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Princess Mark-Adjeli

Princess Mark-Adjeli, MD

Medical Oncology

Accepting New Patients

Highlights

Age Groups Seen

  • Young Adult 18-25
  • Adult 26-64
  • Older Adult 65+

Languages

  • Akan
  • English

Gender

Female

Johns Hopkins Affiliations:

  • Johns Hopkins School of Medicine Faculty

About Princess Mark-Adjeli

Professional Titles

  • Clinical Associate

Primary Academic Title

Instructor in Oncology

Johns Hopkins Physician

Logo for Johns Hopkins Physician

Background

Dr. Princess Mark-Adjeli is a medical oncologist with focus on breast and gynecologic cancers. She is passionate about treating women’s malignancies and providing to patient-centered care, finding the best individual plan for each patient through targeted therapies, immunotherapy and chemotherapy. She also recognizes gaps in cancer care and is dedicated to their eradication. 

In addition to her clinical expertise, Dr. Mark-Adjeli has a great experience in designing innovative clinical trials and helping to bring new treatment options to her patients. 

Dr. Mark-Adjeli earned her Bachelor of Science in Biology from Rhode Island College and received her medical degree from American University of Antigua College of Medicine. She underwent residency training in internal medicine residency at Long Island Community Hospital affiliated with NYU Langone in Patchogue, NY, where she also served as Chief Medical Resident. She then completed her combined hematology- oncology fellowship at the National Cancer Institute/National Institutes of Health in Bethesda, Maryland, where she received the Outstanding Academic Achievement Award. During her fellowship, she gained experience managing complex cases through multi-disciplinary care, a practice which she continues at the Johns Hopkins Kimmel Cancer Center.

Locations

  1. Sibley Memorial Hospital
    • 5255 Loughboro Road Northwest, Building B, Washington, DC 20016
    • Get Directions

Expertise

Education

  • Fellowship: National Institutes of Health, Hematology and Medical Oncology, 2023
  • Fellowship: Oklahoma State University, Medical Oncology & Hematology, 2021
  • Residency: Long Island Community Hospital, Internal Medicine, 2020
  • Medical Education: American University of Antigua College of Medicine, MD, 2016

Board Certifications

  • Hematology: American Board of Internal Medicine, 2023
  • Medical Oncology: American Board of Internal Medicine, 2022
  • Internal Medicine: American Board of Internal Medicine, 2020

Insurance

Search plans
  • Aetna
  • CareFirst
  • Cigna
  • First Health
  • Geisinger Health Plan
  • HealthSmart/Accel
  • Johns Hopkins Health Plans
  • MultiPlan
  • Pennsylvania's Preferred Health Networks (PPHN)
  • Point Comfort Underwriters
  • Private Healthcare Systems (PHCS)
  • Veteran Affairs Community Care Network (Optum-VACCN)

Ratings & Reviews

4.9 out of 5

142 ratings, 74 reviews

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

Search reviews
    5 out of 5 stars
    Reviewed on 4/22/2026

    Dr.Mark-Adjeli is both extremely competent and concerned. I feel that she provides the best possible care for my condition.

    5 out of 5 stars
    Reviewed on 4/20/2026

    Dr. Mark-Adjeli is excellent In caring for all aspects of my cancer from the beginning of my diagnosis to the surgery May 24 and now to determining the Way forward. The recent results of the Mamagram for cancer was negative. Because of my cancer on the left side of the breast 20 years ago also, it is importantant that the right sided cancer that appeared In spring 2024 will not reappear. Dr. Mark-Adjeli has watched the entire way forward.

    5 out of 5 stars
    Reviewed on 4/17/2026

    Dr. Mark-Adjeli is a great provider and I am very sorry to learn that she is moving out of the area. She has always been respectful and empathetic. She is a doctor whom I always look forward to seeing.

    5 out of 5 stars
    Reviewed on 4/17/2026

    Dr. Mark-Adjeli is a GEM! I will be so sorry to see her leave. She is most caring and cordial and always puts me at ease.

