Clinical innovation meets personalized care.
We’re transforming how allergies are treated, grounded in evidence, designed for everyday life.
We believe in accessible allergy care for everyone.
What we stand for
Accesiblility
We believe allergy care should be accessible for everyone. That’s why we provide both in-home and in-clinic treatments focused on addressing the root cause of your allergies. With flexible scheduling, in-person and telehealth options, we make it easy to get the care you need.
Personalized care
Everyone's allergies are different, and your care should reflect that. We design treatment plans tailored specifically to each patient's allergies and clinical history.
Holistic approach backed by science
Our care isn’t just convenient, it’s grounded in clinical research. Nectar uses cutting-edge immunotherapy and diagnostics to address the root cause of allergies, with care designed to support your entire well-being.
Our team is eager to provide comfort and help patients improve their quality of life, so they don’t have to miss out on the moments that truly matter
Meet our care team
Led by experts in allergy and immunology, our care team sees firsthand how allergies affect patients’ quality of life. Their dedication centers on measurably improving each patient’s well-being with innovative, science-backed care and treatments.
Boyan Hadjiev, MD
Dr. Hadjiev, a Board Certified Sinus Specialist, sees, evaluates, and treats patients of all ages. He earned his Bachelor's degree from the University of Michigan and his Doctor of Medicine from Case Western Reserve University. He completed his Residency in Internal Medicine and Fellowship in Allergy and Immunology at Long Island Jewish Medical Center. Dr. Hadjiev strives to provide the highest level of professionalism to each and every patient.
Garima Khanal, PA
David Sanchez, MD
Dr. David Alejandro Sanchez is a Board Certified Allergist practicing in Brooklyn, New York. He is board certified in both Allergy & Immunology and Internal Medicine by the American Board of Medical Specialties.
Dr. Sanchez completed his medical degree at Howard University College of Medicine in 2018, followed by his Internal Medicine residency at Mass General Brigham/Brigham and Women's Hospital from 2018 to 2021. He furthered his training with a fellowship in Allergy and Immunology, where he developed expertise in diagnosing and treating allergic and immunologic disorders.
As part of the Nectar Allergy & Asthma care team, Dr. Sanchez is dedicated to providing comprehensive, evidence-based care for patients with a wide range of allergic conditions and immune system disorders.
Garima Khanal, PA
Dr. Wei Li, MD
Dr. Wei Wei Li specializes in addressing various allergic conditions, such as hives, sinus problems, eczema, and hay fever, focusing on providing expert care and personalized treatment. She earned her Doctor of Medicine degree from SUNY Downstate Medical School and is certified by the American Board of Allergy and Immunology. Dr. Li’s professional expertise and compassionate approach ensure that her patients receive quality care in managing their allergies and achieving a better quality of life.
Garima Khanal, PA
Alex Babazadeh, MD
Dr. Alexander Babazadeh is a Board Certified Allergist who completed his fellowship in Allergy and Immunology at CUNY Downstate Health Sciences Center. He specializes in treating hives (chronic urticaria), eczema (atopic dermatitis), asthma, food allergies, and seasonal and perennial allergic rhinitis (hay fever). Dr. Babazadeh also provides immunotherapy through allergy shots.
Working alongside the Nectar Allergy & Asthma care team, Dr. Babazadeh is passionate about delivering high-quality, personalized care and developing effective treatment plans for patients with allergic disorders.
Garima Khanal, PA
Garima Khanal, PA-C
Garima Khanal is board certified by the NCCPA as a Physician Assistant and is licensed to practice in the state of New York. She earned her Bachelors in Biological Sciences from Arizona State University and Master of Physician Assistant Studies from Northern Arizona University, where she graduated Summa Cum Laude.
Garima is passionate about allergy & immunology and has been working in this field for 4 years. She believes proper treatment and management of various allergic diseases can significantly improve one’s quality of life and is dedicated to providing education to her patients with the utmost care and compassion. She is an active member of the New York allergy and immunology academic community as a member of New York Allergy and Asthma Society (NYAAS), and often attends annual American Academy of Allergy, Asthma & Immunology (AAAAI) and American College of Allergy, Asthma, and Immunology (ACAAI) meetings to keep abreast of new research. In her spare time, she enjoys dancing, working out, traveling and spending quality time with her family and friends.
