Meet The Team

Neurosurgeon 

Dr. Samuel D. Critides

Dr. Critides served in the United States Navy for 20 years. After serving as a battalion surgeon with the United States Marines, he was selected for training as a neurosurgeon. He then served the remainder of his career in the Navy as a neurosurgeon, including tours at National Naval Medical Center Bethesda, Naval Medical Center Portsmouth and Wounded Warrior Regiment in Quantico, Virginia. While assigned to National Naval Medical Center Bethesda, he was called to treat U.S. servicemen and women injured in the Iraq and Afghanistan conflicts. He deployed as the spine surgeon on the USNS Comfort, the forward deployed mobile Naval Hospital Ship, where he provided care for victims of the Haiti earthquake in 2010. After his time in the Navy, Dr. Critides wanted to help to continue to serve our military community, so Homeport Neurosurgery was created. Since 2021, Dr. Critides has returned to the beautiful Emerald Coast, choosing to serve his local community as well as active duty and retired service members. In his spare time, Dr. Critides stays active with cross fit and running. He enjoys spending time with his wife, Maricarmen, their four children, and his dogs. Dr. Critides is the Chief of Surgery at HCA Fort Walton Beach - Destin hospital.

Neurosurgeon 

Dr. Christopher Meredith

Coming Fall 2026

Dr. Meredith grew up in Amsterdam, the Netherlands, and brings a global perspective to his medical practice. He moved to the United States to attend Wesleyan University in Connecticut, where he majored in neuroscience and graduated Phi Beta Kappa in 1996. He earned his medical degree from the University of Connecticut School of Medicine in 2000, followed by an internship and neurosurgical residency at the University of Kansas Hospital, which he completed in 2006. Dr. Meredith has since dedicated his career to providing thoughtful, patient-centered spine care, with special clinical interests in adult degenerative spinal disorders, motion-preservation surgery, and endoscopic spine surgery. In addition to his medical training, Dr. Meredith pursued legal studies and earned his Juris Doctor from Mitchell Hamline School of Law in 2023, further strengthening his ability to advocate for patients and navigate the complex intersection of medicine and law. Outside of his professional life, Dr. Meredith is a devoted father to two sons, ages 11 and 13. He enjoys traveling, running, and maintaining an active lifestyle. He is fluent in Dutch and French, allowing him to connect with patients from diverse backgrounds. Dr. Meredith is known for his calm, approachable demeanor and his commitment to helping patients feel informed, supported, and confident throughout their care.

Neurosurgeon 

Dr. Robert Lynagh

Coming Fall 2026

Dr. Robert Lynagh is a board-certified neurosurgeon specializing in minimally invasive, robotic-assisted, and endoscopic spine surgery. He has extensive experience treating degenerative spine conditions, complex revision spine surgery, and patients with persistent pain after previous procedures. He also provides comprehensive general neurosurgical care, including the treatment of brain tumors, cranial disorders, and peripheral nerve conditions.

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Dr. Lynagh earned his medical degree from the Chicago College of Osteopathic Medicine at Midwestern University and completed his neurosurgical residency at the Philadelphia College of Osteopathic Medicine. He previously practiced at St. Vincent Healthcare in Billings, Montana, where he helped build one of the region's busiest spine programs, and at Trinity Health in Muskegon, Michigan, where he also served as an Assistant Professor at Michigan State University College of Osteopathic Medicine. His expertise in robotic spine surgery has been featured on regional news outlets in both Michigan and Montana.

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Known for his patient-centered approach, Dr. Lynagh believes the best outcomes come from combining evidence-based medicine with individualized care. He takes the time to identify the true source of each patient's pain before developing a personalized treatment plan, emphasizing conservative therapies and the least invasive surgical options whenever possible.

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Dr. Lynagh and his family were drawn to the Emerald Coast by its natural beauty and active lifestyle, as well as Homeport's commitment to compassionate, personalized care. Outside the operating room, he enjoys golfing, fly fishing, and spending time with his wife and two daughters.

