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Allergen, Food, Egg Whole Ordering Recommendation Not recommended for initial thyroid disorders testing. Distinguish thyroid autoimmune disorders from nonautoimmune disease or hypothyroidism. Mnemonic EGGWHOLE Methodology Quantitative ImmunoCAP Fluorescent Enzyme Immunoassay Performed Mon-Sat Reported 1-3 days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Multiple patient encounters should be avoided. Collect: Serum separator tube. Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Grossly hemolyzed or lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year Reference Interval Probability of IgE Mediated Clinical Reaction Reporting Range (reported in kU/L) Class Scoring No significant level detected Less than 0.10 0 0.10 - 0.34 0.35 - 0.70 Clinical relevance undetermined Low 0/1 1 0.71 - 3.50 3.51 - 17.50 Moderate High 2 3 17.51 - 50.00 50.01 - 100.00 Very high Very high 4 5 Greater than 100.00 Very high 6 Interpretive Data Allergen results of 0.10-0.34 kU/L are intended for specialist use as the clinical relevance is undetermined. Even though increasing ranges are reflective of increasing concentrations of allergen-specific IgE, these concentrations may not correlate with the degree of clinical response or skin testing results when challenged with a specific allergen. The correlation of allergy laboratory results with clinical history and in vivo reactivity to specific allergens is essential. A negative test may not rule out clinical allergy or even anaphylaxis. Compliance Category: FDA Note Components CPT Code 86003 Component Chart Name Allergen, Food, Egg Whole IgE Component Test Code 0055381 LOINC 7291-8 Aliases ImmunoCAP f245

Are you Available for Walk-Ins or Do I Need to Schedule an Appointment? You are not required to schedule an appointment at our facility. We are available for walk-ins during the weekdays during our standard operating hours. However, we do recommend patients schedule appointments ahead of time, contact us via our email form, or call in advance to verify the availability of a Phlebotomist (if bloodwork is required). How Long Does it Take to Receive my Lab Results? The turnaround time of a test varies depending on the test(s) being administered. Typically, a test will take around 2-5 days. We recommend contacting us ahead of time for more details based on the specific test being administered. I received my results but I'm having trouble opening them Results sent directly to your email will typically be password protected for your security. Passwords will be the Date of Birth of the patient in the following order: (Year/Month/Day). For example, if you're Date of Birth is January 31, 1980 your password will be the following: [1980/01/31] How Will My Results be Delivered? If you provided a doctor's order/referral your results will be sent over directly to your referring physician. You can contact your physician directly for the results of your test (if they did not already contact you). If an order was not provided, you will receive your results via email. Your results will be delivered as a password protected PDF file. How Long Does it Take to Receive COVID test results? The standard turnaround time for PCR-COVID test results is 24 hours. What types of tests do you offer? We offer a wide variety of medical tests including, but not limited to, H.Pylori, Drug screenings, STD testing, COVID, FLU, standard blood panels, and far more. Please contact us for more information. Are Children Permitted to Take a COVID test? Yes, children can take the PCR-Covid test. The cost of the test is the same for children. Are there other options besides a Nasal Swab for the PCR-COVID test? The most effective method of testing for the COVID-19 Coronavirus is via a Nasopharyngeal swab. A cheek or throat swab can also be performed at the request of a physician; however, either of these methods can be inaccurate and may result in an inconclusive lab result. What is the Difference Between a Rapid Test and a PCR test? The Rapid test (also known as the Antigen test) offers a fast turnaround time but is best used on patients showing symptoms. However, the rapid test results tend to be inaccurate when compared to the RT-PCR test. One can expect the results of a Rapid Test within 15 minutes. The RT-PCR (Polymerase Chain Reaction) test is considered the “Golden Standard” with regards to COVID tests. The PCR test is considered the more accurate version when testing for the COVID-19 virus. Do I Need to Pick Up my Results in Person? While you may pick up results in person, the delivered lab results will be sent to your physician directly either through their portal or via fax. If an order was not provided, results will be sent to the email address provided when you schedule an appointment. How do I Access my lab Results? If you came with a doctor’s order, Clinical Diagnostic Laboratories (CDL) will fax your lab results to your doctor’s office. We will also try to email results in a timely manner. However, if you do not receive your results after the given time frame, please follow up with CDL by emailing us at info@clinicaldiagnosticlab.com or call us at 703-430-1111. The email will be from labreport@clinicaldiagnosticlab.com*. Your date of birth in the format ‘YYYYMMDD’ is your password to be used to open this report. *Note: Always check your spam/junk mail if you have not received your results in your standard inbox! **The easiest method of finding your results is to type the email address “labreport@clinicaldiagnosticlab.com” in your email’s search bar as results are often difficult to find when sent to the spam/junk folder.

