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Clinical Diagnostic Laboratories is an affordable and efficient medical laboratory located in Northern Virginia in Sterling, VA and in Ashburn, VA just minutes from One Loudoun. At our facility, we strive to provide the highest possible quality testing for doctors, companies and organizations, and for individual patients. The DMV's Most Trusted Lab for Fast, Accurate, and Reliable Testing–Every Time From routine panels to advanced diagnostics, we deliver results you can trust with speed you can count on. About Us Schedule An Appointment Pre-Built Panels Ashburn 44355 Premier Plaza Suite 230, Ashburn, VA 20165 Sterling 2 Pidgeon Hill Dr. Suite 150, Sterling, VA 20165 Fairfax 8318 Arlington Blvd Suite 103, Fairfax, VA 22031 Schedule An Appointment OUR CURRENT HOURS ARE: Monday 9am - 3pm Tuesday 9am - 3pm Wednesday 9am - 3pm Thursday 9am - 3pm Friday 9am - 3pm Saturday 9am - 3pm* Sunday: Closed* *Appointments are highly recommended on Monday-Saturdays and major Holidays are by appointment only Please contact us ahead of time to verify if walk-ins are available. Schedule An Appointment ABOUT CLINICAL DIAGNOSTIC LABORATORIES Preferred Diagnostic Center in Loudoun County Our main goal is to provide an alternative testing facility for individuals: doctors, as well as hospitals that is affordable and convenient. What makes Clinical Diagnostics Laboratories different from the others? We provide excellent service with a personal and friendly touch. We have an on-call Director at the Lab who has a Ph.D. in Pathology. Our Full-time Technologist has over ten years of experience in the Medical Lab field. Clinical Diagnostic Laboratories has grown quickly throughout the area with respect to returning individuals, referrals and walk-ins because we treat our patients with dignity and respect. About Us “Clinical Diagnostic Laboratories is recognized as the TOP Diagnostic Lab for the Northern Virginia, Washington, DC and Maryland regions and is featured on the TOP Doctors Interviews which are seen on CNN Headline News, MSNBC, Oprah Winfrey Network, BRAVO and other networks” Services We Provide Our laboratory provides services for a variety of organizations and companies across a wide array of industries. Whether you're a private organization, government contractor, medical facility, small to large company, or something else entirely, we have the resources to help you achieve your desired goals. Please inquire for more information. View All Services No Insurance Required - Try Our Pre-Built Panels Our pre-built lab panels offer a fast, affordable way to check in on your health—no insurance or doctor’s order required. Whether you're monitoring your wellness, checking vitamin levels, or screening for common conditions, we've bundled the most important tests into convenient packages. Simple pricing, quick results, and expert local service make it easy to take control of your health on your terms. Order a Health Panel Let Us Come to You Our on-site services extend to Northern Virginia, Maryland, and Washington DC We care about our patients and understand that being home-bound or taking time out of your busy schedule can make diagnostic testing inconvenient, that is why Clinical Diagnostics Laboratories will come to you. Schedule An Appointment

The product page for the HPV cervical cancer test at Clinical Diagnostic Laboratories. HPV Self- Collection Test This test screens for high-risk strains of Human Papillomavirus (HPV), the leading cause of cervical cancer in women. At Clinical Diagnostic Laboratories, this screening is performed using a single, simple cervical swab collected by a licensed medical professional at our facility — no mailing kits, no confusion. Early detection of HPV is one of the most effective ways to prevent the progression of cervical disease, especially for women 25 and older. This test is ideal for those who want to take control of their reproductive health without waiting for a doctor’s referral or dealing with insurance hurdles. With secure results delivered in just a few days, you get clarity, confidence, and peace of mind — all on your terms. Detects high-risk HPV strains associated with cervical cancer No referral, copay, or insurance needed Discreet and professional in-lab collection Results delivered securely in 2–5 business days A smart step toward prevention and early care $75.00 Taxes will be calculated at checkout Buy Now

