Print Departments and specialties Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Departments that treat this condition General Internal Medicine Neurology Physical Medicine and Rehabilitation Psychiatry and Psychology Areas that research this condition Neurology Research Psychiatry and Psychology Research Doctors who treat this condition edit search filters Close Narrow your search By location Rochester, MN By last name active Find a doctor whose last name begins with the letter A A Find a doctor whose last name begins with the letter B B There are no doctors whose last name begins with the letter C C Find a doctor whose last name begins with the letter D D There are no doctors whose last name begins with the letter E E There are no doctors whose last name begins with the letter F F There are no doctors whose last name begins with the letter G G There are no doctors whose last name begins with the letter H H There are no doctors whose last name begins with the letter I I There are no doctors whose last name begins with the letter J J Find a doctor whose last name begins with the letter K K Find a doctor whose last name begins with the letter L L Find a doctor whose last name begins with the letter M M There are no doctors whose last name begins with the letter N N There are no doctors whose last name begins with the letter O O There are no doctors whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q There are no doctors whose last name begins with the letter R R There are no doctors whose last name begins with the letter S S Find a doctor whose last name begins with the letter T T There are no doctors whose last name begins with the letter U U There are no doctors whose last name begins with the letter V V There are no doctors whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X There are no doctors whose last name begins with the letter Y Y There are no doctors whose last name begins with the letter Z Z Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-1 out of 1 doctors available Last Name Initial: A Nicholas (Nick) D. Allen, M.D. Psychiatrist Rochester, MN Areas of focus: Electroconvulsive therapy, Depression, Bipolar disorder, Anxiety disorder, Drug addiction, Generalized anxiety disorder..., Substance abuse, Psychotic disorder, Somatic symptom disorder, Neurocognitive disorder, Delirium, Personality disorder Show more areas of focus for Nicholas (Nick) D. Allen, M.D. By Mayo Clinic Staff Request an appointment Diagnosis & treatment Oct. 14, 2022 Print Share on: FacebookTwitter Related Associated Procedures Urinalysis Products & Services Book: Mayo Clinic Family Health Book, 5th Edition Newsletter: Mayo Clinic Health Letter — Digital Edition Show more products and services from Mayo Clinic DeliriumSymptoms & causesDiagnosis & treatmentDoctors & departments Research: It's All About Patients CON-20371368 Patient Care & Health Information Diseases & Conditions Delirium