Dr. Daniel Marwil, MD

Daniel Marwil

Developmental-Behavioral Specialist, MD

Accepting new clients



Children (<12)
Teenagers (13 - 18)
Young adults / college students (18 - 24)

Specialties & expertise

  • Clinical diagnosis and treatment of ADHD (Attention-deficit/hyperactivity disorder)

Professional statement

Daniel Marwil, MD is a developmental behavioral specialist in private practice in Providence, RI. Trained as a developmental behavioral pediatrician, Dr. Marwil has seen patients with ADHD for over 20 years, including children, young adults, and adults. He sees children across the autistic spectrum, and sees adults for ADHD.  

Dr. Marwil received his MD at Michigan State University College of Human Medicine, and completed his residency at Rhode Island Hospital. He is a Clinical Instructor in Pediatrics at Brown University, and is affiliated with Rhode Island Hospital. 


Clinical diagnosis and treatment of ADHD (Attention-deficit/hyperactivity disorder) – Diagnosis consists of a straightforward one hour interview for adults, in which Dr. Marwil will review symptoms with the patient to reach a clinical diagnosis. For children and adolescents, ADHD evaluations consist of 2 one hour sessions, which include a developmental screening evaluation. Medical intervention and monitoring are provided if the patient is interested in medication, and referrals are made to therapists for talk therapy if preferred.


  • Aetna

  • Blue Cross Blue Shield

  • Brown University Student Insurance (First Health / Cigna)

  • Cigna

  • First Health

  • Harvard Pilgrim Health Care

  • Johnson & Wales University (United Health)

  • Providence College (United Health)

  • Tufts

  • United Health

  • RISD Student Insurance (United Health)

  • URI / University of Rhode Island Student Insurance (United Health)

Out-of-pocket fees

  • Initial evaluation: $150-200/session

  • Follow-up evaluation: $80-100/session

Message to clients

"For patients who are interested in medication for ADHD, I provide both initiation and follow up medication management. It is a dynamic process in which we begin with a certain medication and dosage, but that may change over time depending on the patient's response. It is a dynamic interaction between doctor and patient reviewing the individual's response, side effects, and trying to find a treatment plan that matches the individual the best."

Treatment approaches

Medication management

Education and work experience

Private practice, 1983 - Present
Brown University, Clinical Instructor in Pediatrics, 1983 – Present

Rhode Island Hospital, Developmental-Behavioral Pediatrics Fellowship
Rhode Island Hospital, Pediatrics residency

Michigan State University, MD
University of Michigan, BA in Psychology



Professional endorsements

How do you know this therapist? I have known Dan for over fifteen years. Dan and I and another developmental pediatrician have been meeting every few months for the last fifteen years. We meet to present information, journal articles and cases on various topics. We bring cases to discuss for diagnostic and management discussion. I have referred patients to him, including members of my own family. Dan is an excellent physician, as well as a kind and caring person.

Why would you recommend this therapist? I have been meeting with Dan for many years. I have had the opportunity to hear how he diagnoses and manages his patients. I have the utmost confidence in his ability. I would recommend him highly to anyone.

What topic(s) would you refer clients to this therapist for? ADHD, anxiety, depression, Autism Spectrum Disorder, OCD
— Catherine Labiak-Maher M.D. Developmental/ Behavioral Pediatrician (2016)
Why would you recommend this therapist? Dr. Marwil has conducted assessments and has treated children, adolescents and young adults with a wide spectrum of developmental and behavioral conditions. He has an excellent knowledge base. He seeks to share his knowledge with and learn from others. Dr. Marwil is an active member of the Society for Developmental and Behavioral Pediatrics.

How do you know this therapist? Dr. Marwil and I are colleagues. We practice in nearby geographical areas. We have collaborated in the care of several patients and have met regularly to discuss clinical practice issues.

What topic(s) would you refer clients to this therapist for? ADHD, Learning Disabilities, Autism Spectrum Disorders, Anxiety Disorders
— Jeannine R. Audet, MD Developmental-Behavioral Pediatrician (2016)


Hours for Dr. Marwil's office:
Monday - Friday, 9am - 5pm

Dr. Marwil's support staff will be able to set up your appointment. Please note Dr. Marwil specializes in the diagnosis and treatment of ADHD for adults, not general psychiatry or talk therapy.