Tryptase Ordering Recommendation Measure total tryptase to confirm mast cell activation in diseases such as mastocytosis, anaphylaxis, urticaria, and asthma. Not generally used acutely except where the diagnosis is unclear. Useful in the prognosis of systemic mastocytosis. Mnemonic EGGWHOLE Methodology Quantitative ImmunoCAP Fluorescent Enzyme Immunoassay 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: Allow serum to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to a Standard Transport Tube. (Min: 0.5 mL) Storage/Transport Temperature: Frozen. Unacceptable Conditions: Hemolyzed, icteric, or lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 72 hours; Frozen: 1 month Reference Interval Less than 11.0 µg/L Interpretive Data Compliance Category: FDA Note This test measures total tryptase and does not distinguish between the alpha and beta protein types. Samples should preferably be collected between 15 minutes and three hours after the event suspected to have caused mast cell activation. CPT Code 83520 Components Component Chart Name Tryptase Component Test Code 0099173 LOINC 21582-2 Aliases Total Tryptase Tryptase, Autopsy (Tryptase)

About Clinical Diagnostic Laboratories Our main goal is to provide an alternative testing facility for individuals: doctors, as well as hospitals that are 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. Schedule An Appointment Commemorated as Local Heroes to the Community Throughout the years, Clinical Diagnostic Laboratories has worked extensively to provide testing and our services to organizations and government officials regularly to maintain a safe environment for everyone. During the peak of the COVID-19 Pandemic, Clinical Diagnostic Laboratories provided additional assistance to help guarantee the safety of the community. Due to their efforts, they were awarded by Fairfax County with the Community Hero Award. You can read more using the button below. Read More Here One of the Best at What We Do! We help medical facilities, individual patients, large companies, and organizations. Below are a few of the groups we’ve partnered with. View Our Capability Statement What Others Say About Us For over 5 years, our facility has continued to provide excellent, quality service to many patients. Here’s what they say about us and our laboratory. Leave a Review

Cardiolipin Antibody, IgG Ordering Recommendation Acceptable initial test when antiphospholipid syndrome (APS) is strongly suspected. Order with Lupus Anticoagulant Reflexive Panel (0030181 ) and Beta-2 Glycoprotein 1 Antibodies, IgG and IgM (0050321 ). Cardiolipin Antibodies, IgG and IgM (0099344 ) is preferred. Mnemonic AC-IGG Performed Mon-Sat Methodology Semi-Quantitative Enzyme-Linked Immunosorbent Assay Reported 1-2 days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Serum separator tube. Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to a Standard Transport Tube. (Min: 0.3 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Plasma or other body fluids. Contaminated, heat-inactivated, hemolyzed, or lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year Reference Interval <=14 GPL Negative ​ 15-19 GPL Indeterminate 20-80 GPL Low to Moderately Positive 81 GPL or above High Positive Interpretive Data Anti-mitochondrial antibodies (AMA) are thought to be present in 90-95% of patients with primary biliary cholangitis (PBC). However, the frequency of detected antibodies may be cohort or assay dependent, as lower sensitivities have been reported. Not all PBC patients are positive for AMA; some patients may be positive for SP100 and/or GP210 antibodies. A negative result does not rule out PBC. Compliance Category: FDA Note CPT Code 86381 Components Component Chart Name Cardiolipin Antibody IgG Component Test Code 0050901 LOINC 3181-5 Aliases ACA aCL aCL Antibody aCL IgG Anti-Cardiolipin Anticardiolipin Anticardiolipin Antibodies Cardiolip

