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Ordering information regarding a Deamidated Gliadin Peptide (DGP) Antibody, IgA test for Clinical Diagnostic Laboratories. Deamidated Gliadin Peptide (DGP) Antibody, IgA Ordering Recommendation Acceptable single screening test for celiac disease. IgA testing recommended to identify IgA deficiency. Use IgA test in individuals who are IgA competent. 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, IgA (0097709 ) 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: Plasma. Hemolyzed or severely lipemic specimens. 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 Human recombinant tTG antigen is utilized in this assay CPT Code 86258 Components Component Chart Name Deamidated Gliadin Peptide (DGP) Ab, IgA Component Test Code 0051357 LOINC 63453-5 Aliases Celiac Disease Antibodies Coeliac Disease Antib odies Deamidated Gliadin Antibodies (DGP) Deaminated Gliadin Peptide Antibodies DGP DGP Ab DGP IgA

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Ordering information regarding Clozapine for Clinical Diagnostic Laboratories. Creatinine, Serum or Plasma Ordering Recommendation Screening test to evaluate kidney function. Methodology Quantitative Enzymatic 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: Plasma separator tube or serum separator tube. Specimen Preparation: Allow serum tube to clot completely at room temperature. Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to a standard transport tube. (Min: 0.2 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Specimens obtained through catheters used to infuse hyperalimentation fluid. Specimens with potassium oxalate/sodium fluoride, citrate, or EDTA as anticoagulants. Remarks: Stability: After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 3 months Reference Interval By Report Interpretive Data Note Assay interference (negative) may be observed when high concentrations of N-acetylcysteine (NAC) are present. Negative interference has also been reported with NAPQI (an acetaminophen metabolite) but only with concentrations at or above those expected during acetaminophen overdose. CPT Code 82565 Components Component Test Code Component Chart Name LOINC 0020025 Creatinine, Serum or Plasma 2160-0 3004293 UH EGFR Aliases Blood Creatinine Serum Creatinine

Ordering information regarding an HPV Self Collection Screen for Clinical Diagnostic Laboratories. HPV Self-Collection Screening (HPV-SCS) Ordering Recommendation The HPV Cervical Cancer Self-Collection Test is a highly sensitive screening tool that enables patients to collect their own vaginal sample using an FDA-approved device. After collection, the specimen is processed using advanced nucleic acid amplification methods (typically PCR-based) to qualitatively detect high-risk HPV DNA associated with cervical cancer. This self-collected approach offers comparable diagnostic accuracy to traditional clinician-collected samples while minimizing discomfort and barriers associated with pelvic examinations, making it an effective option for early detection and timely clinical follow-up. Mnemonic HPV Self-Collection Screening (HPV-SCS) Methodology The specimen is processed using nucleic acid amplification techniques (generally PCR-based methods) to qualitatively detect the presence of high-risk HPV DNA. Performed Mon-Sat Reported Within 3-5 days Specimen Required Patient Preparation: Collect: Wash your hands and remove the sterile self-collection device before gently inserting it into the vagina up to the indicated marker. Rotate the device 2–3 times as instructed to collect an adequate sample, then carefully withdraw it. Refrain from douching, using intravaginal medications, or applying topical agents for at least 48 hours prior to collection. • Avoid sexual intercourse for 24–48 hours before sample collection. • If menstruating, confirm with the provider whether sample collection should be postponed until menses have ceased. Specimen Preparation: Immediately place the collection device into the provided vial containing the appropriate viral transport medium. Secure the vial cap tightly and gently invert the vial to mix the specimen with the medium. Ensure that the specimen is labeled accurately with patient identification and collection date/time. Storage/Transport Temperature: Maintain at 2–8°C during storage and transport. Avoid freezing unless the test kit instructions specifically allow it. Prompt transport to the laboratory is advised to maintain sample integrity. Unacceptable Conditions: Specimens that are unlabeled or improperly labeled. Inadequate sample volume or insufficient cellular material. Contaminated samples (e.g., with menstrual blood or external substances) beyond acceptable limits. Specimens showing leakage or compromised container integrity. Samples exposed to temperatures outside the recommended range prior to processing Remarks: Specimen source required. Stability: Reference Interval Negative Interpretive Data A positive result should be correlated with clinical history and may necessitate additional diagnostic procedures. Careful patient education on follow-up steps and interpretation of results is essential. This test should be used as a screening tool only; abnormal findings must be evaluated in conjunction with other clinical assessments. Note CPT Code 87624 Aliases HPV Cervical Cancer Self-Collection Self-Collected HPV Test HPV DNA Test (Self-Collected) Cervical HPV Self-Sampling

