Dr. Jack O’Brien, a board-certified family medicine physician, HIV specialist, and co-founder of Haven Health, has died at the age of 36. His passing on June 27, 2026, has left patients, colleagues, and the broader LGBTQ+ healthcare community mourning the loss of a compassionate physician whose commitment to inclusive, patient-centered care transformed countless lives.
The heartbreaking news was shared by Haven Health in a letter to patients, confirming that Dr. O’Brien passed away on June 27, 2026. The practice described him as not only a gifted physician but also the driving force behind a vision of healthcare built on compassion, dignity, and respect.
A Physician Who Made Every Patient Feel Seen
Dr. O’Brien was widely recognized for his dedication to family medicine and HIV care, with a particular focus on serving the LGBTQ+ community. Throughout his career, he earned the admiration of patients for creating a welcoming environment where individuals felt heard, understood, and genuinely cared for.
According to Haven Health, “Jack had a gift for making people feel seen.” That quality became the hallmark of his medical practice and the inspiration behind the creation of Haven Health.
As a Board-Certified Family Medicine Physician and HIV Specialist, Dr. O’Brien dedicated his professional life to ensuring equitable access to compassionate healthcare. His approach emphasized trust, empathy, and personalized treatment, making a lasting impact on the lives of those he served.
Driven by a desire to create a different kind of medical practice, Dr. O’Brien co-founded Haven Health alongside Matty Brownell and another partner. Together, they built the practice around the belief that every patient deserves affirming, comprehensive, and high-quality care.
His colleagues described Haven Health as the realization of Dr. O’Brien’s vision—a place where healthcare extended beyond diagnoses and treatments to foster meaningful relationships and genuine human connection.
Although his passing leaves an immeasurable void, Haven Health has affirmed its commitment to continuing the mission Dr. O’Brien helped establish. His co-founders have pledged to carry forward the work they began together while preserving the values and philosophy that defined his leadership.
The announcement of Dr. O’Brien’s death has prompted an outpouring of grief from patients, coworkers, and members of the LGBTQ+ community, many of whom credit him with changing their lives through his compassionate care.
For countless patients, he was more than a physician—he was a trusted advocate, mentor, and source of comfort during some of life’s most difficult moments. Friends and colleagues remember him as an intelligent, kind-hearted professional whose warmth and generosity touched everyone around him.
Haven Health has announced that patient care will resume on Wednesday, July 8, with clinical staff continuing operations while supporting patients affected by Dr. O’Brien’s passing. Individuals who were under his direct care will receive additional information regarding continuity of care and available options in the coming days.
The practice also announced plans for a public Celebration of Life, with details to be shared once arrangements have been finalized. Haven Health expects the gathering to reflect the tremendous number of lives Dr. O’Brien touched throughout his career.
Remembering Dr. Jack O’Brien
Dr. Jack O’Brien’s death is a profound loss for the medical profession and the many patients who found hope, healing, and acceptance through his care. Though his life was tragically cut short at just 36 years old, his influence will continue through the practice he helped build, the colleagues he inspired, and the countless lives he changed.
Dr. Jack O’Brien will be remembered as an exceptional physician, visionary healthcare leader, and compassionate advocate whose legacy of empathy, inclusion, and service will endure for generations to come.
