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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 on Saturday, Sunday, and major Holidays are by appointment only 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. “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” About Us 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 We Accept Most Insurances At our Medical Laboratory, we accept most forms of insurance. We strive to make our services as accessible as possible, so nearly all forms of insurance are accepted. However, we recommend that you check with your insurance provider to make sure your coverage is up-to-date. ​ 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

Rheumatoid Factor (RF) Ordering Recommendation Aids in the workup of suspected rheumatoid arthritis or undifferentiated inflammatory arthritides. Consider ordering this test in conjunction with Cyclic Citrullinated Peptide (CCP) Antibody, IgG (0055256 ) to increase specificity and sensitivity. Rheumatoid Arthritis Panel (3004055 ) is the preferred test. Mnemonic Methodology Quantitative Immunoturbidimetry Performed Mon-Sat Reported Within 24 hours New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Fasting specimen preferred. Collect: Serum separator tube or plasma separator tube. Also acceptable: Green (lithium heparin), lavender or pink. Specimen Preparation: Allow the specimen to clot completely at room temperature. Transfer 0.5 mL serum or plasma to a Standard Transport Tube. (Min: 0.5 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: 24 hours; Refrigerated: 8 days; Frozen: 3 months (should not be thawed more than once) Reference Interval 0-14 IU/mL Interpretive Data Note CPT Code 86431 Components Component Chart Name Rheumatoid Factor Component Test Code 0050465 LOINC 11572-5 Aliases RA RF Rheumatoid Arthritis Factor

Beta-2 Glycoprotein 1 Antibody, IgA Ordering Recommendation Preferred second-line test when seronegative antiphospholipid syndrome (APS) is strongly suspected. Order incrementally or concurrently with other noncriteria antiphospholipid antibody tests. May also be useful in estimating risk of thrombosis and/or pregnancy-related morbidity in patients with SLE. Mnemonic B2GPI A 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. Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Plasma or other body fluids. Contaminated, hemolyzed, grossly icteric, or severely lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) Reference Interval <=20 SAU Interpretive Data Compliance Category: FDA Note MPL = IgM phospholipid units CPT Code 86146 Components Component Chart Name B2Glycoprotein 1, IgA Antibody Component Test Code 0050324 LOINC 21108-6 Aliases Anti-B2-Glycoprotein 1 Anti-B2-Glycoprotein I Anti-B2-GP 1 Anti-B2-GP I Anti-B2-GP1 Anti-B2-GPI Anti-Beta-2-Glycoprotein I APOH Apolipoprotein H B2 IgA B2-glycoprotein 1 IgA B2GP1 IgA Beta 2GP1 Ab

SCHEDULE AN APPOINTMENT Clinical Diagnostic Laboratories is a leading medical laboratory providing a wide variety of tests and services, such as routine blood work, H. Pylori tests, STD testing, drug screening, allergy testing, COVID-19, Flu, and much more. Use our easy scheduling tool below to make an appointment. Also, be sure to check out our FAQs page to address any problems you might have. You may also use our live chat feature on the bottom right, email us , or give us a phone call at (703) 430-1111 .

​ Thyroid Peroxidase (TPO) Antibody Ordering Recommendation Not recommended for initial thyroid disorders testing. Distinguish thyroid autoimmune disorders from nonautoimmune disease or hypothyroidism. Mnemonic AMICR Methodology Quantitative Chemiluminescent Immunoassay 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. Also acceptable: Lavender (EDTA), pink (K2 EDTA), or green (sodium or lithium heparin). Specimen Preparation: Transfer 0.5 mL serum or plasma to a Standard Transport Tube. (Min: 0.3 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Grossly hemolyzed or lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 8 hours; Refrigerated: 1 week; Frozen: 6 months Reference Interval 0.0-9.0 IU/mL Interpretive Data Compliance Category: FDA Note CPT Code 86376 Components Component Chart Name Thyroid Peroxidase (TPO) Antibody Component Test Code 0050075 LOINC 8099-4 Aliases Anti-Microsomal Antibody Anti-TPO Antimicrosomal Antibody Antithyroid Antibodies Antithyroid Antibodies, Microsomal Antibodies Microsomal Antibodies, MMLNE Microsomal Antibody Thyroid Antibody Group Thyroid Autoantibodies Thyroid Microsomal Ab Thyroid Microsomal Antibody Thyroid Peroxidase Thyroperoxidase Antibody TPOAb