Garima Khanal, PA
Laura Digiulio, PA
Laura DiGiulio is a licensed Physician Assistant in New York State, holding board certification from the National Commission on Certification of Physician Assistants (NCCPA). She earned her Master's degree in Physician Assistant Studies from the University of Nebraska-Lincoln's Office of Online & Distance Education. Laura also holds a Bachelor's degree from D'Youville University and studied Biology at Hamilton College, providing a strong foundation for her medical career.
Specializing in internal medicine, allergy and immunology, and ear, nose, and throat (ENT) care, Laura focuses on diagnosing and treating a wide range of allergies. Her expertise includes managing chronic allergic conditions and providing immunotherapy.
Laura is dedicated to delivering high-quality, evidence-based healthcare. She actively maintains her certifications and engages in ongoing medical education to stay up-to-date with the latest advancements in her field. Her credentials reflect a strong commitment to patient well-being and comprehensive care.
Garima Khanal, PA
Donna Silvernail, PA-C
Donna Silvernail, PA-C is a nationally certified physician assistant with a passion for delivering high-quality, patient-focused care. She brings years of experience in allergy, and is known for her warm, attentive approach and clear communication style that helps patients feel informed and at ease.
Donna believes in building strong patient-provider relationships based on trust, empathy, and shared decision-making. Whether addressing chronic conditions or acute concerns, she is dedicated to creating personalized care plans that support long-term health and wellness.
Garima Khanal, PA
Our medical advisory board
Our medical board of scientists and clinicians advises and oversees every aspect of our products, to ensure the highest efficacy standards and best treatment that science has to offer.
Shyam Joshi, MD
Dr. Shyam Joshi, MD, is a board-certified allergist and immunologist who serves as Section Chief of Allergy and Immunology at Oregon Health & Science University (OHSU), the state’s only academic medical center for allergy care. He earned his MD from the University of Louisville, completed his residency at Brown University, and undertook fellowship training at the University of Texas Southwestern. Dr. Joshi’s clinical and research interests center on the management of chronic urticaria, food and drug allergies, environmental and seasonal allergies, and severe asthma.
In addition to his academic leadership at OHSU, Dr. Joshi is Chief Scientific Officer at Nectar Allergy, where he advances innovative allergy treatments and research. He is dedicated to improving patient outcomes through evidence-based allergy care, teaching future providers, and developing new approaches to allergen immunotherapy. Dr. Joshi is recognized for his expertise in both pediatric and adult allergy and immunology, and is actively involved in national allergy organizations.
Garima Khanal, PA
Mohamed Shamji, PhD
Dr. Mohamed Shamji is a Professor of Immunology and Allergy at Imperial College London, where he leads the Immunomodulation and Tolerance Group. He specializes in allergen immunotherapy research, with a focus on immune tolerance and biomarker discovery for respiratory and food allergies. Dr. Shamji earned his PhD from Imperial College London in 2010 and is recognized for his expertise in advanced omics technologies and bioinformatics. He currently serves as Secretary General of the European Academy of Allergy and Clinical Immunology (EAACI). Dr. Shamji is an award-winning researcher and mentor, actively involved in developing new immunotherapy approaches and educating future scientists in the field.
He currently serves as Secretary General of the European Academy of Allergy and Clinical Immunology (EAACI). Dr. Shamji is an award-winning researcher and mentor, actively involved in developing new immunotherapy approaches and educating future scientists in the field.
Garima Khanal, PA
Kari Nadeau, M.D., PhD
Dr. Kari Nadeau, M.D., Ph.D., is a leading expert in allergy, asthma, and immunology, currently serving as Chair of the Department of Environmental Health at Harvard T.H. Chan School of Public Health and as the John Rock Professor of Climate and Population Studies. She earned her M.D. and Ph.D. from Harvard Medical School, completed her residency in pediatrics at Boston Children’s Hospital, and specialized in allergy, asthma, and immunology at Stanford University. Dr. Nadeau is internationally recognized for her pioneering research on environmental impacts on immune disorders, particularly in asthma and food allergies, and for her leadership in establishing the Sean N. Parker Center for Allergy and Asthma Research at Stanford University.
