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Nathaniel Arana Founder & CEO

NGA Healthcare’s principal, Nathaniel Arana, has many years experience in business and in the healthcare field. Nathaniel earned a management degree from the Eller College of Management with an emphasis in operational management and organization. He helped start an out-of-network billing and consulting business from concept to profitability. Thereafter, he managed and grew a healthcare consulting business; under his management, the business dramatically increased its revenues and clients.

Nathaniel started NGA Healthcare because he found that practices were looking for consulting companies that could provide results—not just empty promises. Since then, NGA Healthcare has worked with all specialties to help grow, reorganize and make practices more profitable. Nathaniel regularly contributes to many healthcare business magazines and companies as an expert in practice management. A physician advocate, Nathaniel believes in working directly with his clients to achieve, and surpass, their goals.


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Cameron Wood Head of Client Services & Marketing

Cameron Wood was born and raised in Tucson, AZ, and is glad to be back after fifteen years of living and commuting in Los Angeles. Cameron graduated from the University of Arizona with a focus on Media Arts/ TV and Film Production/ and Business. Cameron worked his way up from assistant Producer to Lead Producer on a variety of TV, Film, New Media, and Web properties; including the Target “Red Room” national concert series/albums, “The Nightmare on Elm Street,” and Head Writer/ Content Producer on CBS’s “Let’s Make A Deal.” Cameron and his wife decided to leave Los Angeles to be closer to family in Tucson (and to start their own). Cameron grew Fresno Unlimited from three employees to over thirty and managed the creation of the SHOWoff application, marketing consulting for Warner Brothers, and the creation of proprietary advanced AI, called “PCH.” After producing and running all advertising for several Fresno Unlimited shows, including the Jimmy Kimmel co-production “Cousin Sal’s Sure Thing,” he joined NGA Healthcare. 

Cameron brings his marketing, operational growth, and client management expertise to an already successful business.  NGA Healthcare’s dedication to maintaining the autonomy and financial stability of small and medium-sized practices also spoke to his personal sense of fairness. Cameron is excited to bring his focus on client communication and marketing to NGA Healthcare, as well as the exciting and industry revolutionizing new ventures NGA Healthcare rolling out in the near future.

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Erika Torres Contracting Manager 

Erika has a diverse background in Network Operations, Provider Servicing and Managed Care Operational Development with over 15 years of experience as a Senior Contract Executive. Erika is both a health and physician advocate, her experience regarding multiple contract negotiations with physicians, specialists and ancillary provider networks is what brought her to NGA Healthcare. Erika grew up in Huntington Station, New York and moved to Lake Mary, Florida in the early 90s where she continues to live today.

Erika’s main focus outside of work is spending time with her nineteen-year-old daughter who was diagnosed with autism at the age of 4. Her diagnosis has ignited a fire for Erika; spreading awareness, providing education and fundraising efforts for the cause. 

Erika is excited to bring her experience with the insurance payers to NGA, she accepts every day as an opportunity to grow and develop into a stronger professional taking chances and never-ceasing the opportunity.



Lee Allen  Project Manager

Lee was raised in Orlando, Florida and graduated from Elon University in North Carolina. After completing his undergraduate studies, Lee joined the United States Peace Corps. Lee lived in Morocco for almost 3 years working on engineering, health and youth-related projects. After the Peace Corps, Lee worked in non-profits and completed his graduate studies from the University of Arizona.

Lee has a background in marketing and communications with both Starbucks Coffee Company and Apple Inc. around their corporate social responsibility and value oriented efforts. His experience regarding community impact and client relations has brought him to NGA healthcare. Lee is a health and physician advocate, hoping to bring innovative resources, community members, and health providers together.


Lisa M Aguilar Credentialing Manager

A southwest Arizona native, born and raised in Tucson, AZ. Lisa has over 30 years of healthcare management experience in physician private practice and hospital patient access management. Her healthcare management experience provides her with a strong devotion to our NGA healthcare clients/providers with knowledge and understanding of Insurance companies credentialing requirements. 

Lisa enjoys the challenge of working with the insurance companies. She finds fulfillment after receiving those notifications that our provider enrollment dates are effective and everyone is properly loaded. 

Favorite Quote: Be true to yourself and grateful for the new day!


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Garrett Brown Credentialing Specialist

Garrett began his career in healthcare volunteering at a pediatric clinic ensuring that the patient's time was comfortable and welcoming. This experience paved the way for his work in hospital administration and coordination. As a hospital administrator, Garrett was at the forefront of implementing a new coordination system to simplify physician workflow.

Garrett knows what it means to be a physician advocate and is committed to the cause as a credentialing specialist for NGA Healthcare. Not a day goes by that Garrett doesn’t feel proud to be part of something that has a profound impact on the healthcare marketplace. Garrett lives in Tucson, Arizona, and holds a B.S. in Public Health from the University of Arizona.


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Jennen Maryniak Contracting Team Lead and Analyst

Originally from Alberta, Canada, Jennen has lived most of his life in Arizona and has recently graduated from the University of Arizona with a major in Information Science and Technology as well as a minor in Japanese. Jennen has worked on projects that have included data mining, creating and stabilizing databases, and data pipelines.

Even after graduation, Jennen strives to learn more and continue growing as a person both personally and professionally. Joining NGA Healthcare has given Jennen the chance to continue his growth as well as allow him to help out many private practices and to better the health care system. His role at NGA is to help with contract negotiations, perform analyses, and write propositions in order to aid the private practices.

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Lily Androsiglio Sales and Marketing Coordinator

Born in China and raised along the Jersey shore, Lily brings her marketing and healthcare background to the NGA team. Lily became an EMT in high school and during her undergraduate studies at Rutgers University, she was able to help local businesses grow and scale their companies. There, she fell in love with marketing and graduated with her degree in communications.

Lily recently moved out to Tucson with the hopes of continuing her professional journey while enjoying the warm weather that Arizona provides. After years in the digital space, Lily was ready to return to her roots in healthcare. She is passionate about the goals and mission and is excited to bring her client-relationship skillset and marketing background to NGA Healthcare.