Learn why our practice no longer accepts PPO insurance or Anthem HealthKeepers, what this change means for your care, and how we continue to prioritize accessible, patient‑focused treatment. Dear Valued Patient, We understand that navigating lab testing and insurance coverage can be confusing, stressful, and sometimes frustrating. Many patients expect that medically necessary lab tests will be fully covered by their insurance, only to be surprised by bills or claim denials. We want to take a moment to explain why this happens, and what options are available to you. Why Insurance Coverage Can Be Complicated Insurance companies often control which laboratories they will reimburse, and many have exclusive agreements with specific “preferred” labs. Even if your doctor orders a test that is medically necessary and has a preferred laboratory they wish to send it to, insurance may refuse to pay if the lab performing it is not on the insurer’s approved list. In addition: Claims can be denied for administrative reasons, not because the test lacks medical necessity. In 2023, studies showed that nearly 1 in 5 claims across commercial plans were denied, with out-of-network labs denied more than one-third of the time. Negotiated rates may not reflect the true cost of testing, leaving smaller or independent labs out-of-network and limiting patient choice. Large insurers sometimes rely on high-volume national labs (like LabCorp or Quest), which must process thousands of samples and often face delays, lost specimens, or reporting outside the necessary timeframe . “Insurance networks and claim rules can make testing feel more like a barrier than a service. That’s why we focus on transparency and patient choice.” Your Options: Affordable, Transparent Self-Pay To make testing accessible and predictable, we offer affordable self-pay pricing. Because all of our testing is performed in-house, locally, we can provide: Lower prices than national lab chains Faster turnaround times Greater accuracy and reliability If you choose to pay out-of-pocket, we will provide a superbill containing everything your insurance company needs to process a claim. This includes: CPT codes for all tests performed Diagnosis codes Our provider identifiers (NPIs) Itemized charges and documentation We are happy to assist you with any additional paperwork or information your insurer may request. Even if the claim is initially denied, we can provide supporting documentation to help you appeal. “We want you to have control over your care — and the ability to submit claims to your insurance if you wish.” Why Our Lab is Different Unlike large national laboratories: Everything is processed locally, in-house, giving us control over quality and timing We avoid unnecessary shipping, which reduces risk of lost or misreported samples Our focus is on patient-centered service, not volume This means you get your results faster, accurately, and at a fraction of the cost. We Are Here to Help We understand this situation is not your fault, and it’s not your choice. Insurance networks, coverage rules, and reimbursement policies are complex — even for providers. Our commitment is simple: Provide high-quality testing you can trust Offer transparent, affordable pricing Support you in navigating insurance reimbursement whenever possible “With self-pay options and superbill support, you can access the testing you need without unnecessary delays or surprises.” Take Action Today We make it simple to access testing services on your terms: If you have questions or need guidance about insurance or billing, please contact our team — we are happy to walk you through every step. With care, The Team at Clinical Diagnostic Laboratories The Team at Clinical Diagnostic Laboratories View Our Self Pay Options >

