Tests
MCV (Mean Corpuscular Volume)
MCV stands for mean corpuscular volume. An MCV blood test measures the average size of your red blood cells.
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Tests
MCV stands for mean corpuscular volume. An MCV blood test measures the average size of your red blood cells.
Tests
Meningococcal disease is the name for any infection caused by meningococcal bacteria (called Neisseria meningitidis ). Meningococcal disease tests look for these bacteria in your blood or cerebrospinal fluid (CSF), the fluid in spaces around your brain and spinal cord.
Tests
This test measures the amount of methylmalonic acid (MMA) in your blood or urine. MMA is a substance made in small amounts when you digest protein. MMA is needed for metabolism, which is the process that your body uses to change food into energy.
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A microalbumin creatinine ratio urine test checks the levels of the protein albumin in your urine (pee). Abnormal amounts of this protein may be an early sign of kidney disease .
Tests
MPV stands for mean platelet volume. Platelets (also called thrombocytes) are small blood cells that stick together to make blood clots that stop or slow bleeding when you have a cut or injury. Platelets are made in your bone marrow.
Tests
A MRSA test looks for MRSA bacteria in a sample of fluid or tissue from your body. The sample is often taken from your nose or a wound. MRSA stands for methicillin-resistant Staphylococcus aureus . It is a type of staph bacteria.
Tests
An MTHFR gene test checks a sample of your blood for two very common changes in a gene called MTHFR . Changes in your genes are also called gene variants or mutations.
Tests
Myasthenia gravis (MG) tests are used to diagnose MG, a chronic (long-lasting) autoimmune disease that causes weakness in muscles throughout your body. In autoimmune diseases, your immune system mistakenly attacks the healthy cells of your organs and tissues. If you have MG, your immune system makes antibodies that block or change the connection between your nerves and muscles.
Tests
Natriuretic peptides are proteins that your heart and blood vessels make. Natriuretic peptide tests measure the amount of these proteins in a sample of your blood. They are mainly used to help confirm or rule out heart failure in people who have symptoms.
Tests
A urinalysis test checks for different cells, chemicals, and other substances in a sample of your urine (pee). This includes checking for nitrites. Nitrites in your urine may be a sign of a urinary tract infection (UTI).
Tests
Opioid testing looks for opioids in a sample of your urine (pee), blood, saliva (spit), hair, or sweat.
Tests
Osmolality tests measure the amount of certain substances in your blood, urine, or stool (poop). The tests can show how your kidneys are working and whether you have an unhealthy fluid balance .