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Maria C Castells

Maria C Castells, MD, PhD

Internal MedicineAllergy and Immunology

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • Spanish
  • Italian
  • French
  • English

Gender

Female

Locations

  1. Brigham and Women's Allergy and Immunology Clinic
    • phone: 617-732-9850
    • fax: 617-731-2748
  2. Brigham and Women's Allergy and Immunology Clinic

Expertise

Education

  • Residency: Kansas University Medical Center, Allergy & Immunology, 1990
  • Fellowship: Medical College of Virginia, Allergy & Immunology, 1988
  • Internship: Kansas University Medical Center, 1980
  • Medical Education: Universidat Autonoma de Barcelona, Spain, 1979

Board Certifications

  • Allergy and Immunology: American Board of Allergy and Immunology, 1995

Insurance

This provider may accept more insurance plans than shown. Please call the practice to find out if your plan is accepted.
Search plans
  • Aetna
  • Beech Street
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield Medicare
  • Cigna
  • Commonwealth Care Alliance
  • Coventry
  • Fallon Health
  • Harvard Pilgrim Health Care
  • Humana
  • Mass General Brigham Health Plan
  • MassHealth
  • Medicaid CT
  • Medicaid ME
  • Medicaid NH
  • Medicaid VT
  • Medicare
  • Medicare ACO
  • Multiplan
  • Railroad Medicare
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Tufts Medicare Preferred
  • United Health Care
  • Wellpoint
  • WellSense

Ratings & Reviews

4.9 out of 5

50 ratings, 25 reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

How likely would you be to recommend this provider to your family and friends?
Search reviews
  • Reviewed on 1/29/2026

    Always treated with respect!

  • Reviewed on 12/9/2025

    My experience was amazing. The doctor was extremely knowledgeable and kind. I left my visit fully informed and now have a very positive outlook going forward knowing the care I will receive.

  • Reviewed on 11/22/2025

    Dr Castells was absolutely amazing. She explained my condition to my husband & I thoroughly in easy to understand language. Dr Castells was so kind compassionate & took the time to answer all of our questions & concerns & was so knowledgeable & insightful. I am so grateful for the opportunity to have been seen by Dr Castells for my condition.

  • Reviewed on 11/22/2025

    I pray that I will be an appropriate patient for a new medication that was proposed for my health issue. It has been difficult for me for several years. My health has certainly been improved upon through my time with Dr Castells and I am most hopeful. So much to gain if possible.

  • Reviewed on 11/21/2025

    Dr Castells is the best of the best.She is absolutely one of a kind ,her knowledge,expertise,research,and kindness are unsurpassed.

  • Reviewed on 10/31/2025

    Dr. Castells is my main physician, and I feel utterly confident in her ability to help me with my health issues.

  • Reviewed on 10/19/2025

    I am so grateful to have Dr Castells as my physician provider.

  • Reviewed on 9/10/2025

    The Best!

  • Reviewed on 9/8/2025

    EXCELLENT DR, VERY KNOWLEDGABLE, COMPASSIONATE AND KIND

  • Reviewed on 8/14/2025

    It was honestly one of the best appointment in my life! I felt validated and understood for the first time ever. Dr. Castells is not only an amazing knowledgeable doctor but she is extremely empathetic and kind. I was so happy that someone finally seemed to understand what my life has been living with this disorder.

  • Reviewed on 8/14/2025

    She is an outstanding, knowledgeable, and caring Doctor. My experience has been outstanding for care for many, many years. She explains the issues and helps me when needed for support for surgery. You are indeed fortunate to have her on your Staff.

  • Reviewed on 8/15/2025

    Hi, Dr. Maria Castells is the best doctor I have ever worked with in my life. She is thorough, compassionate, and extremely knowledgeable. And she has kept me alive for the last 17 years of my life, and not only alive, but doing well. and I appreciate her more than anyone could ever guess.

  • Reviewed on 8/1/2025

    I think Dr. Castells is an outstanding, superior physician, and I feel very confident in her hands, and before I even got there, in her staff. And I'm very, very pleased that I have seen her, [redacted]

  • Reviewed on 7/27/2025

    Very professional, caring and loving . Always helping me making good choices and decision with a very clear explanations that will make my chronic condition better. I am always impressed with doctor Maria Castells

  • Reviewed on 7/27/2025

    My doctor is the best doctor I have ever had. She is caring, she listens to you, makes recommendations, If you don't understand something, she will explain it until you do. I have total respect for her. She is brilliant.

  • Reviewed on 7/14/2025

    Well, I've been waiting to see somebody like her for a very long time, but I didn't know for a very long time that I needed to see Dr. Castells cause she's a specialist. I didn't know I had what I had so she was really I know this sounds corny a god sent

  • Reviewed on 7/13/2025

    I am fortunate to be in the care of Dr. Castells.

  • Reviewed on 7/9/2025

    Dr. Castells is extremely knowledgeable of my disease and she was able to inform my wife and I of many aspects of the disease itself, as well as the research that is being done to search for a cure. She explained many possible treatment options that were very encouraging. We enjoyed our visit and look forward to following up with Dr. Castells in the prescribed 2-3 weeks via telephone.

  • Reviewed on 7/5/2025

    I have been seeing Dr Castells for over 13 years. She is the best in her field.

  • Reviewed on 7/19/2025

    Dr. Castells and [redacted] have provided excellent care and attention to me throughout my clinical trial. All their coordinators have been top notch as well!

  • Reviewed on 5/26/2025

    This provider has given me exceptional care over the years. She is extremely experienced and knowledgeable about mastocytosis. She has changed the quality of my life for the better.

  • Reviewed on 5/18/2025

    Dr Castells is great and knowledgeable and an asset to the world So grateful to have her as my doctor

  • Reviewed on 4/14/2025

    The best, Dr Castells is my God in human form!

  • Reviewed on 4/8/2025

    She has been my main physician to deal with mcas, and I am totally grateful for her help with surgeries and other medical issues. She has been decisive in terms of my personal medical concerns and has kept me safe.

  • Reviewed on 4/6/2025

    Dr Castells has turned my health around as my immunologist. Through her expertise I have been properly diagnosed and living a much improved life.