TOP 10 Psychiatrists near me in New City, New York
307 results found
Search for local businesses, places and services near you
- United States
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
- Ukraine
- Italy
- Poland
- Germany
-
Psychiatric Group of Albany
● OpenThe Psychiatric Group of Albany is a leading mental health institution located at 260 South Pearl Street in Albany, New York. Our team of experienced psychiatrists and mental health professionals provide comprehensive and compassionate care to individuals struggling with a wide range of mental health issues. We offer a variety of treatment options including therapy, medication management, and holistic approaches to help our patients achieve mental wellness. Our dedicated staff is committed to providing personalized care in a safe and supportive environment. Contact us today to schedule a consultation and take the first step towards better mental health.
260 S Pearl St, Albany, NY 12202, United States -
Lawrence Dana, PHD
● OpenLawrence Dana, PHD is a health institution located at 4 Central Avenue in Albany, New York, United States. Specializing in providing customized therapy and treatment solutions, our licensed clinical professionals help individuals meet their mental health goals through professional therapy and medication management, both in-person and online. We treat a variety of mental health issues such as anxiety, depression, adjustment disorders, psychosis, and behavioral disturbances, as well as provide cognitive and behavioral interventions for medical problems like non-compliance, hypertension, chronic pain, diabetes, cancer, and obesity. Since 1994, we have been a multispecialty group dedicated to increasing access to mental health services and reducing the stigma surrounding mental health conditions. With over 600 mental health providers, including psychiatrists, psychologists, nurse practitioners, licensed clinical social workers, counselors, and marriage & family therapists, we are the premier employer of W2 employed mental health professionals in the United States.
4 Central Ave, Albany, NY 12210, United States -
Brad A. Arisohn, PhD
● OpenBrad A. Arisohn, PhD is a health institution located at 4 Central Avenue, Albany, New York, United States. They specialize in providing customized therapy and treatment solutions for individuals seeking help with mental health issues. Their licensed clinical professionals offer therapy and medication management both in-person and online, treating conditions such as anxiety, depression, psychosis, and behavioral disturbances. Since 1994, Brad A. Arisohn, PhD has been dedicated to increasing access to mental health services and reducing the stigma surrounding mental health conditions. With a team of over 600 psychiatrists, psychologists, nurse practitioners, social workers, counselors, and therapists, they are a leading employer of mental health providers in the United States.
4 Central Ave, Albany, NY 12210, United States -
David Shaffer, MD, PhD
● OpenDavid Shaffer, MD, PhD is a renowned doctor and health institution located at 43 New Scotland Avenue in Albany, New York, United States. Dr. Shaffer is a highly qualified physician with both medical and research expertise, making him a trusted healthcare provider in the community. Patients can expect top-notch medical care and personalized treatment plans at this institution.
43 New Scotland Ave, Albany, NY 12208, United States -
Memorial Sloan Kettering Cancer Counseling Center
● OpenMemorial Sloan Kettering Cancer Counseling Center, located at 160 East 53rd Street in New York, is dedicated to changing the way the world understands and treats cancer. Our team of scientists conducts cutting-edge research in all aspects of cancer, from genetics to treatment development. We are committed to training the next generation of clinicians and scientists to be leaders in cancer care and research. Our center is open Monday through Friday from 8 a.m. to 6 p.m. and offers services for individuals, couples, and families affected by cancer. Our expert counselors, including psychiatrists and psychologists, provide support to patients during their hospital stay and beyond. We welcome all individuals receiving care at MSK, as well as their family, caregivers, and friends.
160 E 53rd St, New York, NY 10022, United States -
Daniel Brown, PHD
● OpenDaniel Brown, PHD is a health institution located at 4 Central Avenue, Albany, New York, United States. Our team of licensed clinical professionals is dedicated to providing customized therapy and treatment solutions to help individuals meet their mental health goals. We offer therapy and medication management both in-person and online. Our professionals treat a range of mental health issues including anxiety, depression, adjustment disorders, psychosis, and behavioral disturbances. We also provide cognitive and behavioral interventions for medical problems such as non-compliance, hypertension, chronic pain, diabetes, cancer, and obesity.
