Free Quest Diagnostics Blood Chemistry Lab Panel - 21 Biomarkers for New Customers.

The Hemoglobin A1c (HbA1c) Test measures average blood glucose over 2–3 months by detecting sugar attached to hemoglobin in red blood cells. It is used to diagnose diabetes, identify prediabetes, and monitor long-term blood sugar control. Doctors rely on the HbA1c test to evaluate treatment effectiveness, guide adjustments, and assess risk for complications, making it essential for diabetes care and metabolic health screening.

The CBC with H/H, RBC, Indices, WBC and Platelets Test evaluates overall blood health by measuring hemoglobin, hematocrit, red blood cell count, size and indices, white blood cell levels, and platelets. It helps detect anemia, infections, clotting disorders, and immune or bone marrow conditions. Frequently ordered in routine exams, this test supports diagnosis, monitoring of chronic disease, and assessment of general health.

The Lipid Panel Test checks six key blood lipids: total cholesterol, HDL cholesterol, LDL cholesterol, non-HDL cholesterol, triglycerides, and the Chol/HDL ratio. This panel assesses risk for cardiovascular disease, heart attack, and stroke by evaluating cholesterol balance and fat levels in the blood. Doctors use lipid panel results for routine screening, treatment monitoring, and guiding lifestyle or medication adjustments.

The Thyroid Stimulating Hormone (TSH) Test measures TSH levels in blood to assess thyroid function and diagnose hypothyroidism or hyperthyroidism. It evaluates how the thyroid controls metabolism, energy, weight, and heart rate. Doctors use the TSH test to investigate symptoms such as fatigue, hair loss, or mood changes. Frequently included in routine health exams, it is also key for monitoring thyroid disease treatment and overall endocrine balance.

The T3 Free Test measures free triiodothyronine (T3), the active thyroid hormone not bound to proteins, to assess thyroid function. It helps diagnose hyperthyroidism, hypothyroidism, goiter, and pituitary disorders. Doctors order this test to evaluate symptoms like fatigue, weight changes, anxiety, or irregular heartbeat and to monitor thyroid replacement or antithyroid therapy. The Free T3 Test provides key insight into metabolism, energy regulation, and overall endocrine health.

The T4 Free Test measures the level of free thyroxine (T4) in blood, the active thyroid hormone not bound to proteins. It helps diagnose thyroid disorders such as hypothyroidism, hyperthyroidism, and goiter, as well as pituitary conditions affecting hormone regulation. Doctors use this test to evaluate symptoms like fatigue, weight changes, hair loss, or irregular heartbeat and to monitor thyroid replacement or antithyroid therapy, providing insight into metabolic and endocrine health.

The Testosterone Total Male Test measures testosterone levels in men to assess reproductive, sexual, and hormonal health. It helps diagnose low testosterone (hypogonadism), infertility, and erectile dysfunction. Doctors use it to evaluate fatigue, muscle loss, or low libido and to monitor testosterone therapy, hormonal balance, bone health, and overall metabolism.

Patient must be male and 18 years of age or older.

The PSA Total Test measures prostate-specific antigen levels in blood to evaluate prostate health. Elevated PSA may indicate prostate cancer, benign prostatic hyperplasia (BPH), or prostatitis. Doctors use this test for early detection of prostate cancer, monitoring treatment, or assessing recurrence risk. Commonly recommended for men over 50 or those at higher risk, the PSA test supports diagnosis, prevention, and long-term prostate care.

The Follicle-Stimulating Hormone (FSH) Test measures FSH levels to evaluate reproductive and endocrine health in both men and women. In women, it helps assess infertility, irregular periods, menopause, or ovarian function. In men, it is used to check sperm production and testicular function. Abnormal results may indicate PCOS, pituitary disorders, or hormonal imbalance. Doctors order this test to guide fertility treatment, hormone therapy, and overall reproductive care.

The Estradiol (E2) Test measures levels of estradiol, the primary form of estrogen, to evaluate reproductive and hormonal health. It helps assess menstrual irregularities, fertility issues, menopause status, and estrogen-producing disorders. In men, it aids in diagnosing hormonal imbalances. Doctors use the estradiol test to monitor hormone therapy, ovarian function, and conditions affecting puberty, bone health, and overall endocrine balance.

