Pediatric Hospital Medicine Fellowship


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CU Anschutz Medical Campus (CU Anschutz)

The CU Anschutz Medical Campus includes the Schools of Medicine, Public Health, Dentistry, Pharmacy, and Nursing, and a Graduate School with doctoral training programs in Basic Sciences, Analytic Health Sciences, and Clinical Sciences. In 2013, CU Anschutz researchers received over 500 grants from the National Institutes of Health (NIH) amounting to more than $184 million, making it one of the top ten public universities with NIH support. To view a virtual tour of the campus, please click here

Children’s Hospital Colorado (CHCO)

Children's Hospital Colorado is a national leader, ranked consistently among the top 10 in the nation by U.S. News and World Report. The main hospital is located on 48 acres on the Anschutz Medical Campus in Aurora, at the eastern edge of the Denver metro region. CHCO also includes 15 additional community or Network-of-Care affiliations throughout Colorado and receives referrals from seven surrounding states.


Our PHM fellowship has received ACGME accreditation. Fellows will receive comprehensive training and guidance in clinical care, scholarship, and education in Pediatric Hospital Medicine. At completion, fellows will be primed to begin a career in Pediatric Hospital Medicine in academic and/or community settings. Structure and allocation of time for clinical and scholarly pursuits align with ACGME requirements for PHM fellowship programs, allowing flexibility and individualization when possible so fellows can pursue their career goals.

Brittan, Mark

Mark Brittan, MD, MPH
Fellowship Director


Kimberly O'Hara, MD
Fellowship Associate Director

Clinical Care

Fellows will receive outstanding inpatient clinical experience at both our quaternary care and community hospitals. This experience includes working on the Hospital Medicine services at Children’s Hospital Colorado, University of Colorado Newborn Nursery, and at one or more of our community or Network of Care sites. In addition, fellows will gain procedural and sedation experience, perform hospital medicine consultations, and co-manage patients with our surgical colleagues. They will also have the opportunity to rotate in our critical care units or Emergency Departments and with our Acute or Chronic Pain, Palliative Care, and Complex Care services.  Responsibilities include taking calls from home and working very few evenings or overnight shifts each year.


Fellows will have the opportunity to explore specific areas of interest through clinical electives, including but not limited to:

  • Infectious Disease
  • Transport Medicine
  • Adolescent Medicine
  • Pulmonary
  • Gastroenterology
  • Nephrology
  • Cardiology
  • Neonatal Intensive Care
  • Pediatric Intensive Care
  • Child Abuse and Neglect
  • Global Health
  • Risk Management


Fellows will have substantial time allocated to developing scholarship. Opportunities exist for projects in translational research, health services research, Medical Education, Clinical Effectiveness, patient safety, and Quality Improvement (QI). Our PHM Section has highly qualified mentors with varied interests and expertise (see Mentorship tab). The Section is supported by highly experienced Research Directors, research coordinators, statisticians, and a survey methodologist.


To enhance their research skills, fellows may participate in formal training programs. These include the Master’s in Clinical Sciences (MSCS) Program and the Institute for Healthcare Quality, Safety and Efficiency (IQHSE) Certificate Training Program . These programs will be supplemented with Section of PHM’s monthly educational and research conferences, workshops through the Center for Faculty Development, Department of Pediatrics Fellowship Educational Series, bi-monthly work-in-progress sessions, and University-based learning opportunities through the Colorado Clinical and Translational Sciences Institute (CCTSI) and Adult & Child Consortium for Health Outcomes Research & Delivery Science (ACCORDS) .


Fellows will be expected to participate in one or more QI initiatives, submit abstracts to conferences, apply for small grant applications, and begin to write manuscripts to peer-reviewed journals. Fellows interested in QI have access to institutional leadership and Process Improvement specialists through the Quality and Patient Safety Department.


Fellows will be able to attend and present at local and national conferences, such as Children’s Colorado Clinical Concepts & Conundrums in Pediatric Hospital Medicine, local QI Symposiums hosted by CHCO and the University of Colorado, Council on Medical Student Education in Pediatrics (COMSEP) annual meeting, Pediatric Academic Societies’ annual meeting, and Pediatric Hospital Medicine annual meeting.


