Markus Daniel Boos, MD, PhD

Markus Daniel Boos, MD, PhD

Dermatology, Vascular Anomalies

On staff since July 2015

Academic Title: Assistant Professor

"My interest in Dermatology stemmed from a family member's diagnosis of melanoma, as well as my interest in our immune system. It was when I started caring for children with skin disorders, however, that I knew I had found my calling. Specializing in pediatric dermatology brings me so much joy: from bringing a smile to a child's face, to relieving a parent's worry or knowing that I am fulfilling a need in a typically underserved medical specialty. I am so grateful to be entrusted by parents to care for their children, and to have the opportunity to do something that I love every day."

  • Markus Boos, MD, PhD is an attending pediatric dermatologist at Seattle Children's Hospital and is an Assistant Professor in the Department of Pediatrics at the University of Washington School of Medicine.

    Dr. Boos was raised in the suburbs of Detroit and received a BA in Biology and Economics from Kalamazoo College in Kalamazoo, MI. He subsequently joined the Medical Scientist Training Program at the University of Chicago, where he obtained his MD and a PhD degree in Immunology. He completed an internship in Pediatrics at the University of Chicago's Comer Children's Hospital before joining the Hospital of the University of Pennsylvania as a Dermatology resident. There he served as chief resident during his final year before completing a fellowship in Pediatric Dermatology at the Children's Hospital of Philadelphia.

    Dr. Boos enjoys caring for all children with skin disorders but has a special interest in primary cutaneous lymphoma, the skin manifestations of immunodeficiency and LGBTQ health. He is an advocate for climate/environmental health as it relates to children's health.

    As a gay father, Markus enjoys spending free time with his children. When he is not at work, he also enjoys reading, running and swimming. He cheers for his Detroit Red Wings, the San Antonio Spurs and has adopted the Seahawks as his pro football team.

    Dr. Boos, like all of Seattle Children's Hospital, values diversity and welcomes all patients and their families, regardless of race, ethnicity, religion, gender identity or sexual orientation. Our clinic is a safe space for everyone.

    • Roxayne Tacoma, WA 03.27.19

      Dr. Boos has been such a blessing to our family. My daughter was born with a strawberry birthmark on her right shoulder. About a year ago it began to change and we weren't sure what was going on with it. After about a month of taking her to her primary it wasn't getting any better. They finally sent me to a dermatologist. That dermatologist got the ball rolling and referred us to Seattle Children's where we finally met doctor Boos for long term treatment. By this point my daughter's birthmark had become ulcerated and was very painful for her. Dr. Boos was able to help us treat it and was very supportive about any medical decision that we decided to do. He gave us the options and supported our choices. Shortly after my daughter's birth mark started to heal she had a mole appear on her face. Doctor Boos removed it and did a beautiful job. The day of her procedure I was a pretty nervous mom but he did everything he could to make me feel comfortable and ease the anxiety I was having. Almost a year later there's hardly any mark on her face. Today I had to take her back in because she had another mark appear on her face that I was concerned about considering her history. Originally they couldn't get me in to see him until June. In the mean time doctor Boos told me to send him some pictures via email so he could at least take a look at it. He made my daughter an appointment within a few weeks. I found this to just be so thoughtful and caring on his part. He cared enough about my daughters health that he went out of his way to make sure she could get seen sooner than June. You can see the passion that he has for his job and I'm just very thankful that we have him for my daughter to continually go to as she grows and deals with skin changes. He's amazing and was a huge answer to prayer. Thank you Dr. Boos for all you do.

    • Hannah Tacoma, WA 02.20.18

      Our son suffered for months with a painful and worsening rash. We saw many doctors who were unable to correctly diagnose our son. We felt in our hearts that it would be best to take our son to Seattle Children’s Hospital. And that could not be more true. Dr. Boos took one look at our son and was able to provide us with a diagnosis. Finally. Biopsy results confirmed and Dr. Boos was so educated, informative, patient and kind when explaining Langerhans Cell Hystiocytosis to us. Dr. Boos has impeccable bedside manor and was very persistent in making sure that our son had all of the necessary procedures to check other organs for LCH. In the coming days as we learned more about our son's condition, Dr. Boos regularly called us with updates, asked if we had more questions, and genuinely cared to ask how we were doing. Dr. Boos is a blessing to our family. Because of him, our son is finally healing. We cannot put into words how grateful we are for Dr. Boos.

    • Jami Port Orchard , Washington 02.07.18

      Dr. Boos is an amazing doctor. My teenage daughter has been seeing him for her skin dermatographie for the past two years. We highly recommend him.

    • Jessica Seattle, WA 06.16.17

      Can't even being to put into words how great Dr. Boos is. In a time of great trepidation for our one year daughter's health, he was able to draw upon his past experiences and education to provide a rare diagnosis and treatment plan. Not only was his diagnosis accurate, but his bedside manor and translation science approach was both comforting while informative. We were so fortunate to have him on our team of physicians at Children's and have nothing but love and respect for such a great doctor. Seattle Children's Hospital is very lucky to have him!

    • Stephanie Woodway, WA 05.15.17

      Dr. Boos is amazing! His bedside manner is unbeatable and he's so incredibly smart and thoughtful when talking with kids and their worried parents. He knew exactly what the bump on my daughters head was, and was able to resolve it in one visit! Thank you Children's Hospital for having such a great doctor on staff.

