Current Fellows

Pulmonary & Critical Care Fellows

Class of 2019-2022

Andrew Dunatchik, Vanderbilt

Medical School: Oregon Health & Sciences University
Residency: Vanderbilt Medical Center
Bio: Dr. Dunatchik was born and raised in Portland, Oregon. Prior to medical school he attended Oregon State University where he earned his Pharm.D. He attended medical school at Oregon Health and Science University and completed his residency at Vanderbilt Medical Center. His academic and research interests are in interstitial lung disease, critical care, clinical reasoning, and medical education. Like many Pacific Northwest natives his time outside the hospital is spent outdoors, rock climbing, backpacking, running, and biking.

Darius Filsuf, Stanford

Medical School: Georgetown University School of Medicine
Residency: Stanford University
Bio: Dr. Filsuf was born at Stanford Hospital (300P) and grew up in nearby Los Altos, California. He attended UCLA for his undergraduate studies before moving to Washington, D.C. where he worked as a post-baccalaureate research fellow at the National Cancer Institute studying DNA repair mechanisms. He subsequently completed medical school at Georgetown University, before returning to Stanford to complete Internal Medicine residency training. He is ecstatic to be completing PCCM fellowship training at Stanford and is interested in drug-induced lung disease. He enjoys cooking, biking, and exploring the Bay Area with his wife and dog.

Jorge Munoz Pineda, Weill Cornell

Medical School: Albert Einstein College of Medicine
Residency: Weill Cornell
Bio: Dr. Pineda was born in Mexico City, Mexico. He immigrated to the Twin Cities, MN and pursued a B.A. in Psychology at Gustavus Adolphus College. He went to New York to study medicine at Albert Einstein College of Medicine and completed Internal Medicine residency at New York Presbyterian- Weill Cornell. He has interests in health care equity and recruitment of under-represented minorities. Research interests include biodesign and med-tech. 

Ana Pacheco-Navarro, Mass General

Medical School: Weill Cornell Medical College
Residency: Massachusetts General Hospital
Bio: Dr. Pacheco-Navarro originally hails from Santa Cruz, California, but spent the majority of her life moving progressively further East: first to the border town of El Paso, Texas, where she spent most of her childhood, then to Massachusetts, where she studied biology and English at Williams College.  Following graduation, she spent three years teaching high school biology and physics as a Teach for America Corps member in New York City, and carried her love of education with her to medical school at Weill Cornell Medical College, where she served as her class’s education representative and was involved in designing the medical school’s new curriculum.  She attended residency at MGH, where she continued to be involved in medical education, and where she first fell in love with pulmonary and critical care medicine.  She is delighted to return home to the Bay Area for fellowship at Stanford, where her interests include translational research in acute lung injury and increasing diversity and inclusivity in medicine.  When not in the hospital, she can be found outside on the trail, enjoying a hike or a run with her dog, Summer, and her partner, Pet.
Why Stanford? "Stanford is the ultimate choose-your-own adventure fellowship: if you have an interest (either clinical or research-based), the PCCM leadership will work with you to design the second and third year to meet your needs.   Faculty are clinically excellent, incredibly friendly, and very available to meet with fellows to discuss research and career planning, and most importantly, the Stanford fellows are a wonderful group of people to both work and hang out with, in or out of the hospital. "

Lily Zeng, Vanderbilt

Medical School: University of California, San Francisco
Residency: Vanderbilt University
Bio: Dr. Zeng grew up in Fremont and traveled a bit north to Berkley for college. During her two gap years between college and medical school at UCSF, she worked as a research technician studying the role of Protein Kinase C in drug addition. It is also during these years that she met her husband. She loved her three years in Nashville, but had to leave almost immediately after residency to join her husband in Indianapolis where he still works as an Associate Professor.  Before pursuing fellowship at Stanford, She worked two years as a hospitalist  at a community hospital. It is also during these years that She had her beautiful daughter who is now almost two years old. 

