Dr. Jonathan Leffert

Dr. Jonathan Leffert Jonathan Leffert, MD is a board certified endocrinologist.

He offers thyroid RFA, a nonsurgical and thyroid sparing treatment option for patients with thyroid nodules.

03/17/2026

"Para" means around—but the parathyroid glands have their own very important job! 🦴✨

Primary hyperparathyroidism is a common condition where one or more of these tiny glands become enlarged, disrupting your body's calcium balance. While surgery has been the traditional gold standard, a major topic of debate at the recent NASIT meeting in Portland was the emerging use of Radiofrequency Ablation (RFA) for parathyroid glands.

Is RFA the right choice for hyperparathyroidism? It’s a complex question. Because these glands are small and sit tucked away near vital nerves and blood vessels, the procedure requires extreme precision and a highly experienced hand.

The medical field is constantly evolving, and these healthy debates among specialists are how we move from traditional methods to a new era of individualized, minimally invasive care.

Start your New Year with a team that puts your health first. Contact our office today!
North Texas Endocrine Center 🌐 ntendocenter.com
📞 (214) 369-5992

03/16/2026

Living with low calcium is more than just a lab result—it’s a daily struggle. 📉

Hypoparathyroidism, often caused by surgical disruption in the neck, leaves the body unable to regulate calcium on its own. While traditional treatments rely on high doses of Calcium and Vitamin D, this "calcium roller coaster" can often lead to complications like kidney stones.

But there is new hope. Yorvipath is a parathyroid hormone (PTH) agonist that is changing lives. This daily injection helps maintain stable calcium levels and may reduce or even eliminate the need for heavy oral supplementation for many patients.

If you’ve struggled to find a balance with your calcium levels, it might be time to discuss whether this new therapeutic option is right for you.

Work with a team that puts your health first. Contact our office today!
North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

03/13/2026

Did you know that 70% of patients get their medical information from the internet and the media? 📱

While accessibility is great, a point discussed at the recent NASIT meeting is that much of this information is written at a level that is far too complex. When medical resources are filled with jargon, it creates a barrier to understanding your own health and feeling confident in your treatment options.

My goal is to change that. Whether we are discussing thyroid nodules or the latest in RFA technology, I am committed to providing information that is:
✅ Scientifically based
✅ Free of medical jargon
✅ Clear and easy for everyone to understand

I want these videos to be a resource that empowers you to have better conversations with your physician.

Do you have a question about thyroid care that you’ve been trying to find a clear answer for? Please leave a comment below! I’ll be reading through them and getting back to you with the answers you need. 👇

03/12/2026

150+ physicians. 3 days in Portland. 25 years of proven data. 🏛️✈️

Dr. Leffert recently joined a diverse group of ENT doctors, surgeons, radiologists, and fellow endocrinologists at the NASIT (North American Society of Interventional Thyroidology) annual meeting to discuss the future of thyroid nodule care.

The standout moment? A talk by Dr. Jung Hwan Baek, a world authority who has spent the last quarter-century taking Radiofrequency Ablation from a novel idea to a globally recognized medical standard.

When you choose Thyroid RFA at North Texas Endocrine Center, you aren't just choosing a nonsurgical procedure—you’re choosing 25 years of scientific maturity and a commitment to staying at the forefront of medical history.

Start your New Year with a team that puts your health first. Contact our office today for a consultation!
North Texas Endocrine Center 🌐 ntendocenter.com | 📞 (214) 369-5992

03/11/2026

Global Insights for Better Patient Care 🌎🩺
​I am returning from in Portland feeling incredibly inspired.

​Spending time with colleagues from across the globe was a masterclass in collaboration. The "lessons learned" and shared experiences are invaluable—and I’m excited to bring these insights back to my practice to further enhance our Thyroid RFA outcomes.

​Always learning, always evolving, and always focused on providing the best possible care for my patients. 🦋

​

03/10/2026

Can you have PCOS without ovarian cysts? 🤯🩸

The name "Polycystic O***y Syndrome" is actually a bit misleading. In this clip, Dr. Jonathan Leffert explains that PCOS is fundamentally an insulin resistance and hormonal issue—meaning many women diagnosed with it don't actually have cysts on their ovaries at all!

