All Digestive System Tests

The Helicobacter pylori Antigen Stool Test detects H. pylori proteins in stool to diagnose active infection. H. pylori is a common cause of gastritis, ulcers, and increased stomach cancer risk. Doctors order this test for patients with abdominal pain, nausea, bloating, or indigestion. Noninvasive and accurate, results confirm active infection and are also used to monitor treatment effectiveness and eradication of H. pylori bacteria.

The Helicobacter pylori Urea Breath Test detects H. pylori infection, a common cause of ulcers and gastritis. After drinking a urea solution, breath samples are analyzed for carbon dioxide changes caused by the bacteria. A positive result indicates active infection, while a negative shows no evidence of H. pylori. Doctors use this noninvasive test to diagnose infection, confirm eradication after treatment, and monitor gastrointestinal health.

The Hemoglobin A1c with eAG Test measures average blood sugar levels over the past 2–3 months and provides an estimated average glucose (eAG) value for easier understanding. It is widely used to screen, diagnose, and monitor diabetes and prediabetes. Doctors use this test to evaluate long-term glucose control, adjust treatment, and reduce the risk of complications such as neuropathy, kidney disease, and heart problems linked to poor blood sugar management.

The Hemoglobinopathy Evaluation screens for abnormal hemoglobin variants and thalassemias by analyzing the types and amounts of hemoglobin in blood. This test helps diagnose sickle cell disease, beta thalassemia, alpha thalassemia, and other inherited disorders affecting red blood cells. Doctors use it to investigate anemia, unexplained blood abnormalities, or family history of hemoglobinopathies, guiding diagnosis, genetic counseling, and treatment planning.

The Hemogram Test provides a detailed blood profile including WBC, RBC, hemoglobin, hematocrit, red blood cell indices (MCV, MCH, MCHC, RDW), plus platelets and MPV. It assists in detecting anemia type, infection, hydration status, or bone marrow issues. This test offers insight into oxygen delivery, clotting status, immune function, and systemic wellness.

The Hemogram and Differential Test provides a detailed analysis of blood health by measuring red blood cells, white blood cells, hemoglobin, hematocrit, and platelets. The differential count breaks down types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils. This test helps detect anemia, infections, immune response, clotting disorders, and other hematologic or systemic conditions.

The Histamine Plasma Test measures histamine levels in the blood to help evaluate allergic reactions, mast cell disorders, or other conditions linked to abnormal histamine release. Elevated levels may indicate allergies, mastocytosis, or anaphylaxis, while low levels can affect digestive and immune function.

The HLA (Human Leukocyte Antigen) Typing for Celiac Disease test is a genetic test that identifies specific HLA gene variants associated with an increased risk of developing celiac disease. Celiac disease is an autoimmune disorder triggered by the ingestion of gluten, a protein found in wheat, barley, and rye. This test aids in assessing the genetic predisposition to celiac disease.

The IA-2 Antibody Test measures autoantibodies against the islet antigen-2 protein, associated with pancreatic beta cell destruction in type 1 diabetes. Positive IA-2 antibodies can help identify autoimmune activity before clinical onset, supporting risk assessment, early diagnosis, and monitoring of disease progression in individuals with suspected or confirmed autoimmune diabetes.

The IgA Subclasses Panel evaluates IgA1 and IgA2 subclasses, which are critical for mucosal defense and immune balance. Deficiencies may increase susceptibility to sinus, lung, or digestive infections and may also be linked to autoimmune disease. This test supports assessment of antibody function, systemic health, and conditions tied to mucosal immunity and immune dysregulation.

The Immunoglobulin E (IgE) Test measures IgE antibody levels in blood to evaluate allergic reactions, asthma, and immune response. Elevated IgE may indicate allergies to food, pollen, or other triggers, as well as eczema or parasitic infections. Doctors order this test to investigate symptoms like hives, sneezing, or wheezing and to guide allergy treatment. Results provide vital insight into immune health, allergic sensitivity, and overall diagnostic care.