    • Sara Poulsbo WA 04.25.17

      Dr Boos was able to dial in on my son's obscure skin condition when we were use to doctors shrugging their shoulders. Relief! He was so funny and kind with my son as well as informative to my husband and I. I am so grateful we were able to have him as a member of our care team. xoxoxo

  • Award Name Award Description Awarded By Award Date
    Seattles Top Doctor 2016 Seattle Met Magazine 2016
    2010-2011 Intern of the Year Comer Childrens Hospital Residency Program Senior Residents
    2010 Pritzker School of Medicine Outstanding Achievement Award Awarded to a graduating senior for the most outstanding achievement during 4 years of medical school
    2008, 2010 Students Teaching Students Award Awarded by Pritzker medical students for excellence as a teaching assistant University of Chicago Pritzker School of Medicine
    2008-2009 University of Chicago Committee on Immunology Best Dissertation Award Awarded for the most outstanding performance in the field of Immunology University of Chicago Committee on Immunology
    2010 Gold Humanism Honor Society University of Chicago Chapter
    2010 Alpha Omega Alpha Illinois Beta Chapter
    2011 Arnold P. Gold Foundation Humanism and Excellence in Teaching Award University of Chicago Chapter
    2014 Edward Bondi Teaching Award Awarded to the dermatology resident "who demonstrates exceptional dedication to the teaching and mentoring of medical students" Perelman School of Medicine Students (U. Pennsylvania)
  • Manuscripts in Refereed Journals

    • Tedesco KT, Sarthy J, Pinto N, Boos MD
      Acute enlargement of a vascular plaque and gait changes in a young girl.
      30487229 BMJ (Clinical research ed.), 2018 Nov. 28 : 363k4679
    • Boos MD, Ginsberg BA, Peebles JK
      Prescribing isotretinoin for transgender youth: A pledge for more inclusive care.
      30318854 Pediatric dermatology, 2018 Oct. 15
    • Ogimi C, Crowell C, Boos MD
      Areolar lymphocytoma in a child: A rare cutaneous presentation of borreliosis.
      29205927 Pediatric dermatology, 2018 Jan. : 35(1)e90-e91
    • Boos MD, Wine Lee L, Freedman JL, Novoa RA, Chu EY, Perman MJ
      Presentation of Acute Megakaryoblastic Leukemia Associated with a GATA-1 Mutation Mimicking the Eruption of Transient Myeloproliferative Disorder.
      26205501 Pediatric dermatology, 2015 Sept. : 32(5)e204-7
    • Boos MD | Simpson CL | Castelo-Soccio L
      Infant With a Unilateral Parotid Mass, Recurrent Otitis Media, and Macrocephaly.
      JAMA pediatrics, 2015 Aug. 1 : 169(8)783-4
    • Goldbach H | McMahon C | Boos MD
      An exophytic mass on the mandible of an immunocompromised man.
      Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2014 Feb. : 58(4)540,596-7
    • Boos MD | Yokota Y | Eberl G | Kee BL
      Mature natural killer cell and lymphoid tissue-inducing cell development requires Id2-mediated suppression of E protein activity.
      PMC2118569 The Journal of experimental medicine, 2007 May 14 : 204(5)1119-30
    • Boos, M., S.S. Samimi, A.L. Rook, A.C. Yan and E.J. Kim.
      Pityriasis Lichenoides and Cutaneous T cell Lymphoma: An Update on the Diagnosis and Management of the Most Common Benign and Malignant Cutaneous Lymphoproliferative Diseases in Children
      Curr Derm Rep, 2203-211 PMCID:DOI 10.1007/s13671-013-0054-x

    Book Chapters

    • Boos, M., K. Wanat and J. Treat
      HIV/AIDS-related Emergencies in Dermatology
      Buka’s Emergencies in Dermatology

  • Presentations Title Event Location Date
    It Happens: Skin Cancers in Children Practical Approaches to Pediatric Dermatology in Primary Care Conference Philadelphia, PA May 2015
    Lymphoproliferative Disorders of Childhood American Academy of Dermatology Annual Meeting San Francisco, CA March 2015
    Childhood Pityriasis Lichenoides and Mycosis Fungoides: When Should I Worry?" American Academy of Dermatology Annual Meeting San Francisco, CA March 2015
    Leukonychia, Koilonychia and Sebaceous Cysts in Multiple Family Members: a Kindred with Bauer Syndrome Pre-AAD Society for Pediatric Dermatology Meeting San Francisco, CA March 2015
    Cryptococcus Concealed Within a Lesion of Kaposi Sarcoma in an HIV Positive Man American Academy of Dermatology Annual Meeting Denver, CO March 2014
    Lipofibromatosis: An Institutional and Literature Review of an Uncommon Entity Society for Pediatric Dermatology Annual Meeting Milwaukee, WI July 2013


Board Certification(s)

Pediatric Dermatology

Medical/Professional School

University of Chicago Pritzker School of Medicine, Chicago


Dermatology, University of Pennsylvania School of Medicine, Philadelphia


Pediatric Dermatology, Children's Hospital of Philadelphia, Philadelphia

Clinical Interests

Pediatric cutaneous lymphoma and lymphoproliferative disorders, cutaneous manifestations of immunodeficiency, LGBTQ health