adolescent Annual Check Up
- Adolescent Medicine Consultation
- Adolescent Medicine Follow Up
- Adolescent Pap Smear / Annual GYN Exam
Please contact Dr. O'neill's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.
Does Dr. O'neill accept my insurance?
Dr. O'neill accepts most major insurance plans. Important: Please call our office at (860) 561-4300 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. O'neill accept in West Hartford, CT?
Dr. O'neill in West Hartford, CT accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Aetna
Blue Cross Blue Shield
Blue Cross Blue Shield of Illinois
Blue Cross Blue Shield of Michigan
Capital Blue Cross
Cigna
Cigna Group
Elevance Health Inc. (formerly Anthem)
Empire Blue Cross Blue Shield
State of Connecticut
View All Insurances
Where is Dr. O'neill's office located?
Dr. Margaret O'neill's Primary Practice
970 Farmington Ave Ste 201
West Hartford, CT 06107
(860) 561-4300
What is Dr. O'neill's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. O'neill's National Provider Identifier (NPI) number is 1942319157.
What common questions do patients ask about Dr. O'neill?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. O'neill
What is Dr. Margaret O'neill's specialty?
Dr. O'neill is a Adolescent Medicine Specialist near West Hartford, CT.
Is this Dr. Margaret O'neill affiliated with a ranked Castle Connolly Top Hospital?
No, O'neill is not affiliated with a Castle Connolly Top Hospital, but is affiliated with the following hospitals: Connecticut Children's Medical Center. Castle Connolly Top Hospitals are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see an Adolescent Medicine Specialist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see an Adolescent Medicine Specialist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Margaret O'neill accepting new patients in West Hartford, CT?
Yes, Dr. Margaret O'neill is accepting new patients at this time.
Does Dr. Margaret O'neill offer online booking?
Please contact Dr. O'neill's office at (860) 561-4300 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Margaret O'neill?
Please contact Dr. O'neill's office at (860) 561-4300 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Margaret O'neill have?
Dr. Margaret O'neill is certified by the American Board of Pediatrics.
Other Adolescent Medicine Specialist Near West Hartford, CT
DC
Adolescent Medicine Specialist
Dr. Della Corcoran, MD is an Adolescent Medicine Specialist, who primarily practices in West Hartford, CT. She has been practicing for over 26 years and is board certified.
West Hartford, CT

Adolescent Medicine Specialist
Dr. Leo Distefano, MD is an Adolescent Medicine Specialist, who primarily practices in West Hartford, CT. He has been practicing for over 29 years and is board certified.
West Hartford, CT
MM
Adolescent Medicine Specialist
Dr. Michael Moriarty, DO is an Adolescent Medicine Specialist, who primarily practices in Wethersfield, CT with 2 additional practice locations.
Wethersfield, CT