Operational partners practices can actually rely on.

Allison Lewis is an AAPC Certified medical biller with over 11 years of experience working across the full revenue cycle for multi-specialty, multi-state healthcare practices. Throughout her career, Allison has managed claims, denials, accounts receivable, credentialing, payer compliance, and operational billing workflows inside a wide range of EHR systems. She has extensive experience stepping into practices that are understaffed, overwhelmed, or struggling with reimbursement issues and helping create more stable, organized revenue cycle operations.

At Zavisa RCM, Allison leads day-to-day operations with a strong focus on communication, accountability, and compliance-first billing support. She believes practices deserve responsive partners who are accessible, transparent, and genuinely invested in the success of the organizations they support.

Outside of work, Allison is a proud cat mom to her ragdoll kitten, Cali, and enjoys roller skating, creative projects, and finding ways to bring a more personal, human approach to the healthcare operations world.

Yaimina Martinez is a highly experienced healthcare consultant and revenue cycle management professional with more than 30 years of expertise in medical billing, coding, claims management, credentialing, and healthcare operations. As a key member of Zavisa RCM, Yaimina specializes in helping healthcare providers optimize revenue cycle performance, improve reimbursement accuracy, and maintain compliance with industry regulations.

Throughout her career, Yaimina has worked with hospitals, specialty clinics, urgent care centers, family practice groups, and healthcare organizations across the United States. She has extensive experience with both inpatient and outpatient coding, denial management, provider credentialing, insurance verification, authorizations, and revenue cycle audits. Her background includes working with leading EMR and billing platforms such as Epic, Cerner, Athena, Meditech, NextGen, 3M/3M 360, Waystar, and MD Suites.

Yaimina holds certifications in Medical Billing, Coding and Medical Assisting, along with a Bachelor of Business Administration. Her strong combination of clinical knowledge, operational expertise, and business management allows her to deliver customized solutions that help providers improve workflow efficiency, maximize revenue, and enhance patient satisfaction.

At Zavisa RCM, Yaimina is dedicated to providing reliable, detail-oriented, and results-driven support to healthcare organizations of all sizes. Her passion for healthcare administration and commitment to excellence make her a trusted partner for providers seeking dependable revenue cycle management solutions.

Outside of work, Yaimina enjoys spending quality time with her adult children, traveling, volunteering at VA centers, caring for plants, and participating in outdoor activities. Her passion for helping others extends beyond healthcare and into her personal life, where she values community involvement, wellness, and creating meaningful connections.

Amy Williams brings years of experience supporting healthcare organizations through revenue cycle operations, provider support, workflow improvement, and operational strategy.

Throughout her career, Amy has worked across multiple areas of healthcare operations including revenue recovery, provider relations, compliance support, practice management consulting, and operational improvement initiatives. She is passionate about helping organizations create stronger systems that support both financial stability and quality patient care.

Amy joined Zavisa RCM with the shared belief that healthcare organizations deserve more than transactional billing support. She believes practices benefit most from having responsive, knowledgeable partners who understand the operational and financial challenges providers and office teams face every day.

At Zavisa RCM, Amy focuses on building reliable operational partnerships that help practices feel supported, organized, and confident in their revenue cycle processes.

Outside of work, Amy enjoys playing video games, connecting with friends, and spending quality time with the people closest to her. Her passion for healthcare extends beyond day-to-day operations, as she values building supportive relationships and helping organizations succeed