Purchase a laboratory panel that will make staying healthy, easy. No insurance required. No doctor order needed. And the results are provided quickly. Explore Our Tests HPV Self-Collection Test $75.00 Screens for high-risk HPV types linked to cervical cancer* Helps detect infection before symptoms appear* Designed for women 25+, prioritizing routine cervical health No referral or insurance required — discreet and direct access Results delivered securely within 2–5 business days A proactive step in protecting long-term reproductive health* Buy Now *This panel is not intended to diagnose, treat, cure, or prevent any disease. Always consult a healthcare provider for clinical follow-up. Women's Health Panel This panel supports hormone, thyroid, and nutrient balance—ideal for women experiencing fatigue, mood changes, or irregular cycles. It’s a simple, proactive way to monitor your health and feel your best, with easy-to-read results delivered securely in just a few days. $263.50 Buy Now Diabetes and Heart Health Panel This panel checks your long-term blood sugar levels and key cholesterol markers to help assess your risk for diabetes and heart disease. $139.00 Buy Now Complete Food Allergy Scan This test screens for common food and environmental allergens to help identify potential triggers behind skin, breathing, or digestive issues. With just a simple blood draw, you’ll gain clear insights to better manage allergies and improve your daily comfort. $155.00 Buy Now Complete STD Panel This panel tests for common STIs like chlamydia, gonorrhea, syphilis, and HIV using a quick blood sample collected at our lab—no swabs or mail-in kits required. It’s a confidential, hassle-free way to check your status for routine screenings, new relationships, or peace of mind. $285.00 Buy Now Women's Fertility Panel Our Women’s Fertility Panel offers a comprehensive look at the hormones and markers that influence reproductive health and ovulation. It’s ideal for those planning for pregnancy or wanting clarity about their cycle—no doctor’s order or insurance needed. To learn more, contact us using the button below. Contact Us Complete Respiratory Allergy Scan This test screens for common environmental allergens like pollen, pet dander, mold, and dust mites that may cause sneezing, congestion, or asthma-like symptoms. It’s performed with a simple blood draw and helps you identify triggers so you can breathe easier year-round. $288.00 Buy Now Men's General Health Panel This panel evaluates testosterone, cholesterol, blood sugar, and key nutrients like Vitamin D and B12 to give a clear picture of men’s energy, mood, heart health, and overall wellness. It's an easy, comprehensive way to stay on top of your health and performance. $241.00 Buy Now Cholesterol Test This comprehensive cholesterol test measures key heart health markers including HDL, LDL, triglycerides, total cholesterol, and Lipoprotein(a). It helps assess your risk for heart disease and provides a clear snapshot of your overall cardiovascular health. $95.00 Buy Now Men's Fertility Panel This panel includes a semen analysis to evaluate sperm count, movement, and overall quality—key factors that impact male fertility. It’s a simple, private test performed at our lab to help you take the first step in understanding your fertility status $85.00 Buy Now One-Day Fecal Immunochemical Test The InSure® ONE Fecal Immunochemical Test (FIT) is a simple, at-home screening that checks for hidden blood in your stool — an early warning sign of colon cancer or polyps. This one-day test makes it easy to stay proactive about your colorectal health. The kit can be mailed to you and a prepaid return envelope will be included. $35.50 Buy Now Frequently asked questions Online Tests - FAQs Do I need to schedule an appointment if I purchase the test online? Yes — once you place your order, you'll be prompted to schedule an appointment at one of our laboratory locations. Walk-ins are not permitted for prepaid panels to ensure proper time is set aside for your visit. Will I receive a kit in the mail? No — there is no kit mailed to your home. All testing is performed in our certified laboratory. After purchasing your panel, you'll simply come in for your scheduled blood draw. Do I need to bring anything to my appointment? Just bring a valid photo ID and your email confirmation. There’s no insurance information needed — we’ve already got you in the system. Do I need a doctor’s referral to order a test? Not at all. Our panels are available without a referral, prescription, or insurance. That’s part of what makes this process simple and accessible. How will I receive my results? Results are delivered securely via email in PDF format within 2–5 business days. You’ll be notified as soon as they’re ready. Can I use my HSA or FSA card? Yes — many patients successfully use HSA/FSA cards at checkout. Be sure to check with your plan provider for eligibility. Can I get reimbursed by my insurance? Yes — depending on your insurance policy, you may be eligible for reimbursement by submitting your receipt directly to your provider. However, reimbursement is not guaranteed. Some insurance plans do not cover specific tests or may require additional documentation before testing. We strongly recommend contacting your insurance provider in advance to understand your options, if you wish to be reimbursed. Is there a cancellation fee? Yes — if you cancel your order after purchasing online, a small cancellation fee of 3.4% will be applied to cover non-refundable transaction processing costs.

The product page for the general Women's Health Panel Clinical Diagnostic Laboratories. Women's Health Panel Feel your best, inside and out. This comprehensive blood panel is designed specifically for women to provide a clear picture of your overall health, hormone balance, and essential nutrients. Whether you’re managing symptoms, staying proactive, or just checking in — this panel helps you take control of your wellness. Here’s what it checks — and why it matters: Complete Blood Count (CBC) – Measures your white and red blood cells to check for signs of fatigue, infection, or anemia. Comprehensive Metabolic Panel (CMP) – Evaluates your liver and kidney function, blood sugar, and electrolyte balance. Lipid Panel – Assesses cholesterol levels, including “good” (HDL) and “bad” (LDL) cholesterol, to help understand your heart health. TSH (Thyroid-Stimulating Hormone) – Screens for thyroid issues that can affect weight, mood, and energy. T4, Total & T3, Free – Additional thyroid hormones that give a fuller view of thyroid function and metabolic health. Estradiol, LH, FSH – These hormones play a major role in reproductive health, menstrual cycles, fertility, and symptoms like hot flashes or irregular periods. Vitamin D – Checks for deficiency in this key vitamin that supports your bones, immune health, and mood. Ferritin – Measures iron storage in the body, which can help explain fatigue, hair thinning, or low energy. One blood draw — no referrals, no insurance required. Just clear answers, fast results, and the confidence to take control of your health. $263.50 Taxes will be calculated at checkout Buy Now

