About Us

About Us

Meet the Team

Dr. George J. Rivello, DPM, FACFAS

Founder | Foot & Ankle Surgeon
Dr. Rivello is a board-certified podiatrist and surgical specialist with over a decade of experience treating complex foot and ankle conditions. From advanced diabetic wound care to reconstructive surgery, he blends technical excellence with a deep commitment to patient outcomes. His leadership anchors Rivello Medical Group’s mission: innovative care, delivered with heart.

Dr. Firas Y. Naji, DO

Internal Medicine Physician
With over 13 years of clinical experience, Dr. Naji brings broad expertise in chronic
disease management, including heart failure, kidney disease, and asthma. A graduate of the University of New England College of Osteopathic Medicine and former resident at Cambridge Health Alliance, he is a trusted primary care provider who delivers personalized, whole-person care across all adult age groups.

Geoffrey De Castro, ACNP-AG, CCRN, CSC, CMC

Nurse Practitioner | Advanced Wound Care Specialist
Geoff De Castro is a veteran acute care provider with 20+ years of critical care experience and a laser focus on wound care excellence. As a leader in advanced healing therapies, he treats complex surgical, vascular, and diabetic wounds—delivering results that restore mobility and preserve limbs. Geoff’s approach blends top-tier clinical precision with compassionate, hands-on patient engagement.



Mission Statement and Values of Rivello Medical Group

To provide high-quality, accessible podiatric and advanced wound care to underserved and at-risk populations in Eastern and Central California, ensuring enhanced mobility and improved health outcomes directly at their places of residence or care.

Frequently Asked Questions (FAQs)

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