Ordering information regarding a Tissue Transglutaminase (tTG) IgG test for Clinical Diagnostic Laboratories. 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

Purchase a pre-built laboratory panel to maintain your health and vitality without the hassle of insurance, a doctor's order, or unreasonable costs. Affordable Lab Testing - No Doctor Required Get the bloodwork you need, when you need it — without insurance, referrals, or hidden fees. Shop Our Panels How Does it Work? At Clinical Diagnostic Laboratories, we understand how frustrating affordable healthcare can be. Between insurance delays, surprise bills, medical jargon, and waiting weeks for lab results, it’s no wonder people avoid getting the tests they need. That’s why we’ve built a simple, self-pay solution — no referrals, no insurance, no hassle. No doctor's order or referral needed No insurance required - ever! Transparent pricing with no surprise bills Skip the copays, deductible, and delays Schedule your appointment after purchase - no walk-ins, no crowds Fast, accurate results from a CLIA-certified lab Perfect for wellness tracking, hormone balance, STD screening, and more! Designed for busy professionals, self-pay patients, and the health-conscious Simple online ordering in minutes Shop Our Panels What To Expect 1. Choose a Pre-Built Test Panel We've designed targeted panels to address common concerns like fatigue, hormone imbalance, STD screening, and more - no guesswork required. 3. Schedule Your Lab Visit After purchase, you'll receive a link to schedule your appointment at our local lab. No walk-ins for pre-ordered tests means no waiting rooms. 2. Pay Securely Online Flat-rate pricing with no hidden fees. No copays, deductibles, or confusing insurance claims to worry about. 4. Get Results in 2-5 Days Most test results are delivered straight to your inbox as a secure, easy-to-read PDF. Shop Our Panels At Clinical Diagnostic Laboratories, your personal health information is kept strictly confidential. We follow all HIPAA guidelines to ensure your data is secure, your test results are private, and your experience is handled with the highest level of discretion. Your information will never be shared without your explicit consent.

Ordering information regarding a C-Reactice Protein test for Clinical Diagnostic Laboratories. C-Reactive Protein Ordering Recommendation Preferred test to detect acute phase inflammation (eg, autoimmune diseases, connective tissue disease, rheumatoid arthritis, infection, or sepsis). DO NOT ORDER for cardiovascular disease (CVD) risk assessment. Test for CVD risk assessment is C-Reactive Protein, High Sensitivity 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: 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: 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 By report (reports may vary based on instrumentation) Interpretive Data By report (reports may vary based on instrumentation) Note CPT Code 86140 Components Component Test Code Component Chart Name LOINC 0050180 C-Reactive Protein 1988-5 Aliases C- Reactive Protein C- Reactive Protein, S CRP CRP, S CRP, Serum Protein, C-Reactive

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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

Ordering information regarding Creatinine 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 Clozapine for Clinical Diagnostic Laboratories. Clozapine and Metabolites, Serum or Plasma, Quantitative Ordering Recommendation Optimize drug therapy and monitor patient adherence. Methodology Quantitative Liquid Chromatography-Tandem Mass Spectrometry Performed Mon-Sat Reported 1-5 Days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Timing of specimen collection: Predose(trough) draw - at steady -state concentration. Collect: Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2EDTA). Specimen Preparation: Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to a standard transport tube.(Min: 0.5 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution). Remarks: Stability: After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 3 months Reference Interval Therapeutic Range Not well established Toxic Level Total Clozapine and Metabolites: Greater than or equal to 1500 ng/mL Interpretive Data Therapeutic ranges are not well established. Clozapine is metabolized to norclozapine and clozapine-N-oxide. Clozapine concentrations between 100 and 700 ng/mL may correlate more with clinical response; however, nonresponsiveness may also occur within this range. For refractory schizophrenia, clozapine concentrations greater than 350 ng/mL are suggested to achieve a therapeutic response. Toxicity: Adverse effects to clozapine therapy may include tachycardia, drowsiness, hypotension, and seizures. Therapeutic and toxic ranges are not well established in children. Note CPT Code 80159 Components Component Test Code Component Chart Name LOINC 2013458 Clozapine, S/P, Quant 6896-5 2013459 Norclozapine, S/P, Quant 10992-6 2013460 Clozapine-N-Oxide, S/P, Quant 85497-6 2013461 Total Clozapine and Metabolites 12375-2 Aliases Clopine Clozaril Denzapine FazaClo Versacloz Zaponex

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

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 >

View a complete list of participating insurances here at Clinical Diagnostic Laboratories. Contact us for more information. PARTICIPATING INSURANCE COMPANIES Clinical Diagnostics Laboratories will file all claims with the below-listed insurance companies. The list below is not a complete list of Health plans with which CDL participates and is subject to change over time. There may be exceptions in certain areas or for certain members or plans. If you have any questions or do not see your insurance company listed here, please contact us. AARP Adventist HealthCare Aetna (PPO) American Postal Workers Union (APWU) AmeriGroup Health AmeriHealth Anthem Assurant Health Beechstreet Benefit Plan Administrators VA Blue Cross Blue Shield of VA PPO, KeyCare, Cova, Medicare Advantage PPO Anthem Blue Cross (PPO, Medicare PPO)Blue Cross Blue Shield of West VA BRMS Capital Blue Cross (PPO Only) Care Improvement Plus-United Health CareFirst BCBS CareLink CareNet Celtic Insurance ChoiceCare Cigna (Multiplan) Cofinity Compass Rose Conifer Health Solution CoreSource Corvel Coventry National PPO Emblem Health (PPO Only) Empire BCBS (PPO Only) Federal and State Benefit Health Plans FEHBP FedMed Inc First Health National PPO Network Fortis Insurance -Assurant Galaxy Health Network GEHA-(First Health) Geisinger Health Great West HealthAmerica HealthPartners Network HealthScope Services HealthSmart Preferred Networks Highmark BCBS (PPO Only) Horizon BCBS (PPO Only) Humana (All Plans) InterPlan Health Group-HealthSmart John Alden Insurance -Assurant Johns Hopkins Healthcare MagnaCare Mail Handlers Benefit Plan Maryland Physicians Care (MPC) MedCost (NovaNet) Medical Mutual Meritain Health Multiplan National Network NALC- Cigna, Multiplan National Capital PPO, Health Link National Care Network NCN National Claims Administrative Services (NCAS) NovaNet PPO OneNet PPO (United Health Care) Optima Health Network-Valley Health Net Paramount Health Care PayerFusion POMCO Prime Health Services Private Healthcare (PMCS) Pyramid Life Insurance Company Riverside Health(Maryland HealthChoice) Ryan White HIV/Aids Program SAMBA FEP StarMark Insurance Stratrose PPO, NPPN SummaCare PPO (Multiplan, PHCS) SuperMed PPO-1st Medical The Health Plan Three Rivers Provider Network Unicare UnitedHealthcare Virginia Health Network-MedCost Ultra, VHN Plus USA MCO Government Health Plans Medicaid VA, MD, and DC Medicare Advantage PPO Medicare Supplement Railroad Medicare Traditional Medicare Tricare Health Net Federal Services Humana Military TriCare for Life TriWest SCHEDULE AN APPOINTMENT Last Name Email Phone Type your message here... Submit Thanks for submitting! A member of our team will respond to your inquiry as soon as possible.