    5 out of 5 stars
    Reviewed on 4/15/2026

    At every appointment I have with Dr. Mark-Adjeli she takes the time to listen, explain things clearly, and answer questions. She is a very knowledgeable doctor who also understands how overwhelming a cancer diagnosis can be. I had trouble absorbing information and she was so patient and empathetic. Being in the care of an excellent doctor who is also caring and easy to talk to makes this difficult journey easier.

    5 out of 5 stars
    Reviewed on 4/15/2026

    Dr Princess Mark-Adjeli is one of the smartest, most compassionate doctors in have ever known.

    5 out of 5 stars
    Reviewed on 4/14/2026

    Dr. Mark-Adjeli is a phenomenal physician who takes time to ask may questions and followups to determine how you are feeling which you may not even think of.

    5 out of 5 stars
    Reviewed on 4/14/2026

    I like the way she listens and take all the necessary time with me

    4 out of 5 stars
    Reviewed on 4/14/2026

    Dr. Mark-Adjeli is a skilled and caring physician. I will be sorry to see her leave Hopkins.

    5 out of 5 stars
    Reviewed on 4/14/2026

    I appreciate that Dr Mark-Adjeli could provide me information about the range of reactions to the drug I am taking, and also gave me information I needed to make about a procedure I needed. She took the time to help me and help me feel good about my decision.

    5 out of 5 stars
    Reviewed on 4/10/2026

    Dr. Mark-Adjeli is a gifted physician and a loving human being. She is a great listener. She is patient, kind, and welcomed all of my questions. I am forever grateful for having her as part of my medical team. I will miss her greatly!

    5 out of 5 stars
    Reviewed on 4/8/2026

    Dr. Mark-Adjeli is quite simply an angel. Not only did she manage my breast cancer, I sent my mother to her when she was diagnosed with ovarian cancer. I've never had a doctor so warm and empathetic. She gave our family so much love during my mom's chemo. My mom did not make it, but after her death Dr. Mark-Adjeli called all of us (me, my brother, and my father) to share her sadness over my mom's passing. A total and complete class act. It is a huge loss for Sibley that she is leaving.

    5 out of 5 stars
    Reviewed on 4/1/2026

    Excellent service. Provider is courteous and caring. She asks appropriate questions. I can talk to her about my concerns and questions.

    5 out of 5 stars
    Reviewed on 4/1/2026

    Dr. Mark-Adjeli is an excellent doctor. I appreciate her extensive knowledge and willingness to answer all my questions. She was thorough and patient in our discussions. Her ability to listen is healing in and of itself.

    5 out of 5 stars
    Reviewed on 3/25/2026

    She was eager to answer my questions and provide helpful info.

    5 out of 5 stars
    Reviewed on 3/17/2026

    I will miss Dr. Mark-Adjeli when she's gone. She is an excellent clinician and empathetic human.

    5 out of 5 stars
    Reviewed on 3/13/2026

    Dr Mark-adjeli is awesome! She is compassionate and very knowledgeable and always instills confidence that I am getting the best care.

    5 out of 5 stars
    Reviewed on 3/5/2026

    I am always happy to see Dr Mark-Adjeli. She is caring and clear and straightforward.

    5 out of 5 stars
    Reviewed on 3/4/2026

    Dr. Mark-Adjeli informed me she was transferring to another city, and I was very sorry to lose her as my provider. She is extremely kind, spends as much time as is needed, and answers all questions.

    5 out of 5 stars
    Reviewed on 3/3/2026

    EXCELLENT

    5 out of 5 stars
    Reviewed on 2/27/2026

    She an excellent doctor, I am very happy she is my doctor.

    5 out of 5 stars
    Reviewed on 2/25/2026

    Dr Mark-Adjeli is excellent. She's the reason I'm alive and I trust her completely

    5 out of 5 stars
    Reviewed on 2/25/2026

    Dr Mark-Adjeli is a compassionate physician who delivers her care with both skill and grace. She makes a horrible reality bearable.

    5 out of 5 stars
    Reviewed on 2/20/2026

    I think highly of the professionalism and kindness of Dr. Mark-Adjeli.

