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.

04/21/2026

Thinking about shrinking your thyroid nodule without surgery? There's one crucial safety step we insist on first: TWO benign biopsies. 🛑🔬

If you are considering Radiofrequency Ablation (RFA) to treat a large, symptomatic thyroid nodule, we want to make sure your treatment is as safe as possible. In this clip, Dr. Jonathan Leffert explains the medical guidelines behind the "Two-Biopsy Rule."

Because RFA is primarily designed to treat benign (non-cancerous) nodules, we have to be absolutely certain we aren't accidentally treating a hidden malignancy. Here is why one biopsy just isn't enough:

The "False Negative" Risk: No medical test is 100% perfect. A single biopsy carries a small risk of coming back negative even if abnormal cells are present.

The Size Factor: Large nodules contain a lot of tissue. A single biopsy needle might simply miss a tiny, isolated pocket of cancerous cells.

By requiring two separate benign biopsies, we essentially eliminate these risks. It's an extra step of caution that allows us to move forward with your non-surgical RFA procedure with complete confidence.

📍 Expert Thyroid Care | Dallas, TX
🔗 Learn more about safe, non-surgical nodule treatments at ntendocenter.com/rfa.

04/20/2026

What do your thyroid biopsy results actually mean? 🔬

Dr. Jonathan Leffert explains that it all comes down to the pattern of your cells. By analyzing how these cells aggregate, pathologists can determine if a nodule is benign, suspicious, or malignant using the Bethesda categories.

And if the pattern isn't clear? That’s where molecular testing steps in to provide the specific information needed to nail down a definitive diagnosis. 🧬

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/17/2026

The needle is out... but the real work is just beginning! 🔬

Ever wonder what happens to your thyroid biopsy sample once it leaves the office? It’s not just about the procedure; it’s about the science. 🧪

Dr. Jonathan Leffert explains the journey from the biopsy container to the microscope. Whether it's a liquid sample or a slide, your cells are prepared for a cytopathologist—a specialist who looks at cell patterns to find the answers you need.

In our practice, we use a thyroid-only cytopathologist. Why? Because when it comes to your health, specialized expertise leads to more accurate results. 🩺

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/16/2026

A thyroid biopsy doesn’t have to be a big deal. 🙅‍♀️

Dr. Jonathan Leffert explains the simple, in-office process:
✅ Tiny 27-gauge needle (smaller than a blood draw!)
✅ Numbing spray for comfort
✅ Ultrasound-guided precision
✅ Zero downtime

Back to work, back to life—just with a tiny band-aid. 🩹

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/16/2026

Metformin: Still the Gold Standard in 2026 💊✨

Why is Metformin still the #1 first-line treatment for Type 2 diabetes after all these years? Because it works—consistently and effectively. As Dr. Leffert explains, this "utilitarian" powerhouse remains one of the most reliable tools we have for achieving true clinical control.

Why Metformin is a Top Choice for Results:

📈Real A1c Impact: It typically provides a 0.5% to 1% decrease in Hemoglobin A1c, which is often the exact boost needed in the early stages of treatment.

📈Attacking the Root Cause: It doesn't just mask high numbers; it directly targets insulin resistance, helping your body’s cells actually utilize the insulin you produce.

📈Heart Health Benefits: Beyond blood sugar, early clinical data suggests Metformin may offer protective benefits against coronary disease.

While we always monitor kidney function (GFR) as a standard clinical precaution to ensure total safety, it is important to remember that Metformin does not cause kidney disease. For the vast majority of patients, it is a safe, effective, and foundational part of a successful health journey.

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/14/2026

Managing Metformin Side Effects: The "ER" Advantage 💊🩺

Metformin is a powerhouse for managing Type 2 diabetes because it's effective, low-cost, and easy to take. However, for many patients, the initial "tummy troubles"—like nausea or diarrhea—can be a major hurdle. Dr. Leffert explains the clinical strategies used to help patients stay on track without the discomfort.

