Know More, Sooner: AlloSure Lung
Learn how AlloSure Lung works, what your results may mean, and how CareDx supports lung transplant recipients with specialized monitoring, patient resources, and dedicated care team access.
Medically reviewed by Todd Grazia, MD
Last updated: September 8, 2026
Medically reviewed by Todd Grazia, MD
Last updated: September 8, 2026
What is AlloSure Lung?
AlloSure® Lung is a specialized blood test that monitors your transplanted lung for early signs of injury. It gives your transplant team important information about how your lung is doing—between clinic visits and before symptoms may appear.
How it works
When your transplanted lung is injured or under stress, it releases small fragments of DNA into your bloodstream—called donor-derived cell-free DNA (dd-cfDNA). AlloSure Lung measures the amount of this DNA in your blood.
If the level of dd-cfDNA is elevated, it can be an early sign that your transplanted lung may be experiencing injury. Detecting these changes early can give your care team more time to investigate and act.
In one study, AlloSure identified molecular signs of graft injury that would have otherwise been missed.1
Accessing and understanding your AlloSure results
How do I access my results?
You can access your AlloSure Lung results through the CareDx patient portal. Your results are also shared directly with your transplant care team.
Your transplant team may review your AlloSure Lung results alongside routine lab work, symptoms, imaging, and other monitoring information to help understand the health of your transplanted lung over time.
What do my results mean?
AlloSure gives your doctor a clearer picture of your lung’s health. Your transplant team looks at your individual results as well as how your results change over time.
Questions you may want to ask your care team
What can AlloSure tell you that routine labs or biopsy alone cannot?
How would AlloSure fit into my post-transplant monitoring plan?
How often would I get AlloSure tests?
Getting your AlloSure Lung blood test
AlloSure is a simple, non-invasive blood test that fits easily into your routine transplant care.
Your doctor orders the test
Your transplant team will prescribe AlloSure as part of your monitoring plan.
Your blood draw
A trained phlebotomist draws a small blood sample—usually at a lab, your transplant center, or another convenient location close to you.
Your sample is processed
Your blood sample is sent to a CareDx laboratory, where it is analyzed.
Results go to your doctor
Your AlloSure results are sent directly to your transplant care team, who will review them with you.
Interested in getting your blood draw done at home?
Ask your doctor about mobile phlebotomy. If your transplant center participates in CareDx’s at-home testing program, the CareDx Care Team can help coordinate a licensed mobile technician to come to your home—at no additional cost to you beyond any coinsurance or deductible that may be required by your health plan.
Contact our expert Care Team for personalized support whenever you need it:
Phone: 888-255-6627 | Mon–Fri 8am–7pm ET / 5am–4pm PT
Customer Care Fax: 415-287-2456
Email: customercare@caredx.com
Transplant-focused care
For more than 25 years, CareDx has focused on transplant care. We support transplant patients with specialized monitoring tools, patient support services, specialized pharmacy services, and educational resources designed specifically for the transplant journey.
This deep focus helps us understand the challenges that can come before, during, and long after transplant. Our goal is to help transplant recipients and their care teams feel more informed and confident throughout the journey.
Your transplant journey is ongoing, and monitoring is an important part of protecting the health of your transplanted lung over time.
Commonly asked questions
AlloSure is covered by Medicare when coverage criteria are met. Commercial coverage varies. CareDx can help you understand your insurance coverage, billing, and financial support options.
Keller, M. B., Sun J., Mutebi, C., Shah, P., Levine, D., Aryal, S., Iacono,A., Timofte, I., Mathew J., Varghese, A., Ginder, C., Agbor-Enoh, S. (2021). Donor-derived cell-free DNA as a composite marker of Acute Lung Allograft Dysfunction in Clinical care. Journal of Heart and Lung Transplantation, https://doi.org/10.1016/j.healun.2021.12.009
CareDx is committed to providing scientifically supported educational content for transplant recipients and caregivers. All content is for educational purposes only and is not intended to serve as medical advice or replace guidance from your healthcare provider. Always seek the advice of your transplant team with any questions you may have regarding your specific medical condition.