Paul R Cass, DO

Paul R Cass, DO

Not currently accepting new patients

4.774684 average rating from 158 patient reviews

Specialties

Affiliation

Mass General Brigham

Provider Locations

  • Portsmouth, NH
  • Dover, NH

Education & Training

  • Fellowship: Boston University Medical Center, Neurology, 1982
  • Residency: Boston City Hospital, Neurology, 1981
  • Residency: Boston University Medical Center, Neurology, 1979
  • Residency: University of Connecticut Health Science Center, Pediatrics, 1978
  • Internship: Garden City Hospital, 1976
  • Medical Education: Kansas City College of Osteopathic Medicine, 1975

Board Certifications

  • Neurology, American Board of Psychiatry and Neurology
  • Child and Adolescent Psychiatry, American Board of Psychiatry and Neurology

Languages Spoken

  • English

Age Group Treated

  • Adults

Patient Feedback

4.774684 average rating from 158 reviews

  • Dr. Cass came highly recommended and I can see why. He is very personable and knowledgeable

    2026-07-19

  • Excellent physician

    2026-07-19

  • Hi, this is [redacted] answering for [redacted], who saw Dr. Cass for sleep apnea issues on [redacted]. He was wonderful, showed us all the equipment, explained everything. We felt very satisfied. He was personable. It couldn't have been better. We thank him very much and hope everything will work out. We would highly recommend him to everyone.

    2026-07-08

  • Cass is more nice than anyone else

    2026-05-23

  • Very good, and explains everything!!

    2026-05-20

  • It's always nice to see Dr Cass.

    2026-05-04

  • My experience with Dr. Cass was wonderful. He is very analytical and experienced. I came away feeling that he understood my condition and gave me good solutions.

    2026-04-29

  • Since Dr Cass has the same issue that I have, it was great to be able to talk with him since he is going thru it also

    2026-04-29

  • He was very knowledgeable and explained and answered all my concerns

    2026-04-29

  • Really love Dr Cass, he spent alot of time going over all my history for full knowledge for best treating me. Very impressed with his medical approach with me and great bedside manner. Would definitely recommend

    2026-04-26

  • I would say this was the best patient Dr experience. I've had in a very long time. Very thorough explained everything very professional.

    2026-04-25

  • He was amazing. I have been trying to find out why I have been so fatigued for the last 6 years. I have been feeling this way for 10 years. I feel as though there is hope now. In the past everyone just couldn't figure it out and moved me on. My GP is the one who recommended a sleep study which finally brought me to Dr Cass. I feel so fortunate to have met him and to be his patient.

    2026-04-23

  • Dr. Cass was INCREDIBLE!!! I was SO impressed!!! He spent plenty of time with me, listened well and asked follow up questions to make sure he fully understood. I have never experienced a doctors appointment like this. This was probably the best experience I've ever had with a doctor in my 30+ years of life! Grateful to have him on my team!

    2026-04-19

  • Dr.Cass was AWESOME. Very kind & very knowledgeable. Would highly recommend him.

    2026-04-19

  • I normally avoid doctors but this doctor made me feel comfortable and I trusted him, he is very knowledgeable and professional.

    2026-04-18

  • Listens, advises and follows through.

    2026-04-10

  • Very above average experience

    2026-04-03

  • Dr. Cass has been a wonderful provider for me over the years and in general one of the best providers I have ever had.

    2026-03-28

  • Dr Cass is outstanding.

    2026-03-28

  • I always have good service. I always have good comments and always understand what's being told to me. [redacted] I thank him. Dr. Cass is very good and everybody there is good. Thank you. Bye.

    2026-03-08

  • Doctor was excellent.

    2026-03-05

  • Dr Cass was incredible. He spent so much time with me and explained everything and offered all kinds of new info. I would highly recommend him to anyone

    2026-03-04

  • Yeah, Guy was a great guy, explained everything. Obviously, he knows his business and he set me up with some equipment. [redacted]

    2026-02-26

  • Very understanding

    2026-02-22

  • Very professional and knowledgeable

    2026-02-19

  • He was very well prepared and informative.

    2026-01-22

  • He was kind and relaxed. His method of providing information about my issue aligned with how I consume data and information. He did not seem rushed and was able to complete the appointment efficiently and completely.

    2026-01-21

  • Dr Cass is an excellent educator. He took time to explain my lab results, treatment options, and provided information above and beyond what I expected to make sure I was making an informed decision about my care.

    2026-01-19

  • Dr Cass was wonderful. He spent the time and the effort to explain everything to us thoroughly and with compassion.

    2026-01-12

  • Very good experience with Dr. Cass.

    2026-01-07

  • Thoughtful and responsive. Very personable

    2026-01-05

  • Dr. Cass was very prepared for my visit. He had clearly reviewed my medical records and had a good understanding as to some of my medical conditions. He was very thorough with respect to the reason for which I was there regarding neurological sleep study and the staff were all very good as well. Thank you.