Nurse Practitioner

Amberlyn McNamara, AGNP – C

​Amberlyn McNamara is a board-certified Adult Gerontology Nurse Practitioner by the

American Academy of Nurse Practitioners Certification Board. As an NP, Amberlyn has

worked in the urgent care setting in Hawaii and was a part of the anesthesia team in the

perioperative setting to medically optimize patients prior to undergoing surgery at

Barnes Jewish Hospital in St. Louis, MO. Prior to obtaining her NP degree, Amberlyn

received a BS in Mathematics and Nursing. She spent most of her time as a bedside

nurse on a neuro step down unit and began travel nursing during the Covid19 pandemic.

Amberlyn is passionate about providing patient centered holistic care to those while

they are in their most vulnerable state. She loves spending time with her husband

Josh and their daughter. She was a four-year collegiate athlete playing volleyball at

Virginia Wesleyan University and now enjoys playing beach volleyball, all things

physical fitness, and being outdoors.

Nurse Practitioner

Amanda Imperato AGACNP-BC

Amanda is a board-certified Adult-Gerontology Acute Care Nurse Practitioner specializing in neurosurgery and spine care. She completed her Master of Science in Nursing at Vanderbilt University and has a clinical background in trauma intensive care and neurocritical care.

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Prior to becoming a nurse practitioner, Amanda served as an Engineer Officer in the United States Army at Fort Bragg, North Carolina (Airborne!) where she held multiple leadership roles, including Company Commander. Her military background continues to influence her approach to patient care through resilience, teamwork, adaptability, and compassion.

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Amanda is passionate about helping patients recover after neurological injury and surgery and finds fulfillment in seeing patients regain independence and return to living meaningful, active lives. She is committed to providing patient-centered care and supporting patients through every stage of recovery.

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Originally from Boston, Amanda now enjoys life along Florida’s Gulf Coast. Outside of work, she is a certified yoga teacher and enjoys country music, fitness, time on the water, and anything outdoors. She also loves spending time with her senior Belgian Malinois, Maisey.

Nurse Practitioner

Briana Toothaker FNP

Briana Toothaker is a board-certified Family Nurse Practitioner through the American Nurses Credentialing Center. She earned her Master of Science in Nursing from Thomas Jefferson University in Philadelphia, Pennsylvania.

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With more than 10 years of nursing experience, Briana has cared for surgical and spine patients at several leading medical centers, including the Hospital of the University of Pennsylvania, Emory in Atlanta, and Barnes-Jewish Hospital in St. Louis. As the spouse of a United States Air Force servicemember, she has gained diverse clinical experience through multiple military relocations.

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Briana later joined the Integrated Spine Surgery team at Barnes-Jewish Hospital as a nurse practitioner, caring for both neurosurgical and orthopedic spine patients. Her experience as both a registered nurse and nurse practitioner provides her with a unique perspective on the surgical journey, allowing her to support patients through every stage of care.

She is passionate about building trusting relationships, listening to her patients, and helping them navigate treatment with confidence while working toward the best possible outcomes.

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Outside of work, Briana enjoys spending time with her husband, their two sons, and their black lab mix, Dexter. She also enjoys reading, traveling, hiking, and spending time at the beach.

Physician Assitant

Sarah Webb PA-C

Coming Fall 2026

Sarah is a Physician Assistant who earned her Master of Medical Science in Physician Assistant Studies from Mercer University. Her clinical training included experience in surgical and emergency medicine settings, where she developed a strong foundation in perioperative care, procedural medicine, and patient management.

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During her surgical training, Sarah participated in operative cases, postoperative rounds, and clinic evaluations, gaining hands-on experience with suturing, wound closure, incision management, and the continuum of care from preoperative evaluation through postoperative recovery. Her emergency medicine experience further strengthened her procedural skills and ability to provide focused, collaborative care in fast-paced clinical environments.

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Sarah is passionate about surgical medicine and values clear communication, patient education, and a team-based approach to care. She is excited to serve patients throughout Fort Walton Beach and the Emerald Coast as part of the Homeport Neurosurgery & Spine team.