ONYX

THIS IS

ONYX Wellness & Aesthetics

WELCOME TO

ONYX is a medical boutique where beauty, wellness, and innovation come together. We specialize in anti-aging treatments through the highest quality cosmetic and aesthetic injectables, including Botox, Dysport, Xeomin, Daxxify, dermal fillers, Kybella, Sculptra, PRF, and PDO threading.

Our mission extends beyond aesthetics—we’re dedicated to achieving optimal skin health using medical-grade products and evidence-based procedures such as RF Microneedling with Sylfirm X, CoolPeel by Tetra Pro, and Derma-Facials by SKNLAB.

To complement our aesthetic services, ONYX’s wellness providers offer a holistic approach to health. Our functional medicine and weight management solutions include GLP-1 therapy, customized supplement plans, and tailored strategies to help you feel your absolute best inside and out.


At ONYX, we value client relationships. Your journey begins with a one-on-one consultation where we listen to your goals and develop a customized plan tailored to your unique needs. Our highly trained team specializes in restoring volume loss, rejuvenating your skin, and enhancing your natural beauty to create a refined, refreshed, and balanced look.

Discover the difference of ONYX, where aesthetics and wellness are elevated to help you look and feel your most radiant.

ERICKA MARSHALL, FNP-BC, Owner

SERVICES

(615) 626-7905

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TESTIMONIALS

  • “I’ve been seeing Ericka for almost a year & I am blown away by her attention to detail, her genuine concern for my overall health & well-being — and, her professional demeanor. She goes above & beyond to serve her clients, and is definitely one of the best Nashville has to offer! Bonus: her practice offers a boutique-style ambience & is centrally located!”

    J.P.

  • “I cannot say enough great things about Ericka! She takes her time with each client & genuinely listens to our concerns & needs. She is extremely knowledgeable and I trust her recommendations. She’s a pro with PDO threads & my go-to for Botox & microneedling. She goes above & beyond with each client and I look forward to every appointment that I have with her. I highly recommend, Ericka!"

    D.S.F.

  • “I was hesitant to begin the medical weight loss program, but heard from two people that Ericka was trustworthy. This couldn’t be more true! Not only did I begin regular injections, but Ericka also provided me with wellness coaching & made sure that I was implementing healthy sustainable routines throughout the entire process. I’ve lost over 30 lbs & have never felt more like myself! This program has not only helped me physically, but also — in love, work, but most of all — self confidence!”

    C.F.

  • "I wholeheartedly recommend Onyx Wellness & Aesthetics- having been a client of Ericka’s for several years, I can confidently say she is a true master of her craft. Her extensive skills in aesthetics not only enhance natural beauty but also promote overall wellness, creating results that feel authentic and lasting. Ericka’s holistic approach ensures that every treatment is tailored to individual needs, making me feel understood and supported throughout my journey."

    L

  • "Erika is an incredible nurse practitioner who specializes in injectables. Would highly recommend her."

    L.W.

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