Ordering information regarding a Thyroid Stimulating Hormone test for Clinical Diagnostic Laboratories. Thyroid Stimulating Hormone (TSH) Ordering Recommendation Preferred test for initial screening and monitoring of thyroid function. Methodology Quantitative Electrochemiluminescent Immunoassay (ECLIA) Performed Mon-Sat Reported Within 24 hours New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Plasma separator tube, or serum separator tube SST Specimen Preparation: Separate serum or plasma from cells ASAP or within 2 hours of collection. Allow serum specimen to clot completely at room temperature. Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Grossly hemolyzed specimens. Remarks: Stability: After separation from cells: Ambient: Calcium and CO2: 4 hours, All others: 24 hours; Refrigerated: 1 week; Frozen: 2 weeks Reference Interval Components Available Separately Reference Interval Interpretive Data Note CPT Code 84443 Components Component Test Code Component Chart Name LOINC 0070145 Thyroid Stimulating Hormone 3016-3 Aliases Thyrotropin TSH TSH, Pregnancy

The product page for the Respiratory Panel for Clinical Diagnostic Laboratories. Complete Respiratory Allergy Scan Breathe easier with answers. This panel is designed to identify airborne allergens that may be behind your sneezing, congestion, itchy eyes, or asthma-like symptoms. Whether it’s seasonal discomfort or year-round sensitivity, this test helps pinpoint the specific environmental triggers affecting your respiratory health. Here’s what it checks — and why it matters: IgE Total, Serum – Measures your body’s overall allergic sensitivity, giving a baseline for reactivity. Environmental & Airborne Allergens – Tests for 23 common respiratory irritants, including: Molds: Alternaria Alternata, Aspergillus Fumigatus, Cladosporium Herbarum, Penicillium Chrysogenum Grasses & Weeds: Bermuda Grass, Johnson Grass, Timothy Grass, Rough Pigweed, Common Ragweed Trees & Pollens: Mountain Cedar, Birch, Cottonwood, Elm, Maple (Box Elder), Oak White, Pecan Hickory, Sheep Sorrel Animals: Cat Dander, Dog Dander, German Cockroach, Mouse Urine Other: Dernariohagoides (Dust Mite), White Mulberry From mold spores to pet dander and pollen, this test helps you understand exactly what’s causing your symptoms — so you can take smart steps to avoid triggers, improve your indoor air quality, and feel more comfortable year-round. Fast results, no referral needed, and no guesswork. $288.00 Taxes will be calculated at checkout Buy Now

Ordering information regarding a T- Uptake test for Clinical Diagnostic Laboratories. Thyroxine, Free (Free T4) Ordering Recommendation The preferred alternative to this test is Thyroxine, Free (Free T4) Methodology Quantitative Electrochemiluminescent Immunoassay (ECLIA) Performed Mon-Sat Reported Within 24 hours New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Serum separator tube or plasma separator tube. Also acceptable: Green (lithium heparin), lavender Specimen Preparation: Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Grossly hemolyzed specimens. Remarks: Stability: After separation of cells: Ambient: 8 days; Refrigerated: 2 weeks; Frozen: 2 years Reference Interval Free Thyroxine, ng/dL 0-3 days 0.7-2.7 ng/dL 4-30 days 0.8-3.1 ng/dL 1-23 months 2-6 years 0.5-2.3 ng/dL 0.9-1.8 ng/dL 7-11 years 0.9-1.7 ng/dL 12-19 years 12-19 years 0.9-1.6 ng/dL 0.9-1.6 ng/dL 20 years and older 0.9-1.7 ng/dL Pregnancy, 1st Trimester 0.9-1.4 ng/dL Pregnancy, 2nd Trimester 0.7-1.3 ng/dL Interpretive Data Thyroxine, Free (Free T4) is the preferred test alternative for T Uptake and Free Thyroxine Index tests. Note CPT Code 84439 Components Component Test Code Component Chart Name LOINC 0070138 Thyroxine Free 3024-7 Aliases Free Thyroxine FT4, Serum Non-Protein Bound Tetraiodothyronine T4 Free, Serum T4, Free Thyroid Function Cascade