4 Central Ave, Albany, NY 12210, United States -
Rebecca Fromme, PHD
● OpenRebecca Fromme, PHD is a health institution located at 4 Central Avenue, Albany, New York, United States. Our team of licensed clinical professionals provides customized therapy and treatment solutions to help individuals meet their mental health goals. We offer professional therapy and medication management both in-person and online. Our services include treating problems such as anxiety, depression, adjustment disorders, psychosis, and behavioral disturbances. We also provide cognitive and behavioral interventions for medical issues like non-compliance, hypertension, chronic pain, diabetes, cancer, and obesity.
4 Central Ave, Albany, NY 12210, United States -
Psychiatry
● OpenPsychiatry is a specialized health institution located at 339 Hicks Street in New York, United States. It offers comprehensive mental health services and treatment for individuals dealing with a wide range of psychiatric disorders and conditions. The institution is staffed with highly trained psychiatrists, psychologists, and therapists who provide personalized care and support to help patients improve their mental well-being. With a focus on evidence-based practices and innovative treatment approaches, Psychiatry is dedicated to helping individuals achieve optimal mental health and overall wellness.
339 Hicks St, Brooklyn, NY 11201, United States -
Dr. Anthony Termine, MD
● ClosedDr. Anthony Termine, MD is a reputable medical institution located at 177 Prince Street in New York, New York, United States. As a trusted doctor, Dr. Termine provides top-notch healthcare services to patients of all ages. With a focus on personalized care and a commitment to excellence, Dr. Termine offers a wide range of medical services to help individuals maintain their health and well-being. Patients can expect compassionate and professional care in a welcoming and comfortable environment. Visit Dr. Anthony Termine, MD for all your healthcare needs.
177 Prince St Suite# 203, New York, NY 10012, United States -
Adult Psychiatry - Champlain Valley Physicians Hospital
● OpenAdult Psychiatry at Champlain Valley Physicians Hospital is a renowned mental health institution located in Plattsburgh, New York. Our team of dedicated professionals provides comprehensive psychiatric care for adults dealing with a wide range of mental health issues. From mood disorders to anxiety, our expert staff offers personalized treatment plans to help patients achieve optimal mental wellness. With a focus on compassionate care and evidence-based practices, Adult Psychiatry at Champlain Valley Physicians Hospital is committed to supporting our patients on their journey towards improved mental health.
75 Beekman St, Plattsburgh, NY 12901, United States -
Dr. Kevin N. Gitlin, MD
● OpenDr. Kevin N. Gitlin, MD is a reputable medical institution located at 3 Cumberland Avenue in Plattsburgh, New York. Dr. Gitlin is a highly skilled and experienced doctor who specializes in providing top-quality healthcare services to his patients. Whether you need a routine check-up, treatment for a specific medical condition, or guidance on maintaining a healthy lifestyle, Dr. Gitlin and his team are dedicated to providing personalized care to meet your individual needs. With a focus on patient well-being and a commitment to excellence, Dr. Kevin N. Gitlin, MD is the trusted choice for your healthcare needs in the Plattsburgh area.
3 Cumberland Ave, Plattsburgh, NY 12901, United States -
WNY Childrens Psychiatric
● OpenWNY Children's Psychiatric is a leading mental health institution located at 200 East 3rd Street in Jamestown, New York, United States. Our dedicated team of professionals specializes in providing comprehensive psychiatric care for children and adolescents. We offer a range of services including evaluation, diagnosis, and treatment for a variety of mental health conditions. Our goal is to support the emotional well-being and mental health of young individuals, helping them to thrive and reach their full potential. With a compassionate and experienced staff, WNY Children's Psychiatric is committed to providing high-quality care in a safe and supportive environment.
200 E 3rd St # 5, Jamestown, NY 14701, United States -
TRC Community Health Center Counseling & Psychiatric Services
● ClosedTRC Community Health Center Counseling & Psychiatric Services is a leading institution located at 880 East 2nd Street in Jamestown, New York, United States. We are dedicated to providing comprehensive mental health services to individuals in need. Our team of experienced counselors and psychiatrists offer a wide range of therapy and treatment options to address various mental health concerns. Whether you are seeking individual counseling, couples therapy, or psychiatric medication management, our compassionate and skilled professionals are here to support you on your journey to mental wellness. Visit us today to take the first step towards a healthier mind and a happier life.