Medical Education

Our educational mission is to develop leaders skilled in the education of other learners, patients, families, and the community at large. Fellows will teach a variety of learners while conducting family-centered rounds at CHCO and our community hospitals. They will receive training and support to design educational curricula, present small group teachings or didactics in their areas of interest, provide effective feedback, and serve as mentees or mentors to others. Educational learning opportunities at CU Anschutz include:

Fellows may hone their educational skills through other forums within the Section of Pediatric Hospital Medicine and the Department of Pediatrics:

  • Work-in-Progress Sessions
  • Morbidity and Mortality conference
  • Journal Club
  • Morning Report
  • Noon Conference
  • Section of PHM educational and research conferences
  • Section of PHM Teaching Excellence Among Medical Providers (“TEAM”) Program
  • Section of PHM HOspital Medicine Mentorship and Engagement (“HOME”) Program
  • Department of Pediatrics Fellowship Educational Series

Leadership and Administration

PHM fellows are the hospital leaders of tomorrow. Our fellows will gain experience through leading process improvement teams, collaborating on hospital committees, participating in community outreach programs, and developing clinical pathways. Within the Section of PHM, there are notable leaders in administration, medical education, research, and Quality Improvement who will guide Fellows to develop leadership skills and competence (see Mentorship tab). Formal avenues of training include People Development at CHCO, which focuses on leadership style and effectiveness, personal evaluation, crucial conversations and communication models; the IHQSE Certificate Training Program; and the Academy of Medical Educators Faculty Development Program.

Diversity, Equity, and Inclusion

Our fellowship aims to build and maintain an infrastructure to recruit diverse fellows and provide an inclusive learning environment that promotes and celebrates differences. Our fellows have the opportunity to engage with the Children’s Hospital Colorado’s Diversity in Pediatrics Committee, the Minority and Allied Resident Council (MARC), and many other groups on campus. For more information, please visit:

Section of Pediatric Hospital Medicine Mentors

Leadership roles and scholarly interests for some faculty members of our PHM Section are listed in the attached PHM Mentor List.

1st Year Fellow


Brandy Hoyt, MD
  • Undergraduate: University of Florida
  • Medical School: Herbert Wertheim College of Medicine
  • Pediatric Residency: University of South Florida
  • Pediatric Chief Residency: University of South Florida
  • Scholarly interests: Quality Improvement, Medical Education & Curriculum Development, Antibiotic Stewardship
  • Selected Bibliography: 
  • 2022 Pediatric Academic Societies (PAS) Annual Meeting - Denver, Colorado.
    • Compton B, Berman D, Mercurio D, Morrison J. Staphylococcus aureus Polymerase Chain Reaction Usage for Cutaneous Abscesses in the Pediatric Emergency Department and Impact on Antibiotic Prescribing, a Quality Improvement Project.
    • Carre C, Compton B, Blanco M, Straub D, Soylu L. Evaluating the Effectiveness of Educational Interventions in Improving Recognition and Diagnosis of Pediatric Hypertension.
  • Siraj S, Compton B, Russell B, Ralston S. (2021). Reducing High-flow Nasal Cannula Overutilization in Viral Bronchiolitis. Pediatr Qual Saf, 2021 Jun 23;6(4):e240. Poster presented virtually at the 2020 American Academy of Pediatrics National Conference (AAP NCE).
  • Compton B, Straub D, Soylu L. Improving Ambulatory Pediatric Blood Pressure Measurement and Management. 2020 Pediatric Academic Societies Annual Meeting. (Conference canceled due to COVID).
  • Compton B, Klein K, Goldberg D, Zevallos J, Lozano J. (2017). Prevalence of Traumatic Brain Injury in Children with Attention-Deficit/Hyperactivity Disorder: a Cross-Sectional Study. Florida Med Student Res J, 2017 Apr: 2(1):7-11. Available at:

