APD is affiliated with Upper Valley Neurology Neurosurgery (UVNN) in Lebanon, NH. The service includes three board certified neurosurgeons and four certified Physician Assistants. Upper Valley Neurology Neurosurgery is dedicated to providing direct patient access to its physicians who provide compassionate, high quality, and personalized care in private practice settings in Lebanon and New London, NH and Randolph, VT. Neurosurgeons from Dartmouth-Hitchcock Medical Center also see patients at APD. 


8:00 am - 4:00 pm
Monday through Friday

Locations and Contact

UVNN - Upper Valley Neurology Neurosurgery
Lake Sunapee Building
106 Hanover Street
Lebanon, NH 03766
(603) 448-0447

New London:
New London Hospital
273 County Road
New London, NH 03257
(603) 526-5408

UVNN Medical Staff


  • Neurosurgical procedures
  • Spine and back surgery
  • Craniotomies
  • Neck surgery
  • Carpal tunnel surgical repair

DHMC Affiliated Medical Staff at APD

  • Timothy Ryken, MD, MS
    Section Chief, Neurosurgery, Professor of Surgery, Geisel School of Medicine, Dartmouth-Hitchcock
  • Nathan Simmons, MD
    Associate Professor of Surgery, Geisel School of Medicine, Dartmouth-Hitchcock

Areas of focus:

  • General adult and pediatric neurosurgery
  • Tumors of the brain and spine
  • Disorders of the spine
  • Minimally invasive techniques
  • Image-guided therapies