Complete Story
03/11/2026
Meet Sandra Hasson: The Pillar of Personal Injury Billing
In the intricate world of Personal Injury (PI) billing, few names command as much respect and recognition as Sandra Hasson.
Meet Sandra Hasson: The Pillar of Personal Injury Billing
In the intricate world of Personal Injury (PI) billing, few names command as much respect and recognition as Sandra Hasson. With more than 25 years of experience, Sandra’s career has evolved from a chance encounter with supplemental billing to a lifelong crusade for justice through accuracy, integrity, and advocacy.
A Fortuitous Beginning
Sandra’s journey into the realm of PI billing began with an introduction to supplemental billing for MedPay and PIP claims. Her insatiable curiosity to understand the “why” behind every detail led her to study under James Mathis, a colossal figure in PI documentation and coding. Under his mentorship, Sandra mastered the art of medical record optimization, learning to turn complex documentation into a powerful tool for truth and justice. What might have been a mere professional opportunity for others became life’s calling for Sandra.
Building a Legacy: The Birth of M.R.S.
In 1997, Sandra founded Medical Resource Services (M.R.S.), a medical billing firm that would redefine what it means to serve both the medical and legal communities. M.R.S. soon transformed into a strategic partnership model, where attorneys and clinicians alike could rely on Sandra’s team to ensure every diagnostic nuance and treatment narrative was not just recorded — but represented with meticulous precision and resilient purpose.
At its core, M.R.S. is built on one principle: every claim deserves to be championed. Through decades of hands-on experience, Sandra has developed systems and tools that go beyond billing — they provide clarity, confidence, and credibility.
Why Sandra’s Expertise Matters
For Attorneys
Sandra’s pioneering innovation, the Attorney Code Tracker, has become an indispensable asset in PI settlements. Designed to bridge the gap between medical documentation and legal requirements, this proprietary system serves as a blueprint for robust claim construction. It empowers attorneys to align medical records with case strategy, strengthen negotiations, and support litigation with airtight precision.
For Clinicians
In an industry where the administrative burden often overshadows patient care, Sandra serves as a lifeline. Her deep understanding of PI billing complexities allows clinicians to focus on what matters most — helping patients heal — while M.R.S. ensures that every procedure, diagnosis, and treatment is documented with precision and paid appropriately.
The Next Chapter: Meet Sarah Hasson
The story of M.R.S. is also a story of resilience, legacy, and reinvention. Enter Sarah Hasson, Sandra’s daughter and the next torch bearer of the M.R.S. mission.
Sarah’s life took an unexpected turn during her senior year of high school when a severe car accident changed her trajectory. Her recovery introduced her to the critical work her mother had dedicated her life to — and ultimately inspired her to join M.R.S. after regaining her health.
Originally bound for a career with law enforcement, Sarah’s path was redirected after undergoing spinal surgery. Embracing this shift, she began working as a legal assistant and quickly advanced at a law firm. These experiences proved invaluable, giving her a rare dual perspective — one that bridges the legal and medical worlds.
Today, Sarah stands as an essential force within both M.R.S. and law firms, overseeing the critical process of obtaining and managing medical records and bills. Even after facing another accident, Sarah’s determination remains unshaken. Her empathy for clients and understanding of their struggle fuels her commitment to helping others navigate their claims. Her compassion and drive reflect not only her mother’s legacy but a new generation’s energy and innovation.
The M.R.S. Edge
Together, Sandra and Sarah Hasson represent more than a business; they represent a movement toward fairness, clarity, and empowerment in the personal injury industry. At M.R.S, each claim is treated not as a file, but as a story — a patient’s story — and Sandra ensures every single one is told completely and correctly. The M.R.S. team doesn’t just process claims- they fight for the integrity of the record and the right of every patient and client to fair compensation. This philosophy, paired with a commitment to exceptional customer service, has earned M.R.S. lasting relationships across the medical and legal sectors. The team’s availability, responsiveness, and dedication ensure that clients always have the support they need when they need it; because in the world of personal injury, accuracy isn’t just technical — it’s transformational. Their unwavering dedication to service and excellence has made M.R.S. a trusted name nationwide.
Medical Resource Services (M.R.S.)
Billing. Advocacy. Precision.
Serving attorneys and clinicians with integrity since 1997.
