Functional Medicine

Verified listing
952 Gruene Rd #130, New Braunfels, TX, 78130
5.0(25 Google reviews)
Read reviews on Google ↗as of Oct 2026
ABFM

About Functional Medicine

What is Functional Medicine?

Functional Medicine is a family medicine practice in New Braunfels, Texas, at 952 Gruene Rd #130. Its phone number is (830) 521-8128. The practice calls its work functional medicine and offers a 12 month program built around optimizing health, finding root causes, and bringing in holistic treatments.

Dr. Thomas Kay, MD, ABFM, is the only prescriber the practice names. He describes himself as a Board Certified Family Medicine physician with almost 30 years of practice. He worked in the ER for over 25 years and started his private practice in 2016. Google lists the practice as a medical office with a rating of 5 from 25 reviews.

The program covers optimizing sex hormones, peptide therapy, growth hormone, cortisol, thyroid, insulin, and melatonin. It also covers microbiome and infection work, food plan and nutrition assessment, and detox, including avoidance and elimination of heavy metals and mold. Hormone and peptide therapy are the services it names most clearly. It does not describe weight loss or longevity medicine.

What does it cost?

It does not publish prices. It gives no consultation fee, does not say whether medication is included, and does not say whether it accepts insurance. The only term it gives is the length of the program: "A 12 month program to optimize your health." Ask for the full price of that program, what the fee covers, and how it is billed. Ask whether financing or a payment plan is available.

What should you ask before you book?

Ask who writes each prescription and how often Dr. Kay sees you in person. Ask whether the program fee includes medication, and which medications are used for hormone and peptide therapy. For each one, ask whether it is a brand name product or compounded by a pharmacy, and which pharmacy fills it. Ask what lab work is needed to start and to continue, and what it and a follow-up visit cost.

Ask whether telehealth is offered, what the office hours are, and whether insurance is accepted. Because the name is generic, confirm the address and phone number before you book. Finally, ask how the program is cancelled and whether any part of the fee is refunded if you stop early.

Who is it a good fit for?

This is a good fit if you want a physician guiding a 12 month program that covers hormones and peptides, and you will get the price, the medication terms, and the cancellation rules in writing before you pay. If you are looking for weight loss or longevity medicine, ask about those directly, since the practice does not describe either.

Sources: nbfunctionalmedicine.com, nbfunctionalmedicine.com/program, nbfunctionalmedicine.com/contact, nbfunctionalmedicine.com/about-me

Services Offered

✓Optimizing sex hormones
✓peptide therapy
✓growth hormone
✓cortisol
✓thyroid
✓insulin
✓melatonin
✓Works to optimize, repair, and investigate microbiome dysfunction and infections.
✓Finding your best food plan, discovering harmful foods, as well as macro/micro nutritional assessment.
✓Exploring avoidance, elimination (heavy metals, mold, etc), and optimizing the body’s detox pathways.

What we confirmed

Read off Functional Medicine’s own website on 2026-10-11. These are their words, not ours.

  • ✓Hormone therapy — listed on their site as “Optimizing sex hormones, peptide therapy, growth hormone, cortisol, thyroid, insulin , melatonin, and others.” source
  • ✓Peptide therapy — listed on their site as “peptide therapy” source

Location