Connecting
Old-School Wisdom with Modern Functional Medicine
Welcome to
Sierra Botanica & Collaborative Medicine
Integrative and functional medicine with custom herbal care focused on strengthening the body, improving resilience, and supporting complex conditions, including integrative cancer support, through personalized, data-informed strategies.
At Sierra Botanica, we bring together the best of both worlds - modern diagnostics and functional medicine alongside centuries of herbal tradition - to heal the whole person, not just treat their symptoms.
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Led by Oscar Sierra, L.Ac., RH, our approach is precise, rooted, and personal. For those navigating chronic illness, cancer, or unanswered questions, we offer more than a new protocol - we offer a new rhythm. A place to let go of the pain and hold on to the rhythm of healing that’s already within you.
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Whether you’re continuing care or beginning a healing journey, this is where clarity, connection, and deeper healing begin.
Explore Sierra Botanica's Services
At Sierra Botanica, Oscar blends the wisdom of traditional healing with the precision of modern functional medicine. Whether you're seeking ancient practices or data-driven insight,
his personalized approach helps you uncover the root causes of imbalance
and move toward lasting wellness. It’s a personalized, thoughtful approach that honors both the science and the spirit of healing.
When I had my first session with Oscar I was extremely impressed with his ability to identify problem areas and recommend natural protocols to address them. I was apprehensive about acupuncture, but it was just one part of many protocols he addressed, and felt so natural and easy, and it relieved pain immediately. I look forward to working with him in the future, and feel hopeful about addressing health problems adequately for the first time in years.
-C.S.
I have visited many acupuncturists from the US and abroad. I’m big on holistic health and alternative medicines. My case is a pretty complex auto immune condition and Oscar not only took the time to listen to me and wrap his head around what I’m going through, but he is working in cohesion with my N.M.D’s treatment And helping me in my healing journey. I’m thankful to the higher powers for letting meet and work with Oscar. This man is passionate and knows his craft. Highly recommended!
-A.R.
I have recommended Sierra Botanica to a number of my friends who continue to seek out Oscar’s advice and guidance towards their health. Meeting and working with Oscar Sierra continues to be one of those magic high points in my life. To find a practitioner who can guide you into your own power to engage with the ability of the body and spirit to actively and consciously participate in one’s own health and healing has been a blessing for me. I am grateful for Mr. Oscar Sierra.
-A.K.
Oscar and his team are truly dedicated to your wellness and health. Acupuncture, herbs, tinctures, supplements have made an enormous difference in my health in so many ways, from treating low blood pressure to helping to manage chronic pancreatitis. I highly recommend Oscar and his team.
- M.R.
Patient Portals
More Data, Better Outcomes
When it comes to cancer care, we combine modern diagnostics with time-tested herbal medicine to understand what is happening beneath the surface and build a plan that fits you.
Most systems focus on what is easy to see. Imaging, biopsies, standard labs. That information matters, but it often misses what is driving the process. We take a deeper look.
Using a framework rooted in the Eclectic Triphasic Medical System (ETMS), we analyze multiple layers of data, from immune function and inflammation to nutrition, hormones, and advanced markers like circulating tumor DNA and molecular profiling.
In cancer care, this matters.
Better data allows for more precise support. It helps guide how your body is prepared for treatment, how it responds, and how we adjust along the way to improve tolerance and overall outcomes.