Because it is a "syndrome," it shows up differently for everyone. You don't have to check every single box to be diagnosed. Symptoms can include:
🔹 Irregular menstrual cycles
🔹 Stubborn acne
🔹 Excess hair growth
🔹 Unexplained weight gain

Wondering what labs to ask for? If you suspect you have PCOS, an endocrinologist won't just look at a basic blood panel. A comprehensive workup should include:
🔬 Fasting Insulin & Fasting Glucose
🔬 Hemoglobin A1C
🔬 Testosterone
🔬 FSH and LH (Pituitary hormones)
🔬 DHEA Sulfate (Adrenal hormone)

Stop guessing and start testing. Getting to the bottom of your hormones is the first step toward getting your life back.

📍 North Texas Endocrine Center | Dallas, TX
🔗 Partner with an expert: ntendocenter.com

03/09/2026

"Just lose weight." If you have PCOS, you’ve probably heard this frustrating advice. 🛑

For years, the standard advice for Polycystic O***y Syndrome (PCOS) has focused entirely on the scale. But in this clip, Dr. Jonathan Leffert explains why that approach misses the mark.

To truly manage PCOS, you have to get to the root of the problem: Insulin Resistance.

What you need to know:

🍎The Root Cause: Insulin resistance is the dominant hormonal abnormality driving PCOS symptoms, not just your weight.

🍎The "Lean PCOS" Reality: You do not have to be overweight to have PCOS. Many thin individuals struggle with this condition because the underlying insulin resistance is still present.

🍎The Real Solution: True healing begins when we stop treating just the symptoms (or the scale) and start addressing the hormonal imbalances at their source.

Are you tired of being told to "just lose weight" without a real plan for your hormones? It’s time to get to the bottom of your PCOS.

📍 North Texas Endocrine Center | Dallas, TX
🔗 Partner with us for your hormonal health: ntendocenter.com

03/06/2026

🚨 Dr. Leffert officially on YouTube! 🚨

Searching for answers about thyroid nodules, diabetes, or hormone problems can feel like an overwhelming maze of medical jargon. But what if your doctor’s goal was to meet you exactly where you are and simplify the science? 🧬

Meet Dr. Jonathan Leffert, a board-certified endocrinologist here in Dallas with over 30 years of experience. We've launched a brand new YouTube channel to bridge the gap between high-tech medical advancements and patient-centered care.

Here is what you can expect when you subscribe:

🦋 The Future of Thyroid Care: Deep dives into non-surgical treatments like Radiofrequency Ablation (RFA). Learn how we can shrink nodules by 50% to 75% right in the office—without the surgical scars or lifelong medication!

🍎 Diabetes Management: How to harness the latest technology to master self-management and avoid complications.

🦴 Osteoporosis Care: Clear guidance on navigating complex bone health medications to prevent fractures and improve your quality of life.

Dr. Leffert’s philosophy is simple: you aren't just a patient—you’re a partner in your own health success. 🤝

Ready to learn? SUBSCRIBE so you never miss a video! .JonathanLeffert on YouTube!🎥👇

📍 North Texas Endocrine Center | Dallas, TX
🔗 ntendocenter.com/rfa

03/06/2026

3 Indicators You Don’t Need Thyroid Surgery 🦋🩺

Finding a thyroid nodule can be overwhelming, but surgery isn't always the answer. In fact, many patients can safely avoid the operating room. Dr. Jonathan Leffert breaks down the three key indicators that your nodule can be managed without a scalpel.

The "No-Surgery" Checklist:
1️⃣ It’s Benign: If testing confirms the nodule is non-cancerous, surgery is often unnecessary.
2️⃣ Normal Thyroid Function: If your labs are stable and the nodule isn’t "toxic" (overproducing hormones), your thyroid is still doing its job.
3️⃣ You Are Symptom-Free: If you aren't experiencing difficulty swallowing, breathing issues, or visible cosmetic concerns, "watching and waiting" is often the best medicine.