    5 out of 5 stars
    Reviewed on 2/18/2026

    Dr Mark-Adjeli was kind, compassionate and thoughtful. Very much appreciated the opportunity to get her opinions about next steps in my care.

    5 out of 5 stars
    Reviewed on 2/18/2026

    Excellent!

    5 out of 5 stars
    Reviewed on 2/17/2026

    The provider spent good time with me and was not in a rush when she talked about things. She was caring, concerned, and empathetic toward my situation. She told me what my options were.

    5 out of 5 stars
    Reviewed on 2/13/2026

    Dr. Mark-Adjeli was thorough and answered all of my questions.

    5 out of 5 stars
    Reviewed on 2/13/2026

    I am very pleased with Dr. PRINCESS MARK-ADJELI, she has given me excellent care since my cancer diagnosis.

    5 out of 5 stars
    Reviewed on 2/12/2026

    KnowledgeableDelightful to deal with

    5 out of 5 stars
    Reviewed on 2/10/2026

    Dr. Mark-Adjeli is a very knowledgeable, caring, empathetic doctor with an excellent bedside manner who explains everything clearly, encourages and addresses all questions and concerns, listens, and puts her patients at ease.

    5 out of 5 stars
    Reviewed on 2/10/2026

    Excellent doctor who cares about her patients!

    5 out of 5 stars
    Reviewed on 2/5/2026

    My experience with Dr Mark-Adjeli has been positive. I feel as if I am important and as if I'm benefiting from the totality of her experience.

    5 out of 5 stars
    Reviewed on 2/3/2026

    Extremely compassionate and empathetic., positive, more than willing to assist in any way she could. She went out of her way to make sure I felt comfortable enough to reach out to her for anything. She made me feel like a person, not a number.

    5 out of 5 stars
    Reviewed on 2/3/2026

    Compassion and caring.

    5 out of 5 stars
    Reviewed on 1/27/2026

    Dr. Mark-Adjeli is knowledgeable, patient and very caring. She answered every question thoroughly in a way that was easy for this layman to understand. She is clearly a compassionate individual that cares about her patients. I am happy to have found her.

    5 out of 5 stars
    Reviewed on 1/16/2026

    My doctor is kind and knowledgeable and took time to explain things to me. I really like her!

    5 out of 5 stars
    Reviewed on 1/16/2026

    Dr Mark-Adjeli was very professional, easy to communicate with and well informed. She answered my questions and made me feel comfortable.

    5 out of 5 stars
    Reviewed on 1/16/2026

    Dr. Mark-Adjeli is outstanding in every way. She cares about your overall health and mental well being during a cancer diagnosis.

    5 out of 5 stars
    Reviewed on 1/14/2026

    I really like her because she never rush me out the office and always listen to my concerns

    5 out of 5 stars
    Reviewed on 12/31/2025

    Dr. Mark-Adjeli is a warm, knowledgeable,, skilled, professional medical oncologist and I am confident of her excellence in handling my case and anyone requiring cancer treatment services!

    5 out of 5 stars
    Reviewed on 12/30/2025

    Dr Mark-Adjeli is a great oncologist. She is very knowledgeable and has a great deal of empathy

    5 out of 5 stars
    Reviewed on 12/30/2025

    Dr. Mark-Adjeli has a very warm personality and takes the time to listen to what you say and makes sure you don't have any further questions

    5 out of 5 stars
    Reviewed on 12/23/2025

    Excellent andbhelpful!

    5 out of 5 stars
    Reviewed on 12/19/2025

    My provider has been excellent --caring, attentive, helpful.

    5 out of 5 stars
    Reviewed on 12/16/2025

    She is the warmest and most attentive doctor I have ever had. She listens well and explains well and is easy to talk to.

    5 out of 5 stars
    Reviewed on 12/12/2025

    Excellent

    5 out of 5 stars
    Reviewed on 12/10/2025

    My provider explain my visit Thoroughly I appreciate

    5 out of 5 stars
    Reviewed on 12/9/2025

    She's terrific!

