- Machines designed to pump cold water into an inflatable wrap or brace, compressing the enveloped area of the body
- Magnesium Level
- Magnetic resonance angiography, head; without contrast material(s)
- Magnetic resonance imaging, breasts, without contrast material; bilateral
- Major gastrointestinal disorders and peritoneal infections
- Major joint/limb reattachment procedure of upper extremities
- Major small and large bowel procedures
- Mammogram Screening
- Mammography of both breasts
- Manipulation of 1 or more regions of the body
- Manipulation of knee joint under general anesthesia
- Manual urinalysis test with examination using microscope
- Mass spectrometry
- Measles, mumps, and rubella vaccine
- Measles, mumps, rubella, and varicella vaccine
- Measurement C-reactive protein
- Measurement of antibody (IgE) to allergic substance
- Measurement of antibody to noninfectious agent
- Measurement of complement (immune system proteins)
- Measurement of Complement (Immune System Proteins)
- Measurement of Hepatitis A antibody (IgM)
- Measure of lung function and gas exchange
- Measures how much air is in the lungs after taking a deep breath
- Medical back problems
- Medical service during off-hours
- Medical test to find an infection
- meningococcal conjugate vaccine
- Microbial toxin or antitoxin assay
- Micrographic technique, including removal of all gross tumor, surgica excision of tissue specimens, mapping, color coding of specimens, microscopic examination of specimens
- Microscopic examination for white blood cells