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About Us
Our team
At POSM, patient safety and excellence in care are our top priorities. We achieve this through:
• Comprehensive Preoperative Screening: Ensuring patient readiness before surgery.
• Intraoperative Best Practices: Standardizing protocols for optimal surgical outcomes.
• Efficient Postoperative Recovery: Prioritizing timely and safe patient recovery.
Culture & Values
POSM is committed to fostering a culture of safety, teamwork, and interdepartmental collaboration. We continuously review best practices and partner with institutions to develop policies that enhance patient care.
We empower our team members by:
• Encouraging them to practice at the full capacity of their licenses.
• Providing leadership opportunities to promote professional growth.
• Strengthening interdepartmental cooperation to optimize the perioperative experience.
POSM is committed to educating and mentoring future anesthesia practitioners who will serve the state of Mississippi. As part of this mission, we currently train CRNA students from the University of Alabama at Birmingham and the University of Southern Mississippi, recognizing this as both a responsibility and a vital investment in the future of anesthesia care.
Through a shared commitment to excellence, POSM ensures that both patients and healthcare institutions receive the highest level of anesthesia care.
Our history
POSM was founded by Larry J. Nixon, MD, a physician with over 18 years of hospital leadership experience. Dr. Nixon has held key roles, including Chief of Staff, Director of Anesthesia, Medical Director, and Board Member at various medical facilities.
Dr. Nixon began his career as a partner in a small anesthesia group with shared leadership responsibilities. After the hospital transitioned to a national anesthesia provider, he continued as Director of Anesthesia. Recognizing his leadership and business expertise, the hospital later requested that he form his own anesthesia group, leading to the creation of POSM.
The vision of POSM is to empower all team members, both MDs and CRNAs, to fully maximize their roles within the organization. Leadership positions are intentionally distributed among both groups to foster a collaborative and inclusive environment.
Chief CRNA Mark Fisher, a founding member of POSM, has been instrumental in shaping the organization’s culture, which has been a key driver of its success and growth. In addition to Fisher, POSM has a strong leadership team across various roles, all dedicated to upholding and advancing the company’s proven culture of excellence.
Since its founding, POSM has grown significantly and now provides anesthesia services to five entities.
Our mission
“To promote a culture of perioperative excellence, efficiency, and safety through teamwork and innovation, ensuring the highest quality care for the patients and partners we serve.”
Perioperative Services of Mississippi (POSM) provides high-quality anesthesia services across the state of Mississippi. Dedicated to patient safety and efficiency,
POSM actively participates in every stage of the surgical experience, from preoperative screening to intraoperative best practices and streamlined postoperative recovery.