Ordering information regarding a Tryptase test for Clinical Diagnostic Laboratories. SARS-CoV-2 (COVID-19) Ordering Recommendation Use to detect the novel coronavirus (SARS-CoV-2). Mnemonic Methodology Qualitative Nucleic Acid Amplification (NAA) Performed Mon-Sat Reported 1-2 days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Nasopharyngeal swab, oropharyngeal swab, nasal swab, or saliva. To ensure the highest quality results, a nasopharyngeal swab is recommended. Specimen Preparation: Nasopharyngeal swab: Place in viral transport media Liquid Amies, or saline (minimum volume 1.2mL). Place each specimen in an individually sealed bag. Oropharyngeal or nasal swab: Place in viral transport media Liquid Amies, or saline (minimum volume 1.2mL). Swab Collection Kit. Place each specimen in an individually sealed bag. Saliva: Transport in COVID-19 Saliva Collection Tube Storage/Transport Temperature: Frozen. Unacceptable Conditions: Undiluted saliva. Saliva submitted in anything other than a Saliva Collection Tube. Swabs not in media. Wood swabs, calcium alginate swabs. Media with guanidine-containing materials, 'molecular media' that indicates inactivation of pathogens and preservation of RNA/DNA, charcoal media. Specimens sent in tubes with pop-top lids/caps. Specimens in glass tubes. Remarks: Stability: Swabs: Ambient: Unacceptable; Refrigerated: 2 days; Frozen: 1 month Saliva: Ambient: 5 days; Refrigerated: 5 days, Frozen: 5 days Reference Interval Interpretive Data This test should be ordered for the detection of the 2019 novel coronavirus SARS-CoV-2 in individuals who meet SARS-CoV-2 clinical and/or epidemiological criteria. The Coronavirus SARS-CoV-2 (COVID-19) by nucleic acid amplification test is for in vitro diagnostic use under the FDA Emergency Use Authorization (EUA) for U.S. laboratories certified under CLIA to perform high complexity tests. Not Detected results do not rule out the presence of PCR inhibitors in the patient specimen or assay-specific nucleic acid in concentrations below the level of detection by the assay. Detected results are indicative of the presence of SARS-CoV-2 RNA. Due to the complexity of nucleic acid amplification methodologies, there may be a risk of false-positive results. Clinical correlation with patient history and other diagnostic information is necessary to determine patient infection status. Reliable results are dependent on adequate specimen collection, transport, storage, and handling. Compliance Category: Depends on Specimen/Source/Method Note CPT Code 87635 Components Component Chart Name SARS-CoV-2 Source Component Test Code 3002639 LOINC 31208-2 3002640 SARS-CoV-2 by NAA 94500-6 Aliases 2019-nCoV Coronavirus disease - 2019 COVID-19 COVID-19 Illness COVID-2019 SARS-CoV-2

