Healthcare providers in Ontario, CA
6,236 active NPIs list a practice location in Ontario, CA: 5,520 individual providers and 716 organizations, in 238 specialties. Choose a specialty to see its providers.
Most common specialties
- Behavior Technician2,912
- Behavior Analyst375
- Marriage & Family Therapist183
- Student in an Organized Health Care Education/Training Program175
- Clinical Social Worker152
- Assistant Behavior Analyst124
- Speech-Language Pathologist106
- Addiction (Substance Use Disorder) Counselor104
- General Practice Dentistry92
- Pharmacist90
- Speech-Language Assistant88
- Mental Health Counselor86
All specialties
- Acupuncturist16
- Acute Care Nurse Practitioner1
- Addiction (Substance Use Disorder) Counselor104
- Addiction (Substance Use Disorder) Psychologist1
- Administrator Registered Nurse1
- Adolescent and Children Mental Health Clinic/Center3
- Adult Care Home Facility1
- Adult Companion3
- Adult Day Care Clinic/Center2
- Adult Health Nurse Practitioner2
- Adult Mental Health Clinic/Center3
- Air Ambulance1
- Ambulance1
- Ambulatory Surgical Clinic/Center7
- Anatomic Pathology & Clinical Pathology Physician1
- Anesthesiology Physician4
- Assistant Behavior Analyst124
- Assisted Living Facility7
- Athletic Trainer9
- Attendant Care Provider5
- Audiologist1
- Behavior Analyst375
- Behavior Technician2,912
- Cardiovascular Disease Physician1
- Case Management Agency7
- Case Manager/Care Coordinator42
- Certified Registered Nurse Anesthetist1
- Certified Respiratory Therapist6
- Child & Adolescent Psychiatric/Mental Health Registered Nurse1
- Chiropractor45
- Clinic/Center14
- Clinical Child & Adolescent Psychologist1
- Clinical Exercise Physiologist1
- Clinical Medical Laboratory11
- Clinical Neuropsychologist2
- Clinical Nurse Specialist1
- Clinical Psychologist13
- Clinical Social Worker152
- Community Based Hospice Care Agency35
- Community Health Clinic/Center4
- Community Health Registered Nurse2
- Community Health Worker67
- Community/Behavioral Health Agency13
- Community/Retail Pharmacy17
- Compounding Pharmacy1
- Contractor2
- Corneal and Contact Management Optometrist1
- Counseling Psychologist3
- Counselor32
- Critical Care Medicine Registered Nurse1
- Customized Equipment (DME)1
- Day Training/Habilitation Specialist12
- Dental Assistant4
- Dental Clinic/Center24
- Dental Hygienist4
- Dental Laboratory1
- Dentist81
- Dermatology Physician1
- Developmental Therapist1
- Diagnostic Radiology Physician5
- Doula21
- Driver4
- Durable Medical Equipment & Medical Supplies46
- Early Intervention Provider Agency2
- Electroneurodiagnostic Specialist/Technologist2
- Emergency Medicine Physician1
- Emergency Registered Nurse2
- Emotionally Disturbed Childrens' Residential Treatment Facility3
- End-Stage Renal Disease (ESRD) Treatment Clinic/Center7
- Endodontics2
- Exclusive Provider Organization2
- Eyewear Supplier5
- Facial Plastic Surgery Physician1
- Family Medicine Physician38
- Family Nurse Practitioner55
- Federally Qualified Health Center (FQHC)5
- Foot & Ankle Surgery Podiatrist13
- General Acute Care Hospital2
- General Practice Dentistry92
- General Practice Physician13
- General Practice Registered Nurse1
- Geriatric Medicine (Internal Medicine) Physician2
- Health & Wellness Coach68
- Health Educator8
- Health Maintenance Organization4
- Health Service Clinic/Center7
- Health Service Psychologist1
- Hearing Aid Equipment1
- Hearing and Speech Clinic/Center4
- Hearing Instrument Specialist2
- Home Health Agency36
- Home Health Aide1
- Home Infusion Therapy Pharmacy1
- Hospice Registered Nurse1
- Hospitalist Physician1
- In Home Supportive Care Agency14
- Independent Medical Examiner Chiropractor1
- Infusion Therapy Registered Nurse2
- Institutional Pharmacy1
- Intellectual and/or Developmental Disabilities Residential Treatment Facility7
- Intellectual Disabilities Intermediate Care Facility3
- Internal Medicine Physician14
- Internist Chiropractor1
- Interpreter1
- Lactation Consultant (Non-RN)1
- Legal Medicine2
- Legal Medicine (M.D./D.O.) Physician1
- Licensed Practical Nurse1
- Licensed Psychiatric Technician11