2nd Year Fellows

Kimiko Dunbar, MD
  • Undergraduate: The College of William and Mary
  • Medical School: University of Michigan Medical School
  • Pediatric Residency: Boston Combined Residency Program
  • Pediatric Chief Residency: Boston Combined Residency Program
  • Scholarly interests: Medical Education: Feedback and Assessment, Prevention of Bias in Evaluation
  • Selected Bibliography:  
    • Alejandro F. Siller, MD, MSCI, Julia K. Yarahuan, MD, Huay-Ying Lo, MD, Lanessa Bass, MEd, MD, Kimiko Warlaumont, MD, Andrew Yu, MD, Lauren M. Hess, MD (2021). Not the Data We’re Looking for: A Needs Assessment for Providing Individualized Performance Data to Pediatric Residents. Poster Presented at Virtual Pediatric Academic Societies Meeting.
    • Cushing, A.M., Warlaumont, K.S., Rabinowitz, E.C., Pastor, T.A., Freiman, E., Winn, A.S. (2019). Investigating Areas for Improvement in Feedback from Fellows to Residents in an Academic Pediatric Residency Program. Poster Presented at Pediatric Academic Societies Meeting; Baltimore, MD
Mulhern, Brendan
Brendan Mulhern, MD
  • Undergraduate: University of Illinois - Urbana-Champaign
  • Medical School: University of Minnesota – Twin Cities
  • Pediatric Residency: University of Colorado - Denver
  • Pediatric Chief Residency: University of Colorado - Denver
  • Scholarly interests: Clinical Informatics, Quality Improvement
  • Selected Bibliography:  
    • 2020: Pediatric Academic Society and Pediatric Hospital Medicine Annual Conferences, Abstracts and Posters (no conference due to COVID)
      • “A Resident-led Initiative to Improve Medical Documentation”
    • 2019: Pediatric Academic Society and Pediatric Hospital Medicine Annual Conference, Poster Presentations
      • “Resident Initiative Highlights Training Deficits in Medical Documentation”


John "Jay" Watson, MD
  • PHM Fellowship Training Years: 2020-2022
  • Undergraduate: Vanderbilt University
  • Medical School: University of Alabama at Birmingham School of Medicine
  • Pediatric Residency: University of Colorado – Denver
  • Pediatric Chief Residency: University of Colorado - Denver
  • Scholarly interests: Leveraging clinical decision support tools to improve patient outcomes, lower respiratory tract infections and their role in asthma development
Kristin Kalita, MD, MSCS
  • PHM Fellowship Training Years: 2019-2021
  • Undergraduate: Loyola University - Chicago
  • Medical School: Loyola University Stritch School of Medicine
  • Pediatric Residency: University of Colorado – Denver
  • Scholarly Interests: Pediatric palliative care, care of medically complex children, global health, opioid prescribing practices, qualitative research
Cristin Fritz, MD, MPH
  • PHM Fellowship Training Years: 2018-2020
  • Undergraduate: Washington and Lee University, 2006-2010
  • Medical School: Vanderbilt University School of Medicine, 2010-2015 (Combined MD and MPH program)
  • Pediatric Residency: Vanderbilt University Medical Center, 2015-2018
  • Scholarly Interests: Social Determinants of Health, Social risk screening and resource connection, Population Health, Quality Improvement
Laura Zastoupl Lockwood, MD, Med
  • PHM Fellowship Training Years: 2017-2019
  • Undergraduate: University of Denver, BS in Biology
  • Medical School: Chicago Medical School at Rosalind Franklin University of Medicine and Science
  • Pediatric Residency: University of Colorado - Denver
  • Pediatric Chief Residency: University of Colorado - Denver
  • Scholarly interests: Improving trainee medical education through curriculum development, personal and professional development of learners, and educational scholarship.
Jillian Cotter, MD, MSCS
  • PHM Fellowship Training Years: 2017-2019
  • Undergraduate: University of Pennsylvania, BA in Biology and Economics
  • Medical School: Icahn School of Medicine at Mount Sinai 
  • Pediatric Residency: University of Colorado - Denver
  • Scholarly interests: Evaluating and improving the use of rapid diagnostic stool tests in diarrhea, specifically relating to Clostridium Difficile, Investigating the cost-effectiveness of commonly ordered interventions
Justin Lockwood, MD, MSCS
  • PHM Fellowship Training Years: 2016-2018
  • Undergraduate: Michigan State University Lyman Briggs College
  • Medical School: Michigan State University College of Human Medicine
  • Pediatric Residency: University of Colorado - Denver 
  • Scholarly Interests: Health Outcomes Research; Quality Improvement; Care Escalation/Rapid Response Systems; Sepsis
Kimberly O'Hara, MD
  • PHM Fellowship Training Years: 2015-2017
  • Undergraduate: Cornell University 
  • Medical School: Chicago Medical School at Rosalind Franklin University of Medicine and Science
  • Pediatric Residency: NewYork Presbyterian/Weill Cornell Medical Center
  • Pediatric Chief Residency: NewYork Presbyterian/Weill Cornell Medical Center
  • Scholarly Interests: Medical Education including curriculum development and Faculty Development; High-Value Care; Qualitative Research 
Sarah Luthy, MD, MSCS
  • PHM Fellowship Training Years: 2014-2016
  • Undergraduate: Amherst College
  • Medical School: University of Pittsburgh School of Medicine 
  • Pediatric Residency: University of Michigan Healthy System
  • Scholarly Interests: Palliative Care