Patient Test Results If you provided a doctor's order/referral, your results will be delivered to your physician either via fax or via their portal (if they have established an account with us). If you did not provide an order/referral, your results will be sent to you directly via email in the form of a PDF file. ​ Patients are able to request a copy of their results at any time. If you'd like to request a copy of your lab results, please contact us using the button below. Email Us About Lab Results

Terms & Conditions 1. Acceptance of Terms Welcome to Clinical Diagnostic Laboratories ("we," "us," or "our"). By accessing or using our services, including our website and any related applications (collectively referred to as the "Services"), you agree to comply with and be bound by these Terms and Conditions. If you do not agree to these terms, please refrain from using our Services. 2. Services Offered Clinical Diagnostic Laboratories provides comprehensive diagnostic testing services including, but not limited to, blood panels, allergy tests, COVID tests, and Influenza tests. These services are available at our two separate locations: 2 Pidgeon Hill Dr., Suite 150, Sterling, VA 20165, and 44355 Premier Plaza, Suite 240, Ashburn, VA 20147. 3. Test Accuracy and Interpretation While we strive to provide accurate and reliable test results, it is important to note that medical tests may have limitations and potential variations. Test results should be interpreted by qualified medical professionals, and we strongly recommend consulting a healthcare provider for accurate diagnosis and treatment recommendations based on the test results. 4. Privacy and Data Security We are committed to protecting your privacy and the security of your personal and medical information. Our Privacy Policy outlines the types of data we collect, how it is used, and the measures we take to safeguard your information. By using our Services, you agree to our Privacy Policy. 5. Payment and Billing We offer various payment options for our services. Payment details, including pricing and payment methods, are available on our website and will be provided during the checkout process. Any additional fees, taxes, or charges associated with the services will be clearly communicated. 6. Appointments and Cancellations Appointments for tests are subject to availability and can be scheduled through our website or by contacting our customer service. If you need to cancel or reschedule an appointment, please provide notice in advance according to our cancellation policy, which will be communicated during the appointment scheduling process. 7. Test Preparation Instructions Specific tests may require certain preparations, such as fasting or medication restrictions. Customers are responsible for following these instructions to ensure accurate test results. 8. Turnaround Time for Results We strive to provide test results within a specific timeframe. However, factors such as test complexity and demand may impact the turnaround time. 9. Refund and Return Policy If services are paid for but not utilized, our refund and return policy applies. Details can be found on our website or obtained by contacting customer service. 10. Communication Channels For inquiries, support, or appointment scheduling, contact us via email, phone, or our designated customer portal. 11. Insurance and Coverage Information about insurance coverage, billing procedures, and reimbursement for services covered by insurance can be found on our website or by contacting us directly. 12. Laboratory Accreditation and Certifications Clinical Diagnostic Laboratories maintains specific accreditations and certifications that demonstrate our commitment to q uality and accuracy. 13. Health and Safety Measures To ensure a safe testing environment, we adhere to rigorous health and safety protocols for the protection of both patients and staff. 14. Dispute Resolution Any disputes will be resolved through mediation or arbitration, with the applicable jurisdiction specified. 15. Legal Disclaimers Our services are for diagnostic purposes only. Customers should consult healthcare professionals for medical advice and treatment. 16. User Accounts (if applicable) If you create a user account on our platform, terms related to account creation, management, and security apply. 17. Governing Law These Terms and Conditions are governed by and construed in accordance with the laws of the state of Virginia, without regard to its conflict of laws principles. 18. Conta ct Us If you have any questions, concerns, or feedback regarding these Terms and Conditions or our Services, please contact us at: Clinical Diagnostic Laboratories 2 Pidgeon Hill Dr., Suite 150, Sterling, VA 20165 44355 Premier Plaza, Suite 240, Ashburn, VA 20147 Email: info@clinicaldiagnosticlab.com Phone: (703) 430-1111 Fax: (703) 722-3890