Tissue Transglutaminase (tTG) IgG Ordering Recommendation Recommended single screening test for IgA-deficient individuals with suspected celiac disease. (IgA testing recommended to identify IgA deficiency.) ​ 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 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: Remove 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: Refrigerated Unacceptable Conditions: Refrigerated. Remarks: Plasma. Hemolyzed or severely lipemic specimens. Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year Reference Interval 5 U/mL or less 6-9 U/mL Negative Weak Positive 10 U/mL or greater Positive Interpretive Data The tTG IgG assay may aid in the diagnosis of gluten-sensitivity enteropathy (i.e., celiac disease, dermatitis herpetiformis) in tTG IgA negative patients with confirmed IgA deficiency. A negative tTG IgG test alone does not rule out gluten-sensitive enteropathy. Note Human recombinant tTG antigen is utilized in this assay CPT Code 86364 Components Component Chart Name Tissue Transglutaminase (tTG) Ab, IgA Component Test Code 0056009 LOINC 56537-4 Aliases Tissue Transglutaminase Transglu taminase tTG tTG IgG

Beta-2 Glycoprotein 1 Antibodies, IgG and IgM Ordering Recommendation Acceptable initial test when antiphospholipid syndrome (APS) is strongly suspected. Order with Lupus Anticoagulant Reflexive Panel (0030181 ) and Cardiolipin Antibodies, IgG and IgM (0099344 ). May also be useful in estimating risk of thrombosis and/or pregnancy-related morbidity in patients with systemic lupus erythematosus (SLE). Mnemonic B2GPI PAN 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. (Min: 0.3 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Plasma or other body fluids. Contaminated, hemolyzed, grossly icteric, or severely lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) Reference Interval Reference Interval Components <=20 SGU B2Glycoprotein 1, IgG Antibody <=20 SMU B2Glycoprotein 1, IgM Antibody Interpretive Data The persistent presence of IgG and/or IgM beta 2 glycoprotein I (B2GPI) antibodies is a laboratory criterion for the diagnosis of antiphospholipid syndrome (APS). Persistence is defined as moderate or high levels of IgG and/or IgM B2GPI antibodies detected in two or more specimens drawn at least 12 weeks apart (J Throm Haemost. 2006;4:295-306). B2GPI results greater than 20 SGU (IgG) and/or SMU (IgM) are considered positive based on the cutoff values established for this test. International reference materials and consensus units for anti-B2GPI antibodies have not been established (Clin Chim Acta. 2012;413(1-2):358-60; Arthritis Rheum. 2012;64(1):1-10.); results can be variable between different commercial immunoassays and cannot be compared. Strong clinical correlation is recommended for a diagnosis of APS. Low positive IgG and IgM B2GPI antibody levels should be interpreted in light of APS-specific clinical manifestations and/or other criteria phospholipid antibody tests. Compliance Category: FDA Note MPL = IgM phospholipid units CPT Code 86146 x2 Components Component Chart Name B2Glycoprotein 1, IgG Antibody Component Test Code 0050322 LOINC 44448-9 0050323 B2Glycoprotein 1, IgM Antibody 44449-7 Aliases Anti-B2-Glycoprotein 1 Anti-B2-Glycoprotein I Anti-B2-GP 1 Anti-B2-GP1 Anti-B2-GPI Anti-beta-2 glycoprotein 1 Anti-beta-2 glycoprotein I Apolipoprotein H Apolipoprotein H, APOH B2 Glycoprotein 1 antibodies B2GP Antibodies B2GP1 B2GPI IgG, IgM BECKY Beta 2 GP1 Ab IgG Beta 2 GP1 Ab IgM Beta 2GP1 Ab Beta 2Glycoprotein 1

Services for Organizations and Employers Available for All of Your Testing Needs! At our Medical Laboratory, we understand that testing your new employees might be difficult. We have you covered with our wide variety of comprehensive testing services, including COVID, Flu, Urine Drug Screenings, and much more. We make receiving results fast, efficient, and easy, so you can quickly and confidently move forward with your employee onboarding process. As a private lab, we strive to make the process of testing your employees fast, efficient, and easy. In order to provide the highest level of service to patients, organizations, and physicians we work with, we go the extra mile to make sure you have the results you need quickly and simply. For any questions or more information, contact us using the button below. CONTACT US

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Services for Life Insurance Companies We Care About Your Applicants Clinical Diagnostics Laboratories cares about your applicants and their goal to acquire life insurance. We promise to provide your life insurance applicants with professional laboratory testing to assist in their application process that is done with dignity. We provide laboratory testing using state-of-the-art testing equipment. With the ability to gain results in 24hrs with easy scheduling options . Our highly skilled professionals are on standby to treat your applicants with the highest degree of care and efficiency. Click here today to get started. Contact Us