The Progesterone Test measures progesterone levels in blood to evaluate ovulation, fertility, and menstrual health. It helps confirm whether ovulation has occurred, assess causes of infertility, and monitor hormone therapy or high-risk pregnancies. Doctors also use it to investigate abnormal bleeding, detect ovarian or adrenal disorders, and evaluate miscarriage risk. This test provides key insight into reproductive, hormonal, and overall endocrine health.

The Iron Total Test measures iron levels in blood to evaluate nutritional status, red blood cell production, and overall metabolic health. Abnormal levels may indicate iron deficiency anemia, chronic blood loss, or poor absorption, while high levels may suggest hemochromatosis, liver disease, or iron overload. Doctors use this test to investigate fatigue, weakness, or pallor and to monitor treatment. Results provide key insight into anemia and iron balance.

The Vitamin B12 Test measures cobalamin levels in blood to evaluate nutritional health, red blood cell production, and nervous system function. Low B12 can cause anemia, fatigue, weakness, memory problems, and nerve damage, while high levels may indicate liver or kidney disease. Doctors use this test to detect B12 deficiency, monitor treatment, and assess malabsorption conditions like pernicious anemia, Crohn’s disease, or celiac disease.

The Vitamin D 25-Hydroxy Total Test measures levels of 25-hydroxyvitamin D in blood to evaluate vitamin D status, bone health, and calcium balance. It helps detect deficiency, insufficiency, or toxicity, which can affect immune function, muscle strength, and risk of osteoporosis. Doctors use this test to assess overall nutritional health, monitor supplementation, and support diagnosis of metabolic or endocrine disorders linked to vitamin D.

The Uric Acid Test measures uric acid levels in blood to assess kidney function and detect gout, a form of arthritis caused by uric acid buildup. High levels may also signal kidney disease, kidney stones, or metabolic disorders, while low levels can occur with liver disease. Doctors use this test to investigate joint pain, swelling, or frequent urination, and to monitor treatment for gout, kidney stones, or chemotherapy-related complications.

The Lactate Dehydrogenase (LDH) Test measures LDH enzyme levels in blood to assess tissue damage and overall health. Elevated LDH may indicate conditions such as liver disease, heart attack, anemia, infections, or certain cancers, while low levels are uncommon. Doctors use this test to help diagnose disease, monitor treatment effectiveness, and track cell damage. It provides valuable insight into metabolic activity and organ function.

The Hepatic Function Panel Test measures liver enzymes, proteins, and bilirubin to assess liver health and function. It includes ALT, AST, ALP, albumin, total protein, and bilirubin levels. Abnormal results may indicate hepatitis, cirrhosis, fatty liver, or bile duct problems. Doctors use this test to investigate jaundice, nausea, abdominal pain, or fatigue and to monitor liver disease, alcohol use, or medication side effects affecting liver function.

The Basic Metabolic Panel (BMP) Test measures eight markers, including glucose, calcium, sodium, potassium, chloride, carbon dioxide, BUN, and creatinine, to evaluate kidney function, blood sugar, and electrolyte balance. Doctors use this panel to detect diabetes, dehydration, and kidney disease, or to monitor treatment. It is commonly ordered in routine exams, emergency care, or pre-surgical testing to assess overall metabolic and organ health.

The GGT Test measures gamma-glutamyl transferase, an enzyme found in the liver and bile ducts, to evaluate liver health. Elevated GGT may indicate liver disease, bile duct obstruction, alcohol use, or medication side effects. Doctors order this test to investigate symptoms like fatigue, jaundice, dark urine, or abdominal pain and to monitor liver damage. It is often performed with other liver tests to provide a complete picture of liver and bile duct function.

The Magnesium Serum Test measures magnesium levels in blood to evaluate electrolyte balance, nerve and muscle function, and overall metabolic health. Abnormal levels may indicate kidney disease, malnutrition, gastrointestinal disorders, or uncontrolled diabetes. Low magnesium can cause weakness, cramps, or irregular heartbeat, while high levels may signal kidney dysfunction. Doctors use this test to diagnose deficiencies, monitor therapy, or assess chronic health conditions.

The MMR Titer Test is a quantitative blood test that measures antibody levels to measles, mumps, and rubella. Results provide exact antibody values to confirm prior infection or response to vaccination. Low levels suggest lack of protection, while higher levels indicate adequate response. Doctors order this test for school, employment, or travel requirements and to guide revaccination decisions, ensuring accurate evaluation of immune status against these viral diseases.