880 E 2nd St, Jamestown, NY 14701, United States -
Delia W. Goldberg, LMHC
● OpenDelia W. Goldberg, LMHC is a multidisciplinary institution located at 64 Jefferson Street in Monticello, New York, United States. The institution offers a range of mental health services provided by a team of experienced professionals. The office staff includes Angie L., Paige H., Stephanie D., Nicole S., Nanci L., and Carmen L. Dr. Peter J. Panzarino, a Board Certified Psychiatrist, leads the team with his extensive experience in the field. He is joined by Dr. Thandar Win, Dr. Phone M. Win, Joan Bolles, Elizabeth Carrasquillo, Jennifer M. Smith, Marie Nadine Leonty, Mitchell Fishler, and Megan, who are all dedicated to providing high-quality care to individuals and families in need.
64 Jefferson St, Monticello, NY 12701, United States -
Being Health
● ClosedBeing Health is a psychiatrist-led mental health practice located at 76 Beaver Street in New York, United States. Our integrated mental health care is designed to help you feel better and function better, addressing both the mind and body. Our expert team of clinicians offers personalized care plans tailored to your unique needs, drawing upon a diverse set of tools and treatments. From psychiatric assessments to psychotherapy, functional medicine, and wellness services, we are dedicated to helping you make progress towards feeling better. Our board certified psychiatrists, psychotherapists, nurse anesthetists, nutritionists, care advocates, acupuncturists, and psychiatric NPs work together to provide comprehensive care and support. Whether you visit us in person or virtually, our goal is to help you step into a better state of being and find a path towards improved mental and physical health. Let's work together to help you feel better and live a more fulfilling life.
76 Beaver St 18 FL, New York, NY 10005, United States -
League School
● OpenLeague School, located in Brooklyn, New York, is part of the League Education & Treatment Center. Our school follows New York State learning standards and is staffed by state certified special education teachers. We offer a tailored curriculum to meet the individual academic needs of each student, including subjects such as English Language Arts, Mathematics, Science, Health, Social Studies, the Arts, Vocational Training, and Technology. In addition, we provide unique programs in gardening, culinary arts, and basketball. Our clinical services include speech and language therapy, occupational therapy, social skills development, behavior management, psychiatry, individual and group therapy, and conflict resolution. All of our staff are highly trained professionals and licensed in New York State. League School operates under a milieu treatment model, with all service providers working collaboratively to support students' individual needs.
567 Kingston Ave, Brooklyn, NY 11203, United States -
JOY CLINIC - Joy Psychiatry, PLLC | NY & NJ
● ClosedJoy Clinic - Joy Psychiatry, PLLC is a trusted institution located at 545 Saw Mill River Road, Ardsley, New York, United States. Dr. Hande Omur, a board-certified adult psychiatrist with expertise in ADHD, anxiety, depression, and PTSD, leads this institution. The clinic offers online therapy sessions for those who may have time constraints, physical challenges, or prefer the privacy of virtual appointments. Dr. Omur is praised for her compassionate and effective approach to treatment, as evidenced by the glowing reviews from satisfied patients. The Joy-Letter provides valuable insights and resources for emotional well-being. Dr. Omur's dedication to her patients' mental health shines through in her commitment to providing a safe and supportive space for healing.
545 Saw Mill River Rd #3e, Ardsley, NY 10502, United States -
Greene Clinic #2
● OpenGreene Clinic #2 is a branch of the Greene Clinic located at 574 Atlantic Avenue in New York, United States. As a sliding scale psychotherapy practice based in Fort Greene, Brooklyn, our diverse team of psychologists, social workers, counselors, and psychiatrists offer high-quality mental health care services. These services include individual therapy for adults and children, relationship therapy, group therapy, and psychological assessment. Our mission at Greene Clinic #2 is threefold: 1. To make psychodynamic psychotherapy accessible to all, regardless of financial means. We are committed to promoting racial, sexual, and economic justice by offering a broad sliding scale for treatment fees. We also provide specialized care for individuals with marginalized identities.
