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  1. How Is Hypertension Diagnosed: What Doctors Look For

    Diagnosing hypertension involves more than a single reading. Learn how doctors confirm high blood pressure and what tests typically follow.

    By Heidi Gross
  2. How Is Hyperthyroidism Diagnosed? Blood Tests to Scans

    From a simple TSH blood test to radioactive iodine scans, here’s how doctors diagnose hyperthyroidism and identify what’s causing it.

    By Margaret Barber
  3. How to Diagnose Gallstones: Ultrasound, Blood Tests & More

    From ultrasound to MRCP, learn how doctors diagnose gallstones and why the right test depends on your symptoms.

    By Mariana Vargas
  4. What Does Radiology Do? From Scans to Cancer Care

    Radiology does more than take images. Learn how it helps diagnose disease, guide treatment, and support cancer care.

    By Laura Evans
  5. How Is Prostatitis Diagnosed? What Doctors Look For

    Prostatitis diagnosis involves urine tests, a physical exam, and sometimes imaging. Here’s what doctors are actually looking for and why.

    By Issa Jaber
  6. What Are Cancer Markers and How Do They Work?

    Cancer markers are substances in your blood or tissue that can signal cancer activity. Learn what they measure, how doctors use them, and why they’re not always definitive.

    By Donna Tarasenko
  7. How Is Gastroparesis Diagnosed? Tests and Next Steps

    If your doctor suspects gastroparesis, here’s what the diagnostic process typically looks like, from ruling out blockages to gastric emptying studies.

    By Margaret Salazar
  8. What Is Direct Bilirubin? Levels, Causes & Tests

    Direct bilirubin is a liver marker that can reveal bile flow problems or liver disease. Learn what your levels mean and when to talk to a doctor.

    By Georgina Rice
  9. What Is a Gram Stain? Purpose, Procedure & Results

    A gram stain helps doctors identify bacteria quickly by color, guiding faster treatment decisions before full lab results are available.

    By Candace Graves
  10. How Is Chlamydia Tested: Swabs, Timing, and Results

    Learn what chlamydia testing actually involves, when to get tested after exposure, and what to do if your result comes back positive.

    By John Hagopian
  11. How Is Testosterone Tested? Blood Tests Explained

    Learn how testosterone blood tests work, what total vs. free testosterone means, and why your doctor may order more than one test before making a diagnosis.

    By Holly Aziz
  12. How Is Sarcoidosis Diagnosed: X-Ray, Biopsy, and More

    Sarcoidosis diagnosis often involves chest X-rays, biopsies, and several other tests. Here’s what doctors look for and why it can take time to confirm.

    By Pamela R. Cho
  13. How Is Prediabetes Diagnosed: 3 Blood Tests Explained

    Learn how the A1C, fasting glucose, and oral glucose tolerance tests detect prediabetes, and what your results actually mean for your health.

    By Amy Pierce
  14. What Is ADOS Testing? The Autism Diagnostic Tool Explained

    ADOS testing uses structured activities to help clinicians assess autism. Learn how it works, what the scores mean, and its role in diagnosis.

    By Wendy Colombo