Search Articles

Find Attorneys


Margaret A. O'Reilly

Margaret A. O'Reilly, PC

Margaret A. O'Reilly

Margaret A. O'Reilly, PC

Margaret A. O'Reilly

Margaret A. O'Reilly, PC

Margaret A. O’Reilly is an estate planning and elder law attorney with over thirty-five years of legal experience. Attorney O’Reilly graduated from Duke University with a degree in psychology, and received her law degree from Northeastern University School of Law in Boston, Massachusetts. For over 15 years, Attorney O’Reilly focused her practice on personal injury and medical malpractice litigation, representing injured persons in claims for compensation and benefits. Because of her work with the families of her clients, she developed an interest in end-of-life decision making and the ethical issues – both biomedical and legal – confronting families who are faced with these decisions. She studied health law and bioethics, and redirected her practice to the area of elder law. She continues to have a particular interest in health care decision-making and the difficult issues confronted by families in caring for an elderly relative.

Born and raised in Fairfax County, Attorney O’Reilly practiced law in the Boston area for 25 years before returning to northern Virginia in the fall of 2003. She is active in several community and non-profit groups, and serves on the board of directors for the Herndon Rotary Club and Arts Herndon. She is a frequent instructor for both legal and community groups, including Virginia Continuing Legal Education, the National Business Institute, and the Osher Lifelong Learning Institute of George Mason University.

Attorney O’Reilly is certified as a specialist in elder law by the National Elder Law Foundation, and has been selected as a member of the Council of Advanced Practitioners of the National Academy of Elder Law Attorneys. She serves on the board of directors of the Virginia Chapter of the National Academy of Elder Law Attorneys. Margaret A. O’Reilly, PC is included by US News & World Report in their 2018 Best Law Firms list. Firms in the list are recognized for professional excellence with persistently impressive ratings from clients and peers. Achieving a tiered ranking signals a unique combination of quality law practice and breadth of legal expertise. Attorney O’Reilly has been selected to the 2017 Virginia Super Lawyers list, an honor reserved for those lawyers who exhibit excellence in practice. Only 5% of attorneys in Virginia receive this distinction. Ms. O’Reilly also has been selected by her peers for inclusion in the 23rd edition (2017) of “Best Lawyers in America”. She is recognized as a “Super Lawyer” in the field of elder law, and as one of the top elder law attorneys in the greater Washington DC area by Washingtonian Magazine. Margaret O’Reilly, PC is ranked as one of the “Best Law Firms” for the DC area in 2017 by

She focuses her practice in the fields of estate planning, elder law, trust and estate administration, guardianships, and special needs planning.

Firm Description

Margaret A. O’Reilly, PC, is a community-based practice dedicated to providing estate planning services to clients of all ages and specialized elder law services to seniors and their families.


Day From To
Monday 9:00 AM 5:00 PM
Tuesday 9:00 AM 5:00 PM
Wednesday 9:00 AM 5:00 PM
Thursday 9:00 AM 5:00 PM
Friday 9:00 AM 5:00 PM


What Is an Elder Law Attorney?

Main Office

441 Carlisle Drive Ste A
Herndon, VA 20170

On the web

View Firm Website

Social Media

Medicaid Rules, etc

View All Elder Law Topics Questions & Answers State Medicaid Information