Learn more about the team at M.D. Laser Studio.

Alissandro "Andy" Castillo, MD, MBA

Medical Director

Dr. Andy Castillo is the owner and Medical Director of M.D. Laser Studio. He is a board-certified physician with extensive dermatological and surgical training. His education includes a BS from the University of Maryland, an MD degree from Wake Forest University, and an MBA from Duke University Fuqua School of Business. While serving in the United States Army as a flight surgeon he also successfully completed a plastic and reconstructive surgery research fellowship at prestigious Johns Hopkins. A Fellow of the American Society for Laser Medicine and Surgery, Dr. Castillo has participated in the Constitution & Bylaws Committee, Audit Committee, and Strategic Planning Committee. With his extensive expertise on such a wide variety of equipment, he is often called upon to train others in laser procedures. He has served as a Luminary for Laserscope/Iridex, has trained and spoken on behalf of Medicis, the provider of Restylane, Perlane, and Dysport, and is a Platinum Plus-Level Provider of Botox and the Juvederm family of products for Allergan.

Rebecca Appleton Castillo, MD, MS

Co-Founder & Co-Medical Director

Dr. Appleton, the wife of Dr. Castillo, is a board-certified physician, a Fellow of the American Society for Laser Medicine and Surgery, and a Member of the International Society For Hair Restoration Surgery. She earned a BS from Duke and MS from the University of Maryland. At the University of Maryland Medical School, Dr. Appleton earned her MD. She and Dr. Castillo have raised six children in the Lake Norman area and are actively involved in their community.

Dr. Appleton and Dr. Castillo operate M.D. Hair Restorations through M.D. Laser Studio and are both Members of the International Society For Hair Restoration Surgery. They recently opened Encore Nurses, a concierge Botox service currently available in Charlotte and around Lake Norman. For more information about Encore Nurses, visit

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Heather Penley, RN

Laser Nurse Specialist

A true North Carolina girl, Heather was born and raised in Salisbury. She got her BA from University of North Carolina in Wilmington. Heather worked at M.D. Laser Studio early on as a Treatment Coordinator, and went on to earn her nursing degree. Heather eventually returned to M.D. Laser Studio bringing her skill, positive attitude, and over 12 years of experience as a Registered Nurse with her.

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Caitlin Bostick, BSN

Laser Nurse Specialist

Caitlin worked at M.D. Laser Studio while she was in high school and college. She earned her BSN from Clemson University in 2007. In 2015, Caitlin returned to M.D. Laser Studio to train with Dr. Castillo as a Laser Nurse Specialist. She is also a Member of the American Society for Laser Medicine and Surgery. A native of Charleston, Caitlin now calls Uptown Charlotte her home. In addition to nursing, Caitlin also participates in testing M.D. Laser Studio products and services.

Sarah Stein

Office Manager

Sarah was among the first to graduate Lake Norman High School, and went on to earn a degree from UNC in Charlotte. Sarah has been with M.D. LaserStudio in various capacities since August 2005. Sarah is our Office Manager and at the heart of M.D. Laser Studio, keeping everything running smoothly and efficiently. She speaks fluent Spanish ~ se habla Español!

Sara Gray

Treatment Coordinator

Sara graduated from the University of Mississippi and taught third grade for 10 years. After staying home to raise her son for 8 years she is now back to work, and we were lucky enough to have her join us at M.D. Laser Studio! When she's not assisting patients and supporting the medical staff at MDLS, Sara enjoys shopping, working out, and spending time with family.

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Jen Heller

Treatment Coordinator

Jen joined the M.D. Laser Studio staff in 2015 as a Treatment Coordinator and soon became an invaluable member of the staff. When she isn't raising our spirits, Jen is busy raising two sons in the Lake Norman area. Like all of the staff at M.D. Laser Studio, Jen is testing products and contributing to the establishment of procedure protocol.


Sherry Aley, LPN

Treatment Coordinator and Licensed Practical Nurse

Born and raised in North Carolina, Sherry and her husband spent 9 years in Phoenix, Arizona before deciding to return to NC to raise their two sons. Sherry enjoys gardening and boating and is loving the lake life! She is actively testing and training on procedures at M. D. Laser Studio, including one of our newest procedures: ThermiVa.

Alarie Stone, RN

Laser Nurse Specialist & Treatment Coordinator

Alarie has worked in the medical field for over 17 years, many of those with Dr. Castillo and Dr. Appleton. A native southerner, Alarie graduated from Mitchell Community College with a degree in Medical Assisting, and recently earned her RN degree. We're excited to see Alarie expanding her responsibilities at M.D. Laser Studio!

Kate Lassiter web.jpgKate Lassiter

Treatment Coordinator

Kate grew up in Connecticut, went to school in California, spent a year in Switzerland, and moved to North Carolina in 1992. She raised 3 boys in the Lake Norman area and eventually became an instructor at Pure Barre, where she continues to teach part-time. Kate joined M.D. Laser Studio in February 2017 and has already begun skin rejuvenation education and testing.


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Rita Aldridge

Marketing Director

Rita has been with M.D. Laser Studio almost since the beginning. She handles all the media, writes and designs the ad campaigns, and hosts events at the Laser Studio. Rita graduated from Southern Illinois University in Carbondale with a degree in Commercial Graphic Design and has worked in advertising and marketing ever since. Rita is also a published author and editor. You can reach Rita by email at

John Mairs

IT Specialist & Web Administrator

John joined M.D. Laser Studio in 2006. He is host and administrator for our website and manages all computer hardware and software. At a very early age, John discovered his passion for technology and has pursued a career in that industry ever since. In addition to his responsibilities with M.D. Laser Studio, Encore Nurses, and Passport Health, John is the Technology Director at American Renaissance School.