Her research focuses on understanding how environmental exposures—such as air pollution and climate change—affect the risk and severity of allergic diseases in both children and adults. Dr. Nadeau has published over 400 papers, is a member of the National Academy of Medicine, and advises major organizations including the WHO and the U.S. Environmental Protection Agency. She is also dedicated to translating scientific discoveries into clinical practice, policy, and public health initiatives to improve outcomes for individuals with allergies and asthma worldwide.
Garima Khanal, PA
John Zwetchkenbaum, MD
Dr. John Zwetchkenbaum, MD, is the chief allergist and founder of Allergy & Asthma Physicians of Rhode Island (AAPRI), with nearly three decades of experience in allergy and clinical immunology. He holds a medical degree from Boston University, completed his residency at George Washington University Hospital, and undertook fellowship training at the National Jewish Center for Immunology and Respiratory Medicine. Dr. Zwetchkenbaum is board certified in Allergy & Immunology and is also certified in Functional Medicine, reflecting his commitment to addressing the root causes of allergic conditions.
With a personal history of severe asthma, Dr. Zwetchkenbaum brings unique empathy and insight into patient care, emphasizing allergen immunotherapy—both subcutaneous and sublingual—as transformative treatments. He is a medical advisor for Nectar Allergy, sharing his expertise in sublingual immunotherapy and helping advance research in the field. Dr. Zwetchkenbaum is recognized for his holistic approach to allergy management, dedication to patient education, and leadership in expanding access to innovative allergy therapies throughout Rhode Island and beyond
Garima Khanal, PA
Our team of industry professionals
Our small but mighty team is made up of experts who come from a diverse range of backgrounds, with over 80 collective years of experience in meaningful healthcare related fields.
Tsega Dinka
Tsega Dinka is a seasoned digital product executive with a robust background in leadership and innovation. Currently serving as the Chief Product Officer at Nectar Allergy, Tsega plays a pivotal role in advancing the company's mission to provide revolutionary allergy care. His expertise lies in developing and scaling digital health solutions that enhance patient experiences and outcomes.
At Nectar Allergy, Tsega leads both the product and marketing teams, driving the development of intuitive, patient-centered platforms that support the clinic’s hybrid care model. His work streamlines access to care, reduces administrative burden, and enables providers to focus more fully on delivering exceptional treatment.
Garima Khanal, PA
Jake VandeMerwe
Jake VandeMerwe is the Vice President of Finance at Nectar Allergy, where he plays a key role in shaping the company’s business operations and strategic direction. With expertise in finance, analytics, and organizational management, Jake ensures that Nectar’s infrastructure supports both sustainable growth and day-to-day efficiency. Jake helps ensure that the clinic runs smoothly, resources are well-managed, and teams are supported in delivering excellent care. His focus on thoughtful planning and operational alignment helps the clinic to provide consistent, high-quality care.
Garima Khanal, PA
Ali Shahabi
Ali Shahabi is the Vice President of Operations at Nectar Allergy, where he drives innovation and operational excellence across the organization. With a sharp focus on delivering seamless care, Ali ensures that providers can operate at peak efficiency and patients receive a high-quality, modern experience. His leadership bridges technology, process, and people, enabling Nectar to scale allergy care in a way that’s both personalized and efficient.
Central to Ali’s role is overseeing the strategic relationships and infrastructure that power Nectar’s operational engine. Behind the scenes, he aligns teams and systems with Nectar’s broader strategic goals, ensuring every operational detail contributes to a streamlined, patient-centered experience. His commitment to operational innovation supports Nectar’s mission to modernize allergy care while empowering providers and delivering real results for patients.
Garima Khanal, PA
Our business advisory board
Advised by industry leaders in consumer products, health services, and patient advocacy, we are primed to bridge the best business practices with the highest quality healthcare.
Take the first step to get over your allergies