Pulmonary & Critical Care Fellows

Class of 2020-2023

Layla Barkal, Stanford

Medical School: University of Wisconsin
Residency: Stanford
Bio: Dr. Barkal was born and raised in Iowa before heading east to study biological engineering at MIT. After graduation, she moved back to the Midwest and earned her MD and PhD in biomedical engineering at the University of Wisconsin-Madison. She completed residency at Stanford as part of the Translational Investigator Program. Her academic and research interests center around host-pathogen interactions in the lungs. Outside the hospital, she enjoys hiking and exploring local farms and farmers markets.

William Bassett, Vanderbilt

Medical School: University of Pennsylvania
Residency: Vanderbilt University Medical Center
Bio: Dr. Bassett grew up in Stanford's shadow, but his path to Stanford PCCM was anything but direct. As an undergraduate at Stanford he studied biology and ethics, then pulled up his roots and moved to Philadelphia for medical school at the Perelman School of Medicine at the University of Pennsylvania. He went on to complete his internal medicine residency at Vanderbilt University Medical Center.  During his free time, he enjoys playing pick-up basketball and perfecting the chocolate truffle. 

Matthew Lyons, Ohio State Univ.

Medical School: Texas Tech University
Residency: Ohio State University
Bio: Dr. Lyons' hometown is Houston and he was a lifelong Texan prior to moving to Ohio for residency in Internal Medicine-Pediatrics at THE Ohio State University and Nationwide Children's Hospital. During residency he continued to fall in love with Pulmonary and Critical care for the moment-to-moment bedside teaching, complex pathophysiology, procedures, and dare he says, the adrenaline rush! As of this moment he is interested in point-of-care ultrasound, Critical Care, ILD, and PH. He is an enthusiastic runner and an amateur quarantine yoga enthusiast.

Reika Miyokawa, UC Davis

Medical School: University of Hawaii
Residency: University of California, Davis



Ramon Ramirez, Stanford

Medical School: University of Texas Southwestern
Residency: Stanford
Bio: Dr. Ramirez grew up in a military family and therefore moved frequently as a child. He was born in Panama City, Panama, lived in Puerto Rico, went to high school in Germany, and then moved to Texas for undergrad at the University of Texas at San Antonio, majoring in public health and minoring in biology. He completed medical school at UT Southwestern Medical Center in Dallas. He then moved to California to complete internal medicine residency training at Stanford. He enjoyed his time at Stanford and the Bay Area so much that he decided to stay for pulmonary and critical care fellowship. Given the proximity to the Bay Area’s beautiful oceans and the Pacific coast, he has become an avid surfer and enjoys spending his free time on the beach. Dr. Ramirez’s research interests include pulmonary vascular disease and critical care.

Jonathan Yang, Beth Israel

Medical School: Case Western Reserve University
Residency: Beth Israel
Bio: Dr. Yang was raised in Fullerton, California and attended UCLA for his undergraduate degree in Microbiology, Immunology and Molecular Genetics. He made the trek east to Cleveland for medical school (a truly under-rated city) followed by a three year pilgrimage to Boston for residency at Beth Israel Deaconess Medical Center as a part of the Global Health Track. He is thrilled to be back in California despite actually loving winters and the snow back east and looks forward to building a career at the intersection of critical care and global health.

Pulmonary & Critical Care Fellows

Class of 2021-2024

Solmaz Ehteshami Afshar, Yale


Medical School: Shahid Beheshti University of Medical Sciences
Residency: Yale New Haven Hospital
Bio: Dr. Ehteshami Afshar was born and raised in Iran. After finishing medical school in Tehran, she moved to Vancouver, Canada, where she earned her MSc in experimental medicine. She then moved to the US for her residency at Yale New Haven Hospital before moving back to the West Coast to start her fellowship at Stanford. Her main research interests are health services and health economics in COPD. Outside of the hospital, Dr. Ehteshami Afshar enjoys traveling, hiking and reading fiction.

