William J. Cohn, M.D. 3400 Nesconset Highway East Setauket NY 11733 GastroenterologySearch By Practice Type Specialty: Select an area of practice:Allergy, Asthma & ImmunologyAnesthesiologyBariatric Medicine / SurgeryBreast SurgeryCardio Thoracic SurgeryCardiovascular DiseaseChiropractic CareColon & Rectal SurgeryCritical Care / PulmonologyDermatologyEar Nose and Throat (Otolaryngology)Endocrinology, Diabetes & MetabolismFacial Plastic SurgeryFamily PracticeGastroenterologyGeneral SurgeryGeriatric MedicineInfectious DiseaseInternal MedicineNephrologyNeurological Surgery (Brain & Spine)NeurologyOB/GynOncology / HematologyOphthalmologyOrthopedic SurgeryPain Management/P M & RPediatric CardiologyPediatric EndocrinologyPediatric Infectious DiseasePediatric NephrologyPediatric Neurology & Child DevelopmentPediatric Oncology / HematologyPediatric Orthopedic SurgeryPediatric PulmonologyPediatric SurgeryPediatricsPhysical Medicine / PhysiatryPlastic / Cosmetic SurgeryPodiatryPsychiatryPsychologyRadiation OncologyRadiologyReproductive MedicineRheumatologySpinal SurgerySports MedicineUrgent Care / Emergency MedicineUrologyVascular Surgery County: Select a county:AlbanyAlleganyBronxBroomeCattaraugusCayugaChautauquaChemungChenangoClintonColumbiaCortlandDelawareDutchessErieEssexFranklinFultonGeneseeGreeneHamiltonHerkimerJeffersonKingsLewisLivingstonMadisonMonroeMontgomeryNassauNew YorkNiagaraNULLOneidaOnondagaOntarioOrangeOrleansOswegoOtsegoPutnamQueensRensselaerRichmondRocklandSaint LawrenceSaratogaSchenectadySchoharieSchuylerSenecaSteubenSuffolkSullivanTiogaTompkinsUlsterWarrenWashingtonWayneWestchesterWyomingYates SearchPlease Select A Practice Area and CountySearch Settings Doctor or Practice Name: SearchPlease Enter A Name