574 Atlantic Ave 2nd floor, Brooklyn, NY 11217, United States -
Clearwave Mental Health - Psychiatric and TMS Center
● ClosedClearwave Mental Health - Psychiatric and TMS Center is a leading institution located at 25 Smith Street in Nanuet, New York, United States. Our practice, formerly known as Riverview Psychiatric Medicine and TMS Center of the Hudson Valley, is dedicated to providing compassionate, personalized, and innovative mental health treatment to our community. Under the leadership of Medical Director, Dr. Randy I. Pardell, MD, DLFAPA, who has been serving the Hudson Valley community since 1996, Clearwave Mental Health offers cutting-edge mental health and anxiety treatment strategies. We are proud to be the first in the Hudson Valley and New York State to offer Transcranial Magnetic Stimulation (TMS Therapy) – a non-invasive treatment for drug-resistant depression, anxiety, OCD, and more.
25 Smith St Unit 314, Nanuet, NY 10954, United States -
Rockland Psychiatric Center: Nussbaum Alan C MD
● OpenRockland Psychiatric Center: Nussbaum Alan C MD is a healthcare institution located at 140 Old Orangeburg Road in Orangeburg, New York. Dr. Nussbaum is a licensed psychiatrist who specializes in providing mental health services to patients in need. With a focus on compassionate care and evidence-based treatment approaches, patients can expect to receive personalized care to address their unique needs. The facility offers a welcoming and comfortable environment for individuals seeking psychiatric help.
140 Old Orangeburg Rd #6, Orangeburg, NY 10962, United States -
Inclusive Psychiatry
● OpenInclusive Psychiatry is a leading healthcare institution located at 271 South Broadway in Nyack, New York, United States. Our dedicated team of psychiatrists and mental health professionals are committed to providing comprehensive and compassionate care to individuals of all backgrounds and identities. We believe in creating a safe and inclusive environment where everyone can receive the support and treatment they need to improve their mental health and well-being. Our services include individual therapy, medication management, group therapy, and more. At Inclusive Psychiatry, we strive to promote mental health equity and empower our patients to lead fulfilling lives.
271 S Broadway, Nyack, NY 10960, United States -
Jack Martin Fund Clinic
● ClosedThe Jack Martin Fund Clinic, located in New York City, is a leading institution in the treatment of HIV and AIDS. Our expert physicians provide individualized care using the latest medical advancements, combining treatment, research, and preventive education. As part of the Icahn School of Medicine at Mount Sinai, patients have access to state-of-the-art knowledge and technology only available through a major academic medical center. Our comprehensive care approach includes primary care, mental health, and specialty practices, with a team of primary-care physicians, nurse practitioners, infectious disease specialists, nurses, and social workers. Patients also have access to Specialty Care at Mount Sinai, with referrals to specialists best suited to their needs.
17 E 102nd St 3rd floor, New York, NY 10029, United States -
Mount Sinai Hospital Adult Outpatient Psychiatry Clinic: 106th Street
● OpenThe Mount Sinai Hospital Adult Outpatient Psychiatry Clinic on 106th Street in New York City specializes in providing expert care for patients with schizophrenia and other psychotic disorders. Our team of highly trained psychiatrists and psychologists offers compassionate and comprehensive multidisciplinary treatment. We utilize antipsychotic medications to control symptoms and prevent relapses, carefully monitoring each patient's response to find the most effective medication with minimal side effects. Our psychologists also offer cognitive behavioral therapy for psychosis, a proven form of talk therapy for individuals experiencing psychotic symptoms. Our researchers at the Icahn School of Medicine at Mount Sinai are dedicated to identifying risk factors for psychosis and developing innovative approaches for prevention and treatment. Visit us at our other locations, including the 5th Avenue clinic, Mount Sinai Beth Israel clinic, and Mount Sinai Morningside clinic, all part of the Department of Psychiatry at the Icahn School of Medicine at Mount Sinai.