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

Ordering information regarding a Basic Metabolic Panel test for Clinical Diagnostic Laboratories. Basic Metabolic Panel Ordering Recommendation Methodology Quantitative Ion-Selective Electrode/Quantitative Enzymatic Assay/Quantitative Spectrophotometry 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: Allow serum tube to clot completely at room temperature. Separate serum or plasma from cells ASAP within 30 minutes of collection. Transfer 1 mL serum or plasma to a Standard Transport Tube. (Min: 0.3 mL) Storage/Transport Temperature: Specimens collected in EDTA, citrate, or oxalate. Unacceptable Conditions: EDTA, citrate, oxalate, or sodium fluoride/potassium oxalate. 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 By report (reports may vary based on instrumentation) Interpretive Data Note his panel includes: Calcium, Serum or Plasma (0020027), Carbon Dioxide, Serum or Plasma (0020004), Chloride, Serum or Plasma (0020003), Creatinine, Serum or Plasma (0020025), Glucose, Serum or Plasma (0020024), Potassium, Plasma or Serum (0020002), Sodium, Plasma or Serum (0020001), and Urea Nitrogen, Serum or Plasma (0020023). CPT Code 80048 Components Component Test Code Component Chart Name LOINC 0020001 Sodium, Serum or Plasma 2951-2 0020002 Potassium, Serum or Plasma 2823-3 0020003 Chloride, Serum or Plasma 2075-0 0020004 Potassium, Serum or Plasma 2028-9 0020023 Urea Nitrogen, Serum or Plasma 3094-0 0020024 Glucose, Serum or Plasma 2345-7 0020025 Creatinine, Serum or Plasma 2160-0 0020027 0020396 Calcium, Serum or Plasma Anion Gap 17861-6 33037-3 3004293 UH EGFR Aliases C12 Chem 12 Chemistry Panel Chemistry Screen CMP SMA 12 SMA 20 SMAC

Ordering information regarding a PTINR test for Clinical Diagnostic Laboratories. Prothrombin Time/International Normalized Ratio (PTINR) Ordering Recommendation Initial test for evaluating bleeding disorders and monitoring oral anticoagulation therapy (warfarin/Coumadin). Methodology Electromagnetic Mechanical Clot Detection Performed Mon-Sat Reported 1-2 days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Lt. blue (sodium citrate) Specimen Preparation: Transfer 1 mL platelet-poor plasma to a Standard Transport Tube. (Min: 0.5 mL) Storage/Transport Temperature: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Unacceptable Conditions: Serum. EDTA plasma, clotted or hemolyzed specimens. Remarks: Stability: Ambient: 24 hours; Refrigerated: Unacceptable; Frozen: 2 weeks Reference Interval Components Available Separately Reference Interval International Normalized Ratio Coumadin Therapy: INR: 2.0-3.0 conventional anticoagulation INR: 2.5-3.5 intensive anticoagulation Prothrombin Time 12.0-15.5 seconds Interpretive Data Note Reference intervals established using 3.2 percent sodium citrate. CPT Code 85610 Components Component Test Code Component Chart Name LOINC 0030220 Prothrombin Time 5902-2 0030223 International Normalized Ratio 6301-6 Aliases INR Pro Time Protime Protime, PT/INR PT/International Normalized Ratio

Ordering information regarding a ​Rheumatoid Factor (RF) for Clinical Diagnostic Laboratories. 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

Frequently asked questions 01 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. 02 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. 03 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. 04 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. 05 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. 06 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. 07 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. 08 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. 09 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 (https://cdlcovid.as.me/schedule.php?owner=19300484&)ahead of time, contact us via our email form, or call in advance to verify the availability of a Phlebotomist (if bloodwork is required). 10 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 24-72 hours. We recommend contacting us ahead of time for more details based on the specific test being administered. 11 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] 12 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. 13 How Long Does it Take to Receive COVID test results? The standard turnaround time for PCR-COVID test results is 24 hours. 14 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. 15 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. 16 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. 17 What is the Difference Between a Rapid Test and a PCR test? The Rapid test (https://www.cdc.gov/coronavirus/2019-ncov/lab/resources/antigen-tests-guidelines.html)(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 (https://www.cdc.gov/coronavirus/2019-ncov/lab/resources/sars-cov2-testing-strategies.html)(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. 18 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. 19 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.