toggle mobile menu Menu
toggle search menu

Site Navigation

Supplemental

Menu

St. Luke's Clinic – Northwest Neurosurgery Associates: Meridian

Our team offers specialized treatments for issues related to the brain, spine, and peripheral nerves. These include minimally invasive spine surgery, brain and spine tumor surgery, peripheral nerve surgery, degenerative and reconstructive spine surgery, stereotactic surgery, deep brain stimulation (DBS), care for spine and cranial vascular disorders and trauma, and more. 

Our goal is to find the treatment option that’s best for you to achieve your most successful results and highest possible quality of life. 

Learn more about spine surgery
×

Schedule an Appointment
If you have a medical emergency, do not use online scheduling. Call 911 or proceed to your nearest emergency department. If you require immediate assistance for a non-emergency condition, please contact the clinic directly by phone.

Providers

  • Keri J. Barnes, NP

    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile
  • David P. Bray, MD

    David P. Bray, MD

    Neurosurgery

    Biography

    David P. Bray, MD, MSc is a fellowship-trained neurosurgeon specializing in minimally-invasive/endoscopic cranial base and spine surgery, neurosurgical oncology, and pituitary surgery. He works with a multidisciplinary team of oncologists, ENT surgeons, neurologists, and radiation oncologists. He has expertise in treating disorders of the skull base, including pituitary tumors, meningiomas, acoustic/vestibular schwannomas, cranial nerve disorders (trigeminal & glossopharyngeal neuralgia and hemifacial spasm), normal pressure hydrocephalus (NPH), as well as metastases to the brain and gliomas. Dr. Bray has expertise in treating patients with spine tumors and degenerative disease of the spine (neuroforaminal and spinal stenosis). He also performs radiosurgery where benign and malignant tumors of the brain are treated without incisions. 

    Dr. Bray graduated from the University of Notre Dame Magna Cum Laude where he was a double major in pre-medicine and history. When he graduated from medical school, he was an inductee in the Alpha Omega Alpha Honor Medical Society, an honor bestowed upon the highest achieving members of a medical school class. 

    During his fellowship training, he earned a master's degree in clinical research at the Emory Laney Graduate School through a grant issued by the National Institutes of Health (NIH). After residency, he completed a CAST-accredited fellowship in neurosurgical oncology and minimally invasive cranial base surgery at Thomas Jefferson University in Philadelphia. He has published numerous scientific articles in peer-reviewed medical journals and has presented at national neurosurgical meetings. 

    Dr. Bray is a member of the American Association of Neurological Surgeons, the Alpha Omega Alpha Honor Medical Society, the Congress of Neurological Surgeons, the North American Skull Base Society, and the Dr. Tom Dooley Society Medical Alumni of the University of Notre Dame. 

    In his free time, he enjoys reading literature, hiking, skiing, exercising, playing/watching sports, cooking, and spending time with his family.

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

    • Specialties, Conditions & Treatments

      See Less See More

  • Annie I. Campbell, PA-C

    Biography

    Annie Campbell PA-C is a board certified physician assistant experienced in bariatric and general surgery. She has worked in laparoscopic, robotic, and revisional surgery. It has been her life's work to assist patients in improving their health through weight loss, and those patients inspire her daily. 

    Annie earned her bachelor’s degree and master's degree in physician assistant studies both from Idaho State University. In her free time, she enjoys golfing, hiking, painting, and spending time with family.

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

  • Peyton M. Farrall, PA-C

    Biography

    Peyton Farrall, PA-C has clinical interests in conservative and surgical management of brain and spine conditions, utilizing a team-based approach to facilitate treatment plans, and ensuring patients receive compassionate and individualized care. 

    In her free time, Peyton enjoys reading, hiking, and pickleball. She is originally from Delaware, having moved to Idaho for school where she earned her master’s of physician assistant studies from Idaho State University.

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile
  • ""

    Gregory S. Harrison, MD

    Neurosurgery

    Biography

    Gregory S. Harrison, MD, FAANS specializes in complex spine surgery, brain tumor surgery, peripheral nerve surgery, and general neurosurgery. Before moving to Boise, he practiced in both the Minneapolis/St. Paul area and Pocatello, ID.

    Dr. Harrison earned his bachelor's degree at Yale University and completed his medical degree at Loyola University Chicago Stritch School of Medicine, graduating with Alpha Omega Alpha honors. After his neurosurgery residency at Cleveland Clinic Foundation, Dr. Harrison performed his fellowship at the Royal Melbourne Hospital in Australia, with a focus on brain tumors and skull base surgery.

    Surgical Specialties

    • Brain surgery
    • Spine surgery
    • Discectomy
    • Laminectomy
    • Cervical and lumbar fusion
    • Corpectomy

    Availability

    Accepting new patients
     

  • Lauren M. Henken, PA-C

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

  • Bennett B. Hofmeister, PA-C

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

  • Nicholas A. Hutt, PA-C

    Physical Medicine and Rehabilitation

    Biography

    Nicholas Hutt, PA-C earned his master's degree in physician assistant studies from Midwestern University and his bachelor's degree in anthropology from Idaho State University.

