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Meet our team
All of our staff's lives have been directly affected by a thyroid issue.We partner with you to help you get your life back from your thyroid condition. We're not only skilled professionals, we're Modern Thyroid Clinic patients ourselves, and have been on the same journey you're on right now.

Clinical Leadership

McCall McPherson PA-C

CEO - Founder

Meet the heart behind Modern Thyroid Clinic—McCall McPherson, a provider who’s walked in your shoes and built a clinic to change lives.
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Cassie Smith, MD

Chief Medical Director

Dr. Cassie combines clinical precision with personal insight to lead Modern Thyroid Clinic’s medical team with expertise and heart.
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Katie Keller, DO

Chief Medical Officer

Dr. Katie leads with clinical insight and whole-person care, helping Modern Thyroid Clinic redefine how thyroid and hormone health is approached and treated.
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Shawn Tassone, MD, PhD

Chief Medical Officer

Dr. Shawn is a pioneer in integrative women’s health, blending traditional medicine with mind-body healing to deliver transformative care.
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Clinical Team

Yari Tran, PA-C

Clinician

Yari brings curiosity, compassion, and a whole-person approach to her role as a clinician at Modern Thyroid Clinic, helping patients uncover and address the root causes of their symptoms.
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Laurie Hutcherson, PA-C

Clinician

Laurie blends a rich clinical background with a global perspective, helping patients uncover root causes and reclaim wellness through personalized, functional care.
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Melody Volz, FNP-C

Clinician

Melody brings both clinical expertise and personal experience to her thyroid and hormone care—offering patients individualized support rooted in empathy and science.
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Hillary Mayers, DNP, FNP-C

Clinician

Hillary Mayers, NP, combines advanced training, personal experience, and heartfelt commitment to help patients reclaim their lives from thyroid and hormone dysfunction.
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Brandy Valentino,RN, WHNP, CNM

Clinician

Brandy brings deep expertise and heartfelt dedication to her work—helping women achieve lasting wellness through compassionate, root-cause care.
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Nikki Abelow, APRN

Clinician

Nikki blends clinical experience and personal insight to deliver compassionate, root-cause care that empowers patients to reclaim their health and well-being.
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Jessica Strauss, DNP, FNP-C

Clinician

Jessica brings a thoughtful, patient-first approach to thyroid and hormone care—empowering individuals to feel seen, understood, and fully supported on their health journey.
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Krystal Adams, MSN, FNP-BC, LSO

Clinician

Krystal Adams is a board-certified Family Nurse Practitioner with a strong foundation in both conventional and integrative medicine.
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Ann Tucker

Health Coach

Ann Tucker is a compassionate Health Coach, helping patients feel supported, empowered, and confident as they take charge of their health and wellness journey.
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Mariah Hall

Health Coach

Mariah brings over a decade of clinical experience and a passion for functional medicine to her role—offering patients personalized care rooted in empathy, education, and whole-body wellness.
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Ashley Stuver, MS, INHC

Health Coach

Ashley brings a compassionate, evidence-informed approach to her role as a Health Coach at Modern Thyroid Clinic. She has a background spanning functional nutrition, herbal medicine, and wellness coaching.
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Evan Chase, CPT, PPCES

Health Coach

Evan brings a warm, grounded, and deeply supportive approach to her role as a Health Coach at Modern Thyroid Clinic. Her background spans personal training, holistic health coaching, and nutrition.
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Hannah Morales

Medical Assistant

Hannah brings a warm, patient-focused approach to her role as a Medical Assistant at Modern Thyroid Clinic. With a background rooted in both women’s health and aesthetics, she offers a unique blend of clinical expertise and genuine compassion.
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Caroline Zavala

Medical Assistant

Caroline Zavala supports both operations and patient care at Modern Thyroid Clinic, bringing focus, drive, and a passion for functional medicine to every detail of her work.
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Cerena Coombs

Medical Assistant

Cerena brings a deep passion for health, wellness, and supporting women through every stage of life to her role at Modern Thyroid Clinic, helping patients feel seen, heard, and cared for.
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Hannah Skalski

Director of Weight Loss Operations & Pharmacy Programs

Hannah leads Weight Loss Operations and Pharmacy Programs at Modern Thyroid Clinic with heart, precision, and a mission to help patients feel informed, supported, and empowered in their care.
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Sally Sykes

Weight Loss Program Director

Sally brings a wealth of knowledge and personal passion to her role—empowering patients to reclaim their health through education, lifestyle change, and sustainable weight loss.
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Administrative Team

Hayley Adams

Chief Operating Officer

Hayley brings both personal experience and professional passion to her role as COO, helping patients navigate healing with clarity, empathy, and purpose.
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Joy Blackburn

Project Manager, Executive Assistant

Joy is the organizational heart of Modern Thyroid Clinic—bringing focus, compassion, and a can-do spirit to everything she does.
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Amelia Stephens

HR & Operations Manager

Amelia is a skilled HR and Operations Manager with over a decade of experience, providing thoughtful, compassionate support to patients navigating thyroid care and chronic illness.
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Romé Smith

Executive Assistant to Karl Krummenacher

Romé's diverse background has equipped her with strong organizational skills, adaptability, and the ability to manage complex operations with ease, making her a reliable and strategic partner in fast-paced environments.
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Sarah Prender

Operations Assistant

Sarah brings over 20 years of experience as an executive and personal assistant, where she mastered the art of organization, communication, and proactive problem-solving.
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Jolie Leslie

Customer Service Administrator

With a diverse background in Human Resources, Marketing, and Sales, Jolie brings a unique perspective to patient care -
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Meg Keegan

Customer Service Administrator

Based in Austin, Texas, Meg brings a wealth of experience in education, community engagement, and leadership to her role as the first point of contact for Modern Thyroid Clinic.
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Ngozi David

Administrative Virtual Assistant

Ngozi suports a wide range of behind-the-scenes operations that help the clinic run smoothly each day, centering on organization, coordination, and ensuring a seamless communication and support experience.
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Above all remember:
There’s no reason to still have thyroid symptoms.

-McCall McPherson PA-C

A holistic approach to women's health and hormones

Clinic
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Support
(512) 368-9171
(512) 852-6746 fax
info@modernthyroidclinic.com
Address
Inside of Alive and Well Annex
3944 Ranch Rd 620 S
Building 6, Suite 100
Bee Cave, TX 78738
Office hours
Mon–Thurs: 10am–4pmNotify Me When MTC Is In My Area
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13 Questions To Ask a Practice

  • Ask the Right Questions - Learn the 13 critical questions to ask before choosing a thyroid doctor.
  • Ensure Comprehensive Care - Discover what tests and treatments should be part of your thyroid evaluation.
  • Understand Medication Options - Learn about T3-based therapies, desiccated thyroid, and more.
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