The University of Colorado Pediatric Hospital Medicine Fellowship program is designed for the motivated, self-directed learner who wants to develop a career based on excellence in scholarship, education, leadership, and clinical pediatric hospital medicine. To be considered for admission to our program, applicants must be in the process of completing training in (or completed) a 3-year ACGME-accredited Pediatric Residency program. We encourage applications from members of underrepresented minority groups to apply.

Application Process

If you are interested in applying to our fellowship program, the application period will open on July 6, 2022 in alignment with dates provided by ERAS. Fellow selection is accomplished by participation in the National Residency Matching Program Match service, which occurs in late fall each year.

ERAS Application Timeline

May 31, 2022ERAS 2021 season ends at 5 p.m. ET.
June 8, 2022ERAS 2022 season begins at 9 a.m. ET.
June 9, 2022EFDO will release tokens to fellowship applicants.
July 6, 2022July cycle fellowship applicants may begin submitting applications to programs at 9 a.m. ET.
July 20, 2022July cycle fellowship programs may begin reviewing applications at 9 a.m. ET.
May 31, 2023    ERAS 2022 season ends at 5 p.m. ET.

 NRMP Fall Match Timeline

August 24, 2022Match Registration Opens 
September 28, 2022Rank Order List Opens
November 2, 2022Quota Change Deadline
November 16, 2022Rank Order List Certification Deadline
November 30, 2022MATCH DAY

Submitting Your Application

Our fellowship participates in the Electronic Residency Application Service (ERAS). Please submit your application through ERAS. Interview invitations will be offered on a rolling basis after July 20, 2022. Virtual interviews will be held from September 2022 through early November 2022. 

While completing the ERAS online application, applicants should make certain to provide the following documents:

  • Current curriculum vitae
  • Personal Statement outlining the reasons for choosing this specialty and applicant’s career plans
  • At least three (3) but no more than five (5) letters of recommendation from physicians or mentors familiar with the applicant

Please note that as an ACGME-accredited program, our fellows must have passed the USMLE Step 3 examination or COMLEX Level 3. Currently, we require non-US applicants to possess a valid certificate from Educational Commission for Foreign Medical Graduates (ECFMG). The ACGME now requires fellows to have completed pediatric residency training in a U.S. or Canadian ACGME-certified program prior to subspecialty fellowship training.

For additional questions about our fellowship program, please contact the program at

Diversity / Equity / Inclusion


We are committed to creating a diverse environment for students, residents, fellows, and faculty. We believe that an environment of inclusiveness and respect promotes excellence and that a setting where diversity is valued leads to the training of physicians who are prepared to practice culturally effective medicine and meet the needs of the various populations we serve. Visit our Diversity, Equity, and Inclusion webpage for more....

Well-Being / Resilience

Be well

By embracing wellness and improving personal resiliency, physicians can reconnect with the meaning of their work and fend off stress. Reducing or eliminating burnout also has practical implications for the entire department such as improving patient safety, student advancement, and the overall campus environment. 
Visit our Pediatric Well-Being and Resilience website