20 E 106th St 9th floor, New York, NY 10029, United States -
Greene Clinic
● ClosedThe Greene Clinic, located at 89 Fort Greene Place in New York, is a sliding scale psychotherapy practice dedicated to providing high-quality mental health care to individuals of all backgrounds. Our team of psychologists, social workers, counselors, and psychiatrists offer individual therapy for adults and children, relationship therapy, group therapy, and psychological assessment. At Greene Clinic, we prioritize accessibility and social justice, believing that everyone should have access to long-term psychotherapy regardless of financial means. Our sliding scale fees accommodate varying financial needs, and we offer specialized treatment for marginalized communities including BIPOC, LGBTQ , and immigrant individuals.
89 Fort Greene Pl 2nd floor, Brooklyn, NY 11217, United States -
South Beach Psychiatric Center
● OpenSouth Beach Psychiatric Center is a renowned mental health institution located at 777 Seaview Avenue in New York, United States. As a leading psychiatric hospital, we provide comprehensive and compassionate care to individuals struggling with mental health disorders. Our team of experienced psychiatrists, therapists, and nurses work together to create personalized treatment plans that address each patient's unique needs. At South Beach Psychiatric Center, we are dedicated to promoting mental wellness and helping individuals achieve their full potential.
777 Seaview Ave, Staten Island, NY 10305, United States -
Rockland Psychiatric Center: Ghani Muhammad MD
● OpenRockland Psychiatric Center: Ghani Muhammad MD is a reputable medical institution located at 140 Old Orangeburg Road in Orangeburg, New York, United States. Dr. Ghani Muhammad is a dedicated and experienced psychiatrist who provides top-quality mental health services to patients in need. With a focus on compassionate care and evidence-based treatments, Dr. Muhammad and his team offer a wide range of psychiatric services to address various mental health issues. Whether you are seeking therapy, medication management, or other forms of treatment, Rockland Psychiatric Center is committed to helping you achieve optimal mental well-being. Schedule an appointment today and take the first step towards a healthier mind and a brighter future.
140 Old Orangeburg Rd #6, Orangeburg, NY 10962, United States -
Children's Hospital-Montefiore: Bell Moshe MD
● OpenChildren's Hospital-Montefiore: Bell Moshe MD is a renowned pediatric healthcare institution located at 3415 Bainbridge Avenue in New York, United States. Dr. Bell Moshe is a trusted and experienced pediatrician who provides expert medical care for children of all ages. The hospital is equipped with state-of-the-art facilities and a dedicated team of healthcare professionals who are committed to ensuring the well-being and health of every child. Whether it's a routine check-up or a complex medical condition, families can trust Children's Hospital-Montefiore: Bell Moshe MD for exceptional pediatric care.
3415 Bainbridge Ave, Bronx, NY 10467, United States -
NYS Psychiatric Institute: Depression Evaluation Service
● ClosedThe NYS Psychiatric Institute's Depression Evaluation Service is a leading mental health institution located at 1051 Riverside Drive in New York, New York, United States. This specialized service offers comprehensive evaluations and treatment options for individuals struggling with depression. Our team of experienced psychiatrists, psychologists, and therapists work together to provide personalized care and support to help patients manage their symptoms and improve their overall well-being. Whether you are experiencing mild or severe depression, our dedicated staff is here to help you on your journey to recovery.
Herbert Pardes Building, 1051 Riverside Dr #3300, New York, NY 10032, United States -
Audrey Buxbaum, MD
● OpenAudrey Buxbaum, MD is a renowned medical institution located at 568 Broadway in New York, New York, United States. Dr. Audrey Buxbaum is a highly respected doctor specializing in providing top-quality healthcare services to patients. With a focus on personalized care and a commitment to excellence, Dr. Buxbaum and her team strive to ensure the well-being and health of each individual who walks through their doors. Whether you are in need of a routine check-up or more specialized medical attention, Audrey Buxbaum, MD is dedicated to providing compassionate and comprehensive care to all patients.
568 Broadway Suite 304, New York, NY 10012, United States -
Sex & Relationship Therapist: Stephen Snyder, MD
● ClosedSex & Relationship Therapist: Stephen Snyder, MD is a renowned institution located in New York City, specializing in providing expert guidance and therapy for individuals and couples seeking to improve their sexual and relationship health. Dr. Stephen Snyder is a board-certified psychiatrist with years of experience in helping clients navigate intimacy issues and improve communication in their relationships. The institution is dedicated to creating a safe and confidential space for clients to explore their concerns and work towards achieving a more fulfilling and satisfying sex life. Located at 170 West End Avenue, New York, New York, the institution offers personalized care and support to individuals and couples looking to enhance their sexual and emotional well-being.