At the North Texas Endocrine Center, we believe in preserving your thyroid whenever possible. If you do have symptoms but want to avoid surgery, ask us about Radiofrequency Ablation (RFA)—a non-surgical way to shrink nodules in-office.

📍 Expert Thyroid Care | Dallas, TX
🔗 Check your symptoms: ntendocenter.com/rfa

03/04/2026

Thyroid RFA vs. Surgery: Which is right for your benign nodule? 🦋⚖️

If your thyroid nodule is causing pressure, difficulty swallowing, or is visible in your neck, you finally have choices. In this clip, Dr. Jonathan Leffert compares the traditional surgical approach with the modern, non-surgical alternative: Radiofrequency Ablation (RFA).

The RFA Advantage (Non-Surgical):
✅ In-Office: Done in 20–30 minutes with light relaxation (no general anesthesia).
✅ Fast Recovery: Go home the same day with a simple Band-Aid—no surgical scars.
✅ Preserve Function: RFA shrinks the nodule by 50% or more while keeping your thyroid intact.

The Surgical Reality:
⚠️ More Invasive: Requires a hospital stay or surgical center and general anesthesia.
⚠️ Hypothyroidism Risk: Removing even half the thyroid (a lobe) carries a 25–30% risk of needing lifelong thyroid hormone. A total thyroidectomy means 100% dependency on medication.
⚠️ Permanent Scar: Surgery leaves a visible mark on the neck.

The right choice depends on your nodule’s size, location, and your personal health goals. Why opt for a major operation if a 30-minute office procedure can give you the relief you need?

📍 Located in Dallas, TX
🔗 See if RFA is right for you: ntendocenter.com/rfa

03/04/2026

"Do I REALLY need a thyroid biopsy?" 🧐💉

If you’ve discovered a thyroid nodule, your next fear is often the biopsy. But here’s the good news: Not every nodule requires one.

In this video, Dr. Jonathan Leffert discusses how the "decision-making matrix" has evolved. Thanks to advanced ultrasound technology and molecular markers, we can often avoid unnecessary procedures while getting much more accurate answers for the ones we do perform.

What happens if your result is "Indeterminate"?
In the past, a "gray area" result often meant surgery "just in case." Today, we use molecular markers to define exactly whether a nodule is benign or malignant, saving many patients from unnecessary operations.

Even if it’s Benign, you have options:
If your nodule is non-cancerous but is causing:
✅ Difficulty swallowing or breathing
✅ A "full" or compressed feeling in the neck
✅ Cosmetic concerns (a visible lump)
..you don't have to just "live with it" or opt for major surgery.

📍 North Texas Endocrine Center | Dallas, TX
🔗 Explore non-surgical RFA treatment: ntendocenter.com/rfa

03/03/2026

Found a lump on your thyroid? Take a deep breath. 98% of nodules are benign. 🕊️🩺

The moment you feel a lump in your neck, your mind often jumps to the worst-case scenario. But in endocrinology, the reality is much more reassuring. In this clip, Dr. Jonathan Leffert breaks down the "decision-making matrix" for evaluating thyroid nodules and why 98% of them are non-cancerous.

The Path to Peace of Mind:

👉 Physical Exam: Dr. Leffert evaluates the feel and location of the nodule.

👉 Thyroid Labs: We check your blood work to ensure your thyroid function is normal.

👉Ultrasound Imaging: This is the most critical step. A specialized ultrasound identifies specific characteristics—like size, shape, and composition—that tell us if a nodule is likely benign or needs further testing.

Knowledge is the best cure for anxiety. If you’ve found a lump, don't stay in the dark. A simple evaluation can provide the answers you need.

📍 Advanced Thyroid Care | Dallas, TX
🔗 Start your evaluation here: ntendocenter.com/rfa

Address

NORTH TEXAS ENDOCRINE CENTER: Carrell Clinic Center, Tower II, 9301 North Central Expressway, Suite 570
Dallas, TX
75231

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm

Telephone

+12143695992

Website

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