NHMA Florida Chapter

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Chapter Leadership

Serguei Castaneda, MD

Chapter Chair

Dr. Serguei Castaneda is a dual board-certified physician in Radiation Oncology and Internal Medicine. Originally from Colombia, he earned his medical degree from the Universidad de Antioquia and completed advanced research training at Harvard University, Massachusetts General Hospital, Boston University, Memorial Sloan Kettering Cancer Center, and the University of Pennsylvania.

He specializes in conditions treated with radiotherapy, with a focus on theranostics and clinical trials as a site Principal Investigator. His work reflects a strong commitment to compassionate, evidence-based care and global health, alongside dedicated leadership within NHMA.

Luis Isea Mercado, MD, FACP

Chapter Chair Elect

Dr. Luis Isea is an Internal Medicine physician serving his community as a Primary Care Physician at AdventHealth Orlando, with a focus on Men’s Health and Cancer Survivorship. Originally from Caracas, Venezuela, he completed medical school there before immigrating to the U.S. in 2015 to pursue his Internal Medicine residency at AdventHealth Orlando.

Dr. Isea is deeply committed to advocacy, physician well-being, and equitable representation within the medical workforce. He holds leadership roles in the American College of Physicians (ACP) and NHMA, working to address health inequities impacting underrepresented communities and to elevate opportunities for IMGs and early-career physicians.

To contact the chapter or its co-leaders, please email [email protected].

Chapter Mission

Our mission is to empower and elevate Hispanic physicians and other health care professionals in Florida by building a strong professional network, providing mentorship and guidance to Latino medical students, International medical graduates, Early career physicians and health care professionals. We are committed to improving the health of Hispanic and underserved populations by raising awareness of health care disparities and conditions that disproportionately affect our communities. Through education, advocacy and social media outreach, we aim to support Hispanic health care professionals and patients, fostering a sense of belonging and helping our community thrive.

Chapter Member Spotlight

NHMA Florida Honors Dr. Luis Isea Mercado for Outstanding Leadership

The NHMA Florida Chapter is proud to spotlight Dr. Luis Isea Mercado, recently awarded the 2025 “Internist of the Year” by the American College of Physicians Florida Chapter. This honor recognizes outstanding leadership and dedication to the practice of Internal Medicine.

Dr. Isea has demonstrated a deep commitment to advancing the profession in Florida through advocacy, leadership, mentorship and community engagement, with a strong focus on inclusion and diversity within the physician workforce. He serves in key leadership roles within the ACP Florida Chapter and is a member of the ACP National Council of Early Career Physicians, continuing to champion opportunities for trainees, IMGs and early-career physicians.

We congratulate Dr. Isea on this well-deserved recognition and celebrate his ongoing impact on the Internal Medicine community.

Upcoming Events

March 20, 2026 | NHMA Chicago Chapter: Nutrition Misinformation Virtual Town Hall

Virtual Event | 12:00 PM CT

Join the NHMA Chicago Chapter for the Nutrition Misinformation Virtual Town Hall, an engaging and informative session focused on addressing the spread of nutrition myths and misleading health claims online.

A panel of physicians and registered dietitians will discuss trending topics such as seed oils, artificial dyes and viral diet claims while sharing practical strategies to identify misinformation and highlight trusted evidence-based nutrition resources.

Participants will gain tools to navigate confusing nutrition messages, support informed dietary choices and promote science-based nutrition guidance in their communities.

Join the webinar: bit.ly/NHMAChicagoNutrition

Past Events

NHMA National Latino Physician Day Congressional Briefing

September 2025 | Washington, DC

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Chapter Resources

Chapter Leader Resources

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This page includes key resources for Chapter Leaders with links to required forms, event planning tools and membership materials to help manage and promote Chapter activities throughout the year.