SITE MAP Welcome to the Practice About the Doctors Pieter A. Keuskamp, M.D. Ira J. Chernoff, M.D. Marc Chernoff, M.D. Amanda Pidgeon, PA-C Cynthia Price, NP-C Carol Markowitz, NP-C Meet the Staff New Patients Forms Billing and Insurance Authorizations Forms Regular New Patient Registration Forms Medicare New Patient Registration Forms NoFault New Patient Registration Forms Workers Compensation New Patient Registration Forms Terms of Use notice Hospitals St. Catherine of Siena Medical Center St. Charles Hospital & Rehab Center John T. Mather Memorial Hospital Brookhaven Hospital & Medical Center Peconic Bay Medical Center Mercy Medical Center Nassau University Medical Center Northshore University Hospital Winthrop Hospital Disorders News Brain Disorders Spinal Disorders Nerve Disorders Pain Alleviation Neuro-Oncology Brain Surgery General Information Brain Tumors Vascular Disease Hemorrhage Trauma Shunts Image Guided Surgery Biopsy Craniotomy Burrholes Gliadel Transsphenoidal Surgery Spine Surgery Procedures Cervical Spine Thoracic Spine Lumbar Spine Fusions Nerve Surgery Carpal Tunnel Release (Median Neuropathy) Ulnar Nerve Transposition (Ulnar Neuropathy) Nerve Biopsy Muscle Biopsy Nerve blocks   Pain Alleviation Pain Syndromes Chronic Pain Cancer Pain Who May Benefit? Treatment Spinal Cord Stimulation Intrathecal Pump Facet Joint Injections Epidural Steroid Injections Contact Us Directions/Maps Smithtown Stony Brook Hampton Bays Riverhead Mineola Home Search Site Map Notice of Privacy Practices Terms of Use