Skip to content 
About Us
Preva Aesthetics is a Nurse Practitioner owned and founded aesthetics practice specializing in the delivery of natural and preventative aesthetic treatments catered to enhancing and maintaining your natural beauty.
Using our unique top-of-the-line technique created by our founding nurse practitioner Michelle Paty, we turn back the clock for our clients and give them youthful and glowing skin. Our job is to make you look like you, just the version that sleeps 12 hours a night, takes your vitamins, and drinks your green juice! The version of you that glows.
We attract clients who love a natural but flattering look so if that’s you, come meet us in the chair!
Michelle Paty
OWNER & LEAD INJECTOR, MSN, CPNP-AC, FNP-C
MSN, CPNP-AC, FNP-C
After spending the first part of her career in pediatric ICU medicine, Michelle discovered her passion for beauty and holistic health. Her passion is helping women look and feel radiant and youthful and she has developed her own aesthetic technique and style to deliver a natural look, prioritizing long term skin health using subtle preventative enhancements. Michelle loves to share her knowledge on digestion, holistic health hacks, vitamins to optimize anti-aging, herbs, juicing, etc! So don’t be surprised if you come for the botox but leave with some health tips! After all, looking radiant has to start from within.
Allie
NURSE INJECTOR
MSN, CPNP-AC, FNP-C
Torri
NURSE INJECTOR
MSN, CPNP-AC, FNP-C
Torri is a Registered Nurse Injector at our Encinitas location. Prior to her extensive 1:1 training under owner and founder Michelle Paty CPNP FNP-C, Torri worked in the OR, specializing in facial plastic surgery. This experience lended itself to a deep understanding of facial anatomy that she now applies in her work at Preva, ensuring all her clients receive the safest and best treatments and possible! Known for her gentle touch, Torri excels at making clients feel comfortable and at ease while delivering results that leave them feeling refreshed, glowing and like the highest and best version of themselves! She loves designing customized plans for each of her clients that help them achieve all their aesthetic dreams. She originally began at Preva Aesthetics in her hometown of Denver, but mid 2024 made the transition to our Encinitas location where she spends her spare time surfing, hiking with her golden retriever, and scouring farmers markets.
Dr. Castillo
Medical Director- Encinitas
MSN, CPNP-AC, FNP-C
Dr. Castillo has a uniquely well-rounded perspective in the business and delivery of healthcare. Passionate about encouraging the persistent evolution of our healthcare system not only from the patient experience pathway but also from the physicians’ perspective, as they are the key to improved health outcomes and the abolition of racial disparity in healthcare. With more than two decades of experience, Dr Castillo has developed an expertise in functional and regenerative medicine. His studies in nutrition science have been the perfect infrastructure for an obsession with root-cause medicine. Dr Castillo is committed to helping everyone he comes in contact with achieve their health potential. A better tomorrow starts with a simple choice today!
CAMILLE
NURSE PRACTITIONER INJECTOR
MSN, CPNP-AC, FNP-C
McKenzie Barnes
RN, BSN
MSN, CPNP-AC, FNP-C
McKenzie is a registered nurse injector at Preva. She grew up in the Bay Area and always knew she wanted to pursue a career that blended creativity with connection. After earning her nursing degree, she went straight into the aesthetic field, driven by a passion for helping others look refreshed and genuinely feel confident in their skin. Her background as a regional clinical trainer has shaped her into a highly skilled injector with a deep understanding of facial anatomy, and a love for educating her patients. When she’s not at Preva, McKenzie teaches hot mat Pilates that brings the same focus on alignment into her overall philosophy of beauty. Whether someone is starting their aesthetic journey or looking for elevated, natural refinement, McKenzie is known for making the experience warm and collaborative from start to finish.
Lo Tieri
M.S., BSN, RN
MSN, CPNP-AC, FNP-C
Lo is a Registered Nurse Injector at Preva Aesthetics Denver, trained 1:1 under owner and founder Michelle Paty, CPNP, FNP-C, in her signature preventative and natural aesthetic technique. Lo holds dual bachelor’s degrees in Nursing and Business, as well as a master’s degree in Nutrition and Dietetics, giving her a unique, wellness-driven approach to facial aesthetics.
Known for her humor and quick wit, Lo brings a warm, lighthearted energy to every appointment. Patients can expect to leave not only glowing, but laughing. Her background in medical aesthetics and passion for health and anatomy allow her to create subtle, natural results through thoughtful, personalized treatment plans.
Originally from the Chicago suburbs and now a longtime Colorado resident, Lo spends her free time mountain biking, camping, snowboarding, and doing all things beautiful Colorado has to offer.