The Immunoglobulin G (IgG) Test measures IgG antibody levels in blood to assess immune system function and long-term response to infections. Low IgG may indicate immune deficiencies or recurrent infections, while high levels may signal chronic inflammation, autoimmune disease, or certain infections. Doctors use this test to evaluate unexplained illness, monitor immune disorders, or assess overall immunity. Results provide vital insight into immune health and disease management.

The IgG Subclasses Panel measures four IgG antibody subclasses (IgG1, IgG2, IgG3, IgG4) to assess immune system function. Abnormal levels may indicate primary immunodeficiency, recurrent infections, autoimmune disease, or allergic conditions. Doctors order this test for patients with chronic sinus, lung, or ear infections or suspected immune imbalance. Results provide key insight into antibody response, guiding diagnosis, treatment, and long-term immune monitoring.

The Immunoglobulin M (IgM) Test measures IgM antibody levels in blood to evaluate immune response and early defense against infections. High IgM may indicate recent or acute infections, autoimmune disease, or certain blood disorders, while low levels may suggest immune deficiency. Doctors order this test to investigate recurrent infections, unexplained inflammation, or suspected immune problems. Results provide vital insight into antibody health, immune status, and diagnostic care.

The Immunofixation Serum Test identifies abnormal proteins in the blood called monoclonal immunoglobulins, often linked to multiple myeloma, Waldenström macroglobulinemia, or other plasma cell disorders. Physicians use this test to detect, classify, and monitor abnormal antibody production. Results help confirm suspected conditions, assess disease progression, and guide ongoing management of disorders affecting immune system function.

The Immunofixation (IFE) Urine test detects and characterizes monoclonal proteins (free light chains/M-proteins) excreted in urine to evaluate plasma cell and lymphoproliferative disorders. It supports workup of light-chain disease, multiple myeloma, Waldenström macroglobulinemia, and amyloidosis, and helps distinguish monoclonal from polyclonal free light chains seen with glomerular leak, infection, or inflammation.

The Immunoglobulin A (IgA) Test measures IgA antibody levels in blood to evaluate immune system health and mucosal defense in the respiratory and digestive tracts. Low IgA may indicate immune deficiency, celiac disease, or recurrent infections, while high levels may suggest autoimmune disorders, liver disease, or chronic inflammation. Doctors use this test to assess unexplained illness or immune imbalance. Results provide key insight into antibody function and overall immunity.

The Total Immunoglobulins Panel measures IgA, IgG, and IgM levels to evaluate immune system function. Abnormal results may indicate immune deficiency, chronic infections, autoimmune disorders, or certain blood cancers. IgA helps protect mucous membranes, IgG provides long-term defense, and IgM is the body’s first response to infection. Doctors use this blood test to diagnose, monitor, and manage immune-related conditions and overall immune health.

The Indican Urine Test measures indican, a byproduct of protein breakdown by intestinal bacteria. Elevated levels may indicate poor digestion, malabsorption, small intestinal bacterial overgrowth (SIBO), or gastrointestinal disorders. Doctors use this test to evaluate gut health, investigate symptoms like bloating, gas, or fatigue, and monitor treatment for digestive imbalances. It provides valuable insight into intestinal function, metabolism, and overall digestive health.

The Insulin Test measures insulin levels in blood to assess how the body regulates glucose and metabolism. It helps diagnose insulin resistance, hypoglycemia, type 2 diabetes, and metabolic syndrome. Doctors also use it to evaluate pancreatic function and monitor treatment effectiveness. Frequently ordered with glucose testing, the insulin test provides critical insight into endocrine health, blood sugar control, and risk for diabetes-related complications.

The Interleukin-6 (IL-6) Test measures levels of IL-6, a cytokine involved in immune response and inflammation. Elevated IL-6 may indicate infection, autoimmune disease, chronic inflammatory disorders, or certain cancers. Doctors order this test for patients with persistent fever, fatigue, or suspected sepsis. Results help assess inflammation severity, guide treatment, and monitor disease progression in autoimmune, infectious, or metabolic conditions.