Landy Luna Diaz, Univ. of Miami

Medical School: Universidad de Cartagena
Residency: University of Miami/Jackson Memorial Hospital
Bio: Dr. Luna was born and raised in Colombia, her passion for research started there working in an immunology lab in asthma and parasitic infections. She moved to the US in 2014 and started her carreer in the US working with A1ATD and COPD and UM/JMH. She is passionate about research, equality and teaching. Outside of medicine she loves moving, this includes dancing, running, hiking, skating and CrossFit!

Manoj Maddali, UC San Francisco

Medical School: Johns Hopkins
Residency: UCSF
Bio: Dr. Maddali moved to California in 2017 after spending the majority of his life in the southeastern United States. Within PCCM, he is interested in pulmonary vascular disease and ARDS. He is interested in using machine learning techniques to augment clinical decision support in the EHR. Outside of the hospital, he enjoys backcountry backpacking, reading historical fiction, cooking, and meditation.

Jason Melehani (Rheum/Pulm), Stanford

Medical School: UNC Chapel Hill
Residency: Stanford
Bio: Dr. Melehani is a first-year Pulmonary Medicine fellow at Stanford in a combined Rheumatology-Pulmonary Medicine fellowship program. He is originally from California, completed his MD and PhD training at UNC Chapel Hill, then came to Stanford for Internal Medicine residency training in the Translational Investigator Program. He is interested in autoimmune and inflammatory lung diseases and the development of novel diagnostic tools and therapies for these indications. He is currently conducting research on Sjogren's syndrome-related lung disease and lung transplant in patients with connective tissue diseases. Outside of work, Dr. Melehani is interested in new technologies, exploring outdoors and new beaches, and spending time with my wife and little Pomeranian puppy.

Andrew Moore, Stanford

Medical School: University of Virginia
Residency: Stanford
Bio: Dr. Moore was born and raised in Virginia and went to medical school at the University of Virginia before making the long trip out to Stanford for his residency and chief year. His primary research interest is in diagnostic and prognostic phenotyping in the ICU. Outside of the hospital you can usually find Dr. Moore out mountain biking or hiking in the nearby mountains or enjoying one of the many breweries in the area.

Shaun Pienkos, Stanford

Medical School: Temple University
Residency: Stanford
Bio: Dr. Pienkos was born in Saratoga, CA, and lived there for most of his life. He went to medical school at Temple University in Philadelphia, and then returned home for Internal Medicine training at Stanford. During residency, he worked with Drs. Vinicio de Jesus Perez and Angela Rogers, who helped cement his decision to pursue fellowship in PACCM. His current interests within the field include ARDS, pulmonary vascular disease, and ILD. Outside of the hospital, he enjoys hockey, golf, hiking and cooking.

Maya Viavant, Weill Cornell

Medical School: UC Davis School of Medicine
Residency: Weill Cornell
Bio: Dr. Viavant grew up in the Bay Area but bounced back and forth across the US a few times before returning home to attend Stanford. She studied biology at Dartmouth College, got her MD at UC Davis and then headed to NYC for residency at New York Presbyterian- Weill Cornell and a chief year at Memorial Sloan Kettering. Outside of the hospital she likes to garden, bike, and explore local restaurants.

Specialty/Subspecialty Fellows

Class of 2021-2022

Noura Alturaif (PH), Univ. of Virginia

Medical School: College of Medicine, King Saud University
Residency: University of Virginia
PCCM Fellowship: University of Virginia

Raquel Lyn (PH), Stanford

Medical School: Ross University
Residency: University of Texas Austin, Dell Medical School
PCCM Fellowship:  Stanford
Bio: Dr. Lyn is originally from Florida and attended college at the University of Central Florida, where she studied microbiology and molecular biology and worked as lead medical technologist in a local immunology lab prior to attending medical school. She went on to complete an Internal Medicine residency at the University of Texas at Austin, Dell Medical School where she served as chief resident before joining Stanford as a pulmonary and critical care fellow. She plans to pursue a career in Pulmonary Hypertension as a clinical educator and is interested in quality improvement and health services research that ensures access to high quality care is available to all