
Medical laboratory testing is a critical component of diagnostic testing and plays a vital role in managing and maintaining your health. Through precise analysis of blood, urine, and other samples, laboratory tests help detect diseases early, monitor chronic conditions, and guide treatment decisions.
At Prima Medicine, led by Chethana Rao, MD, Washingtonian magazine’s 2018 Top Doc, we are proud to offer state-of-the-art medical laboratory testing to Fairfax, South Riding, and Merrifield, Virginia, residents. Our experienced team provides precise results with the care and professionalism you deserve.
It doesn’t matter if you need routine blood work, diagnostic screenings, or specialized testing. Prima Medicine’s internal medicine services make it easy to access tests for proactive healthcare.
About Medical Laboratory Testing
Medical laboratory testing involves analyzing samples of blood, urine, tissue, or other bodily fluids to evaluate your health status. These tests are essential tools in modern medicine that help your primary care physician make informed decisions about your care.
Lab tests serve multiple purposes in your healthcare journey. They establish baseline health markers during routine physical exams, detect diseases before symptoms appear, confirm or rule out suspected conditions, and monitor how well treatments are working. Your doctor may order lab work as part of preventive care, to investigate specific symptoms, or to track existing health conditions like diabetes or high cholesterol.
Most laboratory tests require a simple blood draw or sample collection, with results typically available within days. At Prima Medicine, we make the process convenient and comfortable, with minimal wait times and clear explanations of what your results mean for your health.
Why Medical Laboratory Testing Is Essential
Medical lab tests give you valuable insights into your general health. These tests help detect issues early and ensure your body is functioning as it should. They also allow you to track the effectiveness of ongoing treatments through chronic care management.
At Prima Medicine, our comprehensive tests include:
- Blood Tests: Complete blood counts (CBC), cholesterol screenings, and glucose monitoring.
- Metabolic Panels: Identify issues with kidney, liver, or electrolyte function.
- Thyroid and Hormone Testing: Detect imbalances that impact your energy, metabolism, and mood through hormone therapy evaluation.
- Infection Screening: Tests for viral or bacterial infections for faster treatment.
- Chronic Disease Testing: This includes testing for conditions like diabetes and anemia.
We utilize advanced laboratory technology for accurate and prompt results. Our team works with your healthcare provider to communicate findings and give you peace of mind.
Convenient Lab Testing in Fairfax, South Riding, and Merrifield, VA
At Prima Medicine, we understand that lab testing should be as convenient and stress-free as possible. With locations in Fairfax, South Riding, and Merrifield, our patients can access the tests they need without the hassle of long waits or distant travel. We provide:
- Flexible Appointments: We have convenient scheduling options to fit your busy lifestyle.
- A Comfortable Environment: Our clinics are clean, safe, and welcoming.
- Efficient Results: Quick turnaround times ensure you don’t have to wait long for answers about your health.
Lab Test Preparation
Preparation for a lab test depends on the type of test being performed. Here are some general guidelines to help you get ready:
- Fasting: You may need to fast for 8-12 hours before your appointment for tests like blood glucose, cholesterol, or metabolic panels. Unless instructed otherwise, only drink water during this time.
- Medications: Inform your doctor about any medications, vitamins, or supplements you take. You may need to avoid certain medications before testing.
- Stay Hydrated: Drink plenty of water before tests, especially blood draws. This makes veins easier to locate.
- Avoid Certain Foods and Drinks: Before some tests, avoid alcohol, caffeine, and high-fat meals. These may affect the results.
- Timing: Some tests, like hormone or cortisol tests, need to be performed at specific times of the day. Follow your doctor’s instructions.
- Urine or Stool Samples: For urine or stool tests, you may be given specific collection instructions, including how to store the sample.

Why Choose Prima Medicine?
At Prima Medicine, we are led by Chethana Rao, MD, and supported by a team of experienced medical doctors, physician assistants, nurse practitioners, and a registered dietitian. We offer various services to maintain all aspects of your health and wellness, from preventive care to weight loss programs.
Our patient-focused approach has earned us over 1,000 five-star ratings, reflecting our commitment to exceptional treatment and outstanding results. With advanced medical solutions, personalized attention, and a dedication to your health, Prima Medicine is the trusted choice for reliable, compassionate care.
Book Your Medical Laboratory Test Today
Take control of your health with reliable and convenient medical laboratory testing at Prima Medicine. Our team is here to support you with routine blood work, specialized diagnostic testing, and more.
Contact us today to schedule your lab appointment at one of our convenient locations in Fairfax, South Riding, or Merrifield, VA. Call us now at (703) 870-3750 or book your appointment online to get started.









































