About

WE BELIEVE

There’s a

You deserve a faster diagnosis, expert guidance, and a smoother process.

That’s why we’re Defiant.

better

way

You deserve a faster diagnosis, expert guidance, and a smoother process.

That’s why we’re Defiant.

The system is broken. Defiant helps you get the right care, faster.

Few experiences are as dreaded as your doctor telling you there may be a problem, as disorienting as the wall of jargon alongside a medical test result, or as frustrating as trying to navigate the healthcare system when you just want answers.

And too many people have to figure it all out on their own.

Defiant was founded to make the process of diagnosis and finding treatment simple. We take the burden of logistics, offering expert guidance and straightforward pricing. That means less confusion and stress, empowering you to focus on what matters and make informed decisions about your care.

317K

estimated new breast cancer cases in women in 2025

Source: American Cancer Society

100 DAYS

median number of days to breast cancer diagnosis

Source: Journal of Managed Care + Specialty Pharmacy

8%

increase in risk of  death with each month of delay to breast cancer surgery

Source: British Medical Journal

9-26%

diagnostic error rate for breast cancer cases

Source: Diagnosis

we are defiant

We’re not satisfied with the status quo. Everything we do is designed to improve your experience with cancer diagnosis through personalized care.

Expert care, accelerated

We cut through the barriers that delay diagnosis and treatment, because everyone is entitled to an accurate understanding of their health and a rapid path to action.

Always in your corner

You don’t have to do this on your own. We recognize that every patient journey is unique, and champion personalized guidance with reliable support every step of the way.

Devoted to excellence

We celebrate innovative, evidence-based approaches to healthcare, and work with Dana-Farber Cancer Institute to ensure diagnostic protocols are grounded in the latest expertise.

Standard care

Diagnosis in days, not months, beginning with a same-day consultation

Expert guidance throughout the diagnostic process

Logistics and paperwork handled so you don’t have to do it yourself

Initial imaging and biopsy completed in one visit, in most cases

Help finding the right oncology team for you, should you need one

Smooth transition to your oncology team, reducing the time to treatment

our DOCTORS

Meet Dr. Christina Palmer

Dr. Christina Palmer is a board-certified primary care physician with over a decade of experience. She’s dedicated to making expert care more accessible, focusing on early detection, prevention, and timely treatment—especially for complex conditions and cancer care. She combines primary care with the latest technology to help patients get answers faster.

She earned her medical degree from the University of Pennsylvania and trained at UCSF. Licensed nationally, she’s committed to guiding patients through every stage of their health journey.

Outside of work, Dr. Palmer enjoys hiking, running, and spending time with her family.

Meet Dr. Payal Srinivasa

Dr. Payal Srinivasa is a board-certified OB/GYN and physician leader with 15 years of experience. She’s passionate about improving patient access to high-quality, evidence-based care, with a focus on trauma-informed care and health equity.

She has helped patients through life’s most joyful and challenging health experiences and is an advocate for using technology to enhance care—without losing the human touch.

Dr. Srinivasa earned her medical degree from Boston University and a Master’s in Health Care Innovation from the University of Pennsylvania. She’s received awards for patient experience and medical education.

When she’s not working, she enjoys cooking, traveling with her family, and running (slowly!).

Defiant is supported by Dana-Farber Cancer Institute—a global leader in cancer care

For over 75 years, Dana-Farber Cancer Institute has had one goal: to reduce the suffering caused by cancer through advanced clinical care and scientific research. As a teaching affiliate of Harvard Medical School, Dana-Farber attracts many of the best and brightest physicians and researchers in the world to share in this mission. Dana-Farber is a founding member of the Dana-Farber/Harvard Cancer Center, a National Cancer Institute (NCI)-designated Comprehensive Cancer Center. 

Defiant leverages Dana-Farber’s world-class expertise to ensure that your journey with Defiant is powered by Dana-Farber best practices. All clinical services are provided by Defiant Health and its other partners.

CAREERS

Our team is growing

Defiant Health is on a mission to make the process of diagnosis and finding treatment for breast cancer simpler, with expert guidance and a commitment to excellent care.

Virtual Primary Care or Women's Health Physician

MA Licensure

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Link here

Virtual Registered Nurse, Breast Health

MA Licensure

Patient Care Concierge, Admin Coordinator Breast Health

South Shore, MA (Hybrid)