    2026-01-01

  • He was extremely nice and took his time with my needs and questions.

    2025-12-29

  • great

    2025-12-25

  • Dr. Cass is excellent, listens, is patient and I feel fortunate to have him as my doctor.

    2025-12-25

  • always friendly, and a good listener

    2025-12-24

  • Dr. Cass spent a LOT of time with us, explaining things. He was straightforward and extremely helpful in helping me make a decision.

    2025-12-22

  • Yes, this is [redacted]. I've met with Dr. Cass several times. He's the epitome of an excellent doctor in that he's friendly and courteous and professional and he explains things very clearly in detail and gives me good recommendations of how I can improve what I'm doing and also he has good feedback for my whole period of time between our visits and what I was doing and what I could do to improve and I would highly recommend him. He's very patient and very courteous, knowledgeable and professional and I had a great visit. Thank you.

    2025-12-22

  • I see this doctor annually, but I still had the sense that my issues were important to him.

    2025-12-20

  • DR CASS is always pleasant and addressed all my concerns.

    2025-12-15

  • Dr. Cass and I have, I've been seeing him for at least 35 years and he's always been very helpful, knowledgeable, kind, caring, offered suggestions and he's just been a great doctor.

    2025-12-15

  • Dr. Cass is great, visit was exactly what I needed. [redacted]

    2025-12-11

  • It was really refreshing that Dr. Cass took as much time as he needed to go over my results and what we were going to go forward with. I was very happy to see him. Thank you.

    2025-12-11

  • Dr. Cass was good at explaining everything to me

    2025-12-07

  • Great service, knowledge, personal care.

    2025-12-06

  • Dr. Cass is always up ro date with things. Discussed some changedms to be made.

    2025-11-26

  • I feel very comfortable with Dr Cass

    2025-11-26

  • Dr. Cass has provided me with excellent care for my sleep apnea and provided me with new BPAP equipment and accessories.

    2025-11-22

  • Excellent!

    2025-11-19

  • He came across as very arrogant. I got the sense that he didn't believe me or that I was lying or faking my symptoms. I don't feel like he really understood why I was there. It felt like I was wasting his very important time. [redacted]

    2025-11-19

  • Very good visit.

    2025-11-16

  • Professional and courteous as always!

    2025-11-15

  • I learned a great deal about my current medications, this provider's recommendations for changes, and plans for transitioning. I appreciate the thorough explanations he provided and the time spent.

    2025-11-14

  • They weren't provided with the records that they needed when the referral was made, but the doctor took his time going over everything with me and planned to get the records to follow up. So he really just took his time to listen to me and help me and help understand the situation and was going to make sure he got the records to make informed decisions. And I thought he handled it really well considering the records would have been helpful to navigate in the moment, but he was really kind throughout the whole thing, as well as the MA.

    2025-10-27

  • I felt very comfortable with Dr. cass , very thorough and explained everything clearly!!

    2025-10-22

  • Respectable

    2025-10-19

  • Dr. Paul Cass, is very professional and offered his opinions based on facts and data. Dr Cass is valuable member of the medical team. Thank you

    2025-10-14

  • Dr. Cass has been a tremendous gift to me in treating my Restless Leg Syndrome. His knowledge and willingness to treat me with cutting edge therapy over the past 10 years has saved me trips to Boston and given me a local doctor I trust.

    2025-10-06

  • I had a wonderful experience with Dr. Cass. He was patient and kind and explained everything to me. I have been telling everyone who will listen about how wonderful my experience was. All the staff were wonderful.

    2025-09-29

  • Dr. Cass is wonderful. He talks so that you can understand him. He is very personable and makes sure that he knows what has been going on.

    2025-09-28

  • Dr. Cass is the most well prepared doctor i have ever worked with. I really appreciate him

    2025-09-21

  • Very thorough.

    2025-09-18

  • Recommend this place highly

    2025-09-18

  • Dr Cass was fantastic

    2025-09-15

  • Dr. Cass is exceptional- listens, explains, asks good questions and is extremely knowledgeable.

    2025-09-15

Accepted Insurance

  • Martin's Point
  • Tufts Health Plan
  • NH Healthy Families
  • Medicaid ME
  • Harvard Pilgrim Health Care
  • Medicaid NH
  • Medical Network
  • TriCare
  • Medicare ACO
  • MVP
  • United Health Care
  • Tricare/ HealthNet Federal Services
  • Humana
  • Community Health Options
  • Blue Cross Blue Shield NH
  • CorVel Workers Comp
  • WellSense NH
  • Blue Cross Blue Shield - Federal
  • Medicare
  • Cigna
  • Multiplan/PHCS
  • Blue Cross Blue Shield ME
  • Aetna
  • Coventry
  • Mass General Brigham Health Plan
  • Railroad Medicare
  • WellCare
  • Meridian Health Plan
  • AmeriHealth Caritas New Hampshire