How to minimize GI distress:

👉The "Low and Slow" Approach: Clinical best practice is to start with a low dose and increase it incrementally as your body tolerates the medication.

👉Switch to Extended Release (ER): If standard Metformin is too harsh on your system, the ER version is often a game-changer. It is much gentler on the stomach and offers the convenience of once-daily dosing.

👉Be Patient: In most cases, these side effects are temporary and improve as your system adjusts to the treatment.

Don't let side effects stand in the way of your progress. Understanding your options for different formulations can make all the difference in your long-term success.

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/13/2026

Metformin: The #1 First-Line Choice for a Reason 💊✨

Why has Metformin remained a staple in diabetes care since the 1980s? As Dr. Leffert explains, it’s because it directly attacks the root cause of Type 2 Diabetes: Insulin Resistance. When your body struggles to use the insulin it produces, glucose stays in the bloodstream instead of fueling your cells. Metformin works at the cellular level to improve that sensitivity, helping your body function the way it should.

Beyond blood sugar, Metformin is a "utilitarian" powerhouse:

❤Heart Health: Early clinical studies suggest potential cardiovascular benefits when used early in treatment.

❤PCOS Management: It is a vital tool for those with Polycystic Ovarian Syndrome to manage insulin resistance.

❤Proven Reliability: With decades of data, it remains one of the most consistent and effective early treatments available.

Understanding how your medication works is the first step toward taking control of your metabolic health.

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

04/10/2026

Stop Guessing. Start Seeing with CGM. 📈🛡️

A Continuous Glucose Monitor (CGM) provides more than just data—it provides a real-time window into how your body functions. As Dr. Leffert explains, this technology is an essential resource for achieving true clinical control of diabetes.

Why a CGM is a game-changer:

📈Immediate Feedback: See exactly how your blood sugar reacts to specific meals—from high-carb dishes to protein and vegetables.

📈Insulin Precision: Better manage carbohydrate counting and sliding scales by seeing exactly how your insulin is working throughout the day.

📈Life-Saving Alarms: For those with hypoglycemia unawareness, a CGM provides critical alerts for low blood sugar, especially during the night when you may not feel the symptoms.

Whether you're managing Type 1 or Type 2 diabetes, a CGM takes the mystery out of your treatment plan and replaces it with actionable, clinical information.

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/09/2026

Is it time to trade your finger sticks for a CGM? 🩺📈

Continuous Glucose Monitors (CGMs) have moved into the mainstream for a reason. For years, we only had "point in time" data to manage diabetes, but now we have a real-time movie of your metabolic health.

How a CGM empowers your care:

📈Constant Monitoring: Your sensor records glucose every five minutes.

📈Direct to Phone: Access your data instantly via a mobile app.

📈Identify Patterns: Helps your physician identify trends and fine-tune your treatment using weeks of recorded data rather than a single "pop quiz."

Take the mystery out of your diabetes management and get the full picture of your health.

Partner with a team that puts your clinical health first. Contact our office today!

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

04/06/2026

GPA vs. Pop Quiz: Understanding Your Diabetes Numbers 🎓📝

Ever feel confused by the difference between your daily finger sticks and your 3-month A1c? Dr. Leffert uses a simple analogy to clear it up:

🍎Hemoglobin A1c = Your GPA. This is your grade point average over several months. It gives us the "big picture" of your progress and is the gold standard for predicting long-term health and preventing complications.

🍎Daily Blood Sugar = A Pop Quiz. This is a single score at one specific moment. It is important for day-to-day adjustments, but it can change rapidly based on what you ate, your stress levels, or even a quick workout.

Both numbers are vital tools in your diabetes toolkit, but they tell us different things. Whether we are looking at your long-term average or a moment-in-time "quiz," the goal is the same: providing the data needed to make the best decisions for your health.

Expert Care for Your Metabolic Health
If you need help navigating your diabetes numbers and finding a treatment plan that works for your life, we are here to help.

North Texas Endocrine Center
🌐 ntendocenter.com
📞 (214) 369-5992

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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