170 West End Ave Apt 1e, New York, NY 10023, United States
People also searched for:
- Psychiatrists near me in Albany
- Psychiatrists near me in Amityville
- Psychiatrists near me in Ardsley
- Psychiatrists near me in Armonk
- Psychiatrists near me in Baldwin
- Psychiatrists near me in Bay Shore
- Psychiatrists near me in Beacon
- Psychiatrists near me in Brentwood
- Psychiatrists near me in Briarcliff Manor
- Psychiatrists near me in Bridgehampton
- Psychiatrists near me in Buffalo
- Psychiatrists near me in Carmel Hamlet
- Psychiatrists near me in Chappaqua
- Psychiatrists near me in Clinton
- Psychiatrists near me in Commack
- Psychiatrists near me in Cortlandt
- Psychiatrists near me in Dix Hills
- Psychiatrists near me in Dunkirk
- Psychiatrists near me in East Meadow
- Psychiatrists near me in Farmingville
- Psychiatrists near me in Fayetteville
- Psychiatrists near me in Fishkill
- Psychiatrists near me in Floral Park
- Psychiatrists near me in Garden City
- Psychiatrists near me in Goshen
- Psychiatrists near me in Great Neck
- Psychiatrists near me in Hawthorne
- Psychiatrists near me in Hempstead
- Psychiatrists near me in Huntington
- Psychiatrists near me in Huntington Station
- Psychiatrists near me in Jamestown
- Psychiatrists near me in Larchmont
- Psychiatrists near me in Levittown
- Psychiatrists near me in Lockport
- Psychiatrists near me in Long Beach
- Psychiatrists near me in Massapequa
- Psychiatrists near me in Melville
- Psychiatrists near me in Middletown
- Psychiatrists near me in Monticello
- Psychiatrists near me in Mount Kisco
- Psychiatrists near me in Nanuet
- Psychiatrists near me in New Hyde Park
- Psychiatrists near me in New Rochelle
- Psychiatrists near me in New Windsor
- Psychiatrists near me in New York
- Psychiatrists near me in Newburgh
- Psychiatrists near me in Nyack
- Psychiatrists near me in Oceanside
- Psychiatrists near me in Orangeburg
- Psychiatrists near me in Oyster Bay
- Psychiatrists near me in Pittsford
- Psychiatrists near me in Plattsburgh
- Psychiatrists near me in Port Chester
- Psychiatrists near me in Port Jefferson
- Psychiatrists near me in Poughkeepsie
- Psychiatrists near me in Rochester
- Psychiatrists near me in Rockville Centre
- Psychiatrists near me in Rye Brook
- Psychiatrists near me in Scarsdale
- Psychiatrists near me in Schenectady
- Psychiatrists near me in Setauket- East Setauket
- Psychiatrists near me in Shirley
- Psychiatrists near me in Sleepy Hollow
- Psychiatrists near me in Smithtown
- Psychiatrists near me in Southampton
- Psychiatrists near me in Stony Brook
- Psychiatrists near me in Suffern
- Psychiatrists near me in Syosset
- Psychiatrists near me in Syracuse
- Psychiatrists near me in Tarrytown
- Psychiatrists near me in Thornwood
- Psychiatrists near me in Utica
- Psychiatrists near me in Valley Stream
- Psychiatrists near me in West Babylon
- Psychiatrists near me in West Hempstead
- Psychiatrists near me in West Nyack
- Psychiatrists near me in West Seneca
- Psychiatrists near me in Westbury
- Psychiatrists near me in White Plains
- Psychiatrists near me in Williamsville
- Psychiatrists near me in Woodbury
- Psychiatrists near me in Yonkers
- Psychiatrists near me in Yorktown Heights
People also searched for:
List of local businesses, places and services in New York
⭐ business help 🔍 services ☎ phones 🕒 opening times ✍️reviews 🌍 addresses, locations 📷 photos