    5 out of 5 stars
    Reviewed on 12/3/2025

    Dr. Mark-Adjeli is an outstanding physician dedicated to the care and medical success of her patients.

    5 out of 5 stars
    Reviewed on 11/25/2025

    She is both compassionate and caring.

    5 out of 5 stars
    Reviewed on 11/21/2025

    Knowledgeable, warm, friendly..everything I could want from a provider.

    5 out of 5 stars
    Reviewed on 11/18/2025

    She is a wonderful doctor and I appreciate her concern and compassion but mostly her knowledge about my illness. She explains the facts well.

    5 out of 5 stars
    Reviewed on 10/24/2025

    Kind and patient

    5 out of 5 stars
    Reviewed on 10/24/2025

    Very caring. Does not rush. She is a good listener and makes me feel comfortable about my health and what I need to do.

    5 out of 5 stars
    Reviewed on 10/22/2025

    Dr. Mark-Adjeli, is a terrific medical oncologist: warm, caring, knowledgeable, experienced, and professional. I'm happy to recommend her to any cancer patient!

    5 out of 5 stars
    Reviewed on 10/15/2025

    Dr. Mark-Adjeli is not only a delightul person but a caring and concerned care giver. I love workint with her.

    5 out of 5 stars
    Reviewed on 10/10/2025

    Top tier.

    5 out of 5 stars
    Reviewed on 9/30/2025

    Very throughly discussed my options with care and thoughtfulness.

    5 out of 5 stars
    Reviewed on 9/30/2025

    Dr. Mark-Adjeli is very personable and brought up side affects of my medication I didn't realize. She is very informative but will a giant heart of Joy!!

    5 out of 5 stars
    Reviewed on 9/26/2025

    My Dr and my nurse--Very thorough, caring and informative.

    5 out of 5 stars
    Reviewed on 9/17/2025

    Good.

    5 out of 5 stars
    Reviewed on 9/16/2025

    I just got off the phone with Dr. Mark-Adjeli about a question I had from my last visit. She called me directly

    5 out of 5 stars
    Reviewed on 9/9/2025

    Dr. Princess should be upgraded to Dr. Goddess.

    5 out of 5 stars
    Reviewed on 8/15/2025

    Great

    5 out of 5 stars
    Reviewed on 8/15/2025

    The best!

    5 out of 5 stars
    Reviewed on 8/13/2025

    Dr. Mark-Adjeli is an excellent doctor and I am very grateful to be under her care. She always listens to concerns and gives excellent explanations and advice regarding complex medical Issues. Dr. Mark-Adjeli provides a rare combination of expertise, intelligence, patience and compassion to her patients.

    5 out of 5 stars
    Reviewed on 8/13/2025

    Dr Mark-Adjeli is such a compassionate physician & very easy to talk too. She listens carefully to my concerns, as well as those of my family. I always feel encouraged after meeting with her. She makes sure that she has answered our concerns before we leave. I feel very fortunate to have her as my oncologist.

    5 out of 5 stars
    Reviewed on 8/1/2025

    Very caring and shows real concern for how you are doing.

    5 out of 5 stars
    Reviewed on 7/30/2025

    She is fantastic.

    5 out of 5 stars
    Reviewed on 7/25/2025

    Dr, Mark-Adjeli is a talented profession. She is pleasant, speaks in terms I can understand and is quite comforting.

    5 out of 5 stars
    Reviewed on 7/16/2025

    The provider was very professional in herVirtual visit with me.

    5 out of 5 stars
    Reviewed on 6/20/2025

    Dr Mark-Adjeli is one of the kindest, most competent doctors I've ever met. She listens so well and with so much empathy, I would think she was trained in psychology. She is so crisp and compelling with her facts on stats and options for the best drugs and behaviors to help me get better, she is really convincing. I walk into these appointments nervous about cancer and leave confident-she reminds me of my agency and gives me trust in her and Hopkins's care.

    5 out of 5 stars
    Reviewed on 6/18/2025

    Dr. Mark-Adjeli is an outstanding professional, totally dedicated to my comfort and care.