- Licensed Vocational Nurse28
- Local Education Agency (LEA)6
- Lodging Provider2
- Long Term Care Hospital1
- Long Term Care Pharmacy4
- Magnetic Resonance Imaging Radiologic Technologist1
- Marriage & Family Therapist183
- Massage Therapist15
- Medical Physician Assistant8
- Medical Specialty Clinic/Center1
- Medical-Surgical Registered Nurse2
- Mental Health Clinic/Center (Including Community Mental Health Center)15
- Mental Health Counselor86
- Mental Health Occupational Therapist2
- Mental Illness Community Based Residential Treatment Facility1
- Metabolic Nutrition Registered Dietitian1
- Methadone Clinic2
- Midwife1
- Multi-Specialty Clinic/Center4
- Nephrology Physician4
- Neurological Surgery Physician1
- Neurology Physician2
- Non-emergency Medical Transport (VAN)30
- Non-Pharmacy Dispensing Site2
- Nurse Practitioner19
- Nurse's Aide1
- Nutrition Education Nutritionist1
- Obesity Medicine (Preventive Medicine) Physician1
- Obstetrics & Gynecology Nurse Practitioner1
- Obstetrics & Gynecology Physician2
- Occupational Health Chiropractor2
- Occupational Medicine Clinic/Center4
- Occupational Medicine Physician4
- Occupational Therapist29
- Occupational Therapy Assistant7
- Oncology Pharmacist1
- Ophthalmologic Surgery Clinic/Center1
- Ophthalmology Physician2
- Optometrist33
- Oral and Maxillofacial Surgery Clinic/Center1
- Orthodontics and Dentofacial Orthopedics Dentistry3
- Orthopaedic Hand Surgery Physician1
- Orthopaedic Surgery Physician9
- Orthopedic Chiropractor2
- Orthopedic Physical Therapist3
- Orthotic Fitter2
- Orthotist4
- Oxygen Equipment & Supplies (DME)2
- PACE Provider Organization1
- Pain Medicine (Physical Medicine & Rehabilitation) Physician1
- Paramedic1
- Parenteral & Enteral Nutrition Supplies (DME)2
- Pediatric Cardiology Physician2
- Pediatric Dentistry6
- Pediatric Nurse Practitioner2
- Pediatric Occupational Therapist7
- Pediatric Ophthalmology and Strabismus Specialist Physician1
- Pediatric Physical Therapist2
- Pediatrics Physician12
- Peer Specialist21
- Personal Care Attendant1
- Pharmacist90
- Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist4
- Pharmacotherapy Pharmacist1
- Pharmacy8
- Pharmacy Technician2
- Phlebotomy Technician1
- Physical Medicine & Rehabilitation Physician3
- Physical Therapist39
- Physical Therapy Assistant13
- Physical Therapy Clinic/Center3
- Physician Assistant39
- Physiological Laboratory1
- Plastic Surgery Physician1
- Podiatric Clinic/Center2
- Podiatrist4
- Point of Service1
- Preferred Provider Organization3
- Primary Care Clinic/Center5
- Primary Care Nurse Practitioner8
- Primary Podiatric Medicine Podiatrist2
- Private Vehicle3
- Professional Counselor6
- Prosthetic/Orthotic Supplier7
- Prosthodontics1
- Psychiatric Residential Treatment Facility1
- Psychiatric/Mental Health Nurse Practitioner22
- Psychiatric/Mental Health Registered Nurse6
- Psychiatry Physician12
- Psychologist13
- Public Health & General Preventive Medicine Physician1
- Public Health Dentistry1
- Public Health or Welfare Agency2
- Pulmonary Disease Physician1
- Radiation Oncology Physician1
- Radiology Clinic/Center1
- Registered Dietitian10
- Registered Nurse31
- Registered Respiratory Therapist4
- Rehabilitation Chiropractor1
- Rehabilitation Practitioner35
- Rehabilitation Psychologist1
- Religious Nonmedical Practitioner1
- Respite Care1
- Rheumatology Physician1
- School Counselor31
- School Psychologist16
- School Registered Nurse18
- School Social Worker1
- Skilled Nursing Facility11
- Social Worker40
- Specialist15
- Speech-Language Assistant88
- Speech-Language Pathologist106
- Sports Medicine (Emergency Medicine) Physician1
- Sports Medicine (Physical Medicine & Rehabilitation) Physician1
- Student in an Organized Health Care Education/Training Program175
- Substance Abuse Rehabilitation Facility1
- Substance Use Disorder Rehabilitation Clinic/Center1
- Supports Brokerage Agency1
- Surgery Physician7
- Surgical Physician Assistant1
- Taxi1
- Technician2
- Urgent Care Clinic/Center15
- Urology Physician2
- Vascular Surgery Physician2
- Voluntary or Charitable Agency2
- Women's Health Nurse Practitioner1