    Availability

    Accepting new patients
     

  • Cody A. Johnson, PA-C

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

  • Derek L. Martinez, MD

    Neurosurgery

    Biography

    Derek Martinez, MD, MS specializes in the treatment of a wide array of complex brain, spine, and peripheral nerve conditions. He has expertise in surgery for brain and spine tumors, complex spine care, radiosurgery, cerebral hemorrhages, artificial disc replacement, normal-pressure hydrocephalus (NPH), and general neurosurgery. He also performs surgery for neuromodulation and the treatment of movement disorders and epilepsy.

    Dr. Martinez is board certified by the American Board of Neurological Surgery. He is also a member of the Congress of Neurological Surgeons, the American Association of Neurological Surgeons, and the American Society for Stereotactic and Functional Neurosurgery. 

    Prior to his medical education, Dr. Martinez earned a bachelor's degree from Brigham Young University-Idaho and a master's degree in neuroscience from Brigham Young University.

    Surgical Specialties

    • Deep brain stimulation (DBS)
    • Epilepsy surgery
    • Stereotactic neurosurgery
    • Brain and pituitary tumors
    • Spine tumors
    • Complex spine surgery
    • Peripheral nerve surgery

    Availability

    Accepting new patients
     
  • Benjamin McGahan, MD

    Benjamin G. McGahan, MD

    Neurosurgery

    Biography

    Ben McGahan, MD is a highly skilled neurosurgeon, specializing in minimally invasive brain and spine surgery using advanced techniques such as robotic-assisted spinal fusion and endoscopic spine surgery. His expertise encompasses a wide range of spinal conditions, including spinal stenosis, disc herniations, spinal trauma and infections, complex spinal deformities, and spinal tumors. Dr. McGahan also treats brain tumors, traumatic brain injuries, hydrocephalus, facial pain and spasms, and Chiari malformations. 

    Dr. McGahan is known for his patient-centered approach, ensuring that each patient receives personalized, compassionate care tailored to their specific needs. He believes in clear communication and works closely with patients to develop the best treatment plans. Dr. McGahan is also involved in community health initiatives, reflecting his dedication to the well-being of his community. 

    During his residency at The Ohio State University, Dr. McGahan distinguished himself through a high volume of surgeries and significant research contributions. His work on reducing wound infections, improving skull base surgery visualization, and reviewing non-operative back pain management has been published in leading medical journals, underscoring his commitment to advancing the field of neurosurgery. 

    Dr. McGahan lives in Boise with his wife and two children. He values family and understands the importance of work-life balance, which he incorporates into his compassionate care philosophy.

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

    • Specialties, Conditions & Treatments

      See Less See More

  • Alec M. Meyerhoeffer, PA-C

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

  • Hayley C. Piepmeyer, PA-C

    Biography

    Hayley C. Piepmeyer, PA-C worked in orthopedic surgery prior to taking on her new role in neurosurgery. 

    Hayley earned her degree in physician assistant studies from the Massachusetts College of Pharmacy and Health Sciences, and a master's degree in exercise physiology from the University of Wisconsin-Madison.

    Originally from Boise, Hayley enjoys spending free time with her family, playing sports with her kids, hiking, river rafting, and gardening.


    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile
  • Travis Wahl, PA-C

    Travis S. Wahl, PA-C

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

  • Stephen M. Wren, PA-C

    Availability

    Accepting new patients
     
    • St. Luke's Health Partner
      St. Luke's Health Partner

      These providers work together to achieve patient-centered care, using proven best practices to offer better care to you and your family.

      see full profile

Procedures & Treatments

  • Deep Brain Stimulation

    Deep brain stimulation (DBS) is a therapy that can improve quality-of-life when medication cannot be further optimized.

North American Skull Base Society Recognition

North American Skull Base Society Recognition

St. Luke's Neurosurgery a Team of Distinction

St. Luke’s neurosurgery has earned recognition as a Multidisciplinary Team of Distinction from the North American Skull Base Society (NASBS). NASBS recognizes programs like St. Luke’s Neurosurgery that have multidisciplinary skull base surgery teams that include physicians in a variety of specialties.

Learn More about this Recognition

Access Your Mobile Medical Record Anytime, Anywhere

Access Your Mobile Medical Record Anytime, Anywhere

Sign up for a MyChart account today!

With MyChart, you’re able to view test results, contact your provider, request medication refills, schedule appointments and more. We encourage you to sign up for easy access to the tools and information you need to proactively manage your health. You can also set up online proxy access requests for medical records of children, spouses, or dependents.


There's also an easy-to-use MyChart app available for your mobile devices!

Learn more about MyChart

Protect Your Health

Your Partner in Health.

People are at the heart of great health care. That's why we are committed to delivering compassionate, high-quality care tailored to the communities we serve. 


Together with our community partners and patients, we're building a stronger, healthier future for all Idahoans.

Connect with Us
Contact Us In Boise (208) 381-2222