Ordering information regarding a Tissue Transglutaminase (tTG) IgA test for Clinical Diagnostic Laboratories. Tissue Transglutaminase (tTG) IgA Ordering Recommendation Recommended single screening test for IgA-competent individuals with suspected celiac disease. (IgA testing recommended to identify IgA competence.). May aid in monitoring adherence to gluten-free diet in celiac disease-confirmed patients. Mnemonic Methodology Semi-Quantitative Enzyme-Linked Immunosorbent Assay Performed Mon-Sat Reported Within 24 Hours New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Serum separator tube (SST). Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Transfer 0.5 mL serum to a Standard Transport Tube. (Min: 0.3 mL) Storage/Transport Temperature: Frozen. Unacceptable Conditions: Refrigerated. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid freeze/thaw cycles) Reference Interval 3 U/mL or less 4-10 U/mL Negative Weak Positive 11 U/mL or greater Positive Interpretive Data Presence of the tissue transglutaminase (tTG) IgA antibody is associated with glutensensitive enteropathies such as celiac disease and dermatitis herpetiformis. tTG IgA antibody concentrations greater than 40 U/mL usually correlate with results of duodenal biopsies consistent with a diagnosis of celiac disease. For antibody concentrations greater or equal to 4 U/mL but less than or equal to 40 U/mL, additional testing for endomysial (EMA) IgA concentrations may improve the positive predictive value for disease. Note Testing for tTG IgA antibodies is recommended as an initial screen to identify patients at risk for celiac disease, and in whom duodenal biopsy should be performed to confirm disease. Some patients may have positive tTG IgA but negative EMA IgA and/or deamidated gliadin peptide (DGP) IgA results, which may be associated with false positivity or may indicate early disease. Close clinical correlation with continued testing may be indicated in patients with a family history of or who are at increased risk for celiac disease. A positive serology but normal biopsy may also indicate a gluten-free diet (GFD) prior to testing, latent disease, or early enteropathy. Re-challenge with a gluten diet may be recommended if GFD had been initiated prior to subsequent testing. In the case of latent or early disease, HLA DQ2 and DQ8 testing may be necessary to determine risk for disease. For patients with a high degree of suspicion for celiac disease and who test negative for tTG, EMA and/or DGP IgA tests, selective IgA deficiency should be considered and testing for tTG, EMA and/or DGP IgG antibodies performed. If serology is negative and suspicion for celiac disease is strong, intestinal biopsy may be warranted. Biopsy is particularly important for patients with diarrhea, steatorrhea, weight loss, failure to thrive, or with inherited genetic deficiencies such Down or Turner syndrome. CPT Code 86364 Components Component Chart Name Tissue Transglutaminase (tTG) Ab, IgA Component Test Code 0097709 LOINC 46128-5 Aliases Human RBC tTG Native tTG TG2 IgA Tissue Transglutaminase Tissue Transglutaminase Ab IgA tTG IgA tTG, IGA

Ordering information regarding a Deamidated Gliadin Peptide (DGP) Antibody, IgG test for Clinical Diagnostic Laboratories. Deamidated Gliadin Peptide (DGP) Antibody, IgG Ordering Recommendation Acceptable single screening test for celiac disease. IgA testing recommended to identify IgA deficiency. Use IgG test in individuals who are IgA deficient. May be useful in diagnosing children <2 years who test negative for tTG and EMA antibodies. May aid in monitoring adherence to gluten-free diet. Celiac Disease Reflexive Cascade (2008114 ) or Tissue Transglutaminase (tTG) Antibody, IgG (0056009 ) is the preferred test for screening patients with suspected celiac disease. Mnemonic Methodology Semi-Quantitative Enzyme-Linked Immunosorbent Assay Performed Mon-Sat Reported 1-2 Days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Serum separator tube (SST). Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Transport 0.5 mL serum. (Min: 0.3 mL) Storage/Transport Temperature: Refrigerated Unacceptable Conditions: Plasma or other body fluids. Contaminated, hemolyzed, grossly icteric, or grossly lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year Reference Interval 19 Units or less 20-30 Units Negative Weak Positive 31 Units or greater Positive Interpretive Data Note CPT Code 86258 Components Component Chart Name Deamidated Gliadin Peptide (DGP) Ab, IgG Component Test Code 0051359 LOINC 63459-2 Aliases Celiac Disease Antibodies Deamidated Gliadin Antibodies (DGP) Deaminated Gliadin Peptide Antibodies DGP DGP Ab DGP IgA