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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 ​ ​

Allergens, Food, Common Adult Food IgE Ordering Recommendation Mnemonic FOOD ADULT Performed Sat-Sun Methodology Quantitative ImmunoCAP Fluorescent Enzyme Immunoassay Reported 1-3 Days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Multiple patient encounters should be avoided. Collect: Serum separator tube. Multiple specimen tubes should be avoided. Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Transfer 2.25 mL serum to a Standard Transport Tube. (Min: 1.04 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Hemolyzed, icteric, or lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year Reference Interval Test Number Components Reference Interval Immunoglobulin E Age Reference Interval (kU/L) 0-5 months 13 or less 6-12 months 34 or less 1-2 years 97 or less 3 years 199 or less 4-6 years 307 or less 7-8 years 403 or less 9-12 years 696 or less 13-15 years 629 or less 16-17 years 537 or less 18 years and older 214 or less Less than or equal to 0.34 kU/L Less than or equal to 0.34 kU/L Allergen, Food, Egg White IgE Allergen, Food, Milk (Cow) IgE Less than or equal to 0.34 kU/L Less than or equal to 0.34 kU/L Less than or equal to 0.34 kU/L Less than or equal to 0.34 kU/L Allergen, Food, Peanut IgE Allergen, Food, Shrimp IgE Allergen, Food, Soybean IgE Allergen, Food, Wheat IgE Less than or equal to 0.34 kU/L Less than or equal to 0.34 kU/L Allergen, Food, Codfish IgE Allergen, Food, Corn IgE Less than or equal to 0.34 kU/L Less than or equal to 0.34 kU/L Allergen, Food, Walnut (Juglans spp) IgE Allergen, Food, Clam IgE Less than or equal to 0.34 kU/L Allergen, Food, Scallop IgE Reference Interval Allergen results of 0.10-0.34 kU/L are intended for specialist use as the clinical relevance is undetermined. Even though increasing ranges are reflective of increasing concentrations of allergen-specific IgE, these concentrations may not correlate with the degree of clinical response or skin testing results when challenged with a specific allergen. The correlation of allergy laboratory results with clinical history and in vivo reactivity to specific allergens is essential. A negative test may not rule out clinical allergy or even anaphylaxis. Reporting Range (reported in kU) Class Scoring Probability of IgE Mediated Clinical Reactionported in kU) Less than 0.10 No significant level detected 0 0.10-0.34 Clinical relevance undetermined 0/1 0.35-0.70 Low 1 0.71-3.50 3.51-17.50 Moderate High 2 3 17.51-50.00 Very High 4 50.01-100.00 Very High 5 Greater than 100.00 Very High 6 Compliance Category: FDA Note Allergens included in this panel: Clam, Egg White, Codfish/Whitefish, Corn, Milk (Cow's), Peanut, Shrimp, Scallop, Soybean, Walnut, Wheat, and IgE Serum Total CPT Code 86003 x11; 82785 Components Component Test Code Component Chart Name LOINC 19113-0 Allergen, Food, Egg White IgE Allergen, Food, Peanut IgE Allergen, Food, Shrimp IgE Allergen, Food, Milk (Cow) IgE 6106-9 7258-7 6206-7 6246-3 Immunoglobulin E 0050345 0055013 0055020 0055024 0055030 Allergen, Food, Soybean IgE Allergen, Food, Wheat IgE 6248-9 6276-0 0055031 0055034 Allergen, Food, Codfish IgE Allergen, Interp, Immunocap Score IgE 6082-2 33536-4 0055036 0055041 Allergen, Food, Corn IgE Allergen, Food, Walnut (Juglans spp) IgE 6087-1 33536-4 0055078 0055209 Allergen, Food, Clam IgE Allergen, Food, Scallop IgE 6076-4 7691-9 0099488 0099495