Medicare Part B â Your Medical Coverage. Part B pays for a portion of your doctor visits, some home health care, medical equipment, outpatient procedures, rehabilitation therapy, laboratory tests, X-rays, mental health services, ambulance services and blood.
Yellow phlegm is normally a sign of an infection, or a case of the common cold. Greenish or brownish phlegm is nearly always a sign of infection. Greenish or rusty phlegm or phlegm with rusty spots can also be a sign of pneumonia. Coughing up brown phlegm is also a common symptom of excessive smoking.
Green or Dark Yellow Phlegm. A thick and dark yellow phlegm may be a sign of a viral or bacterial infection, sinus infection, or lower respiratory tract infection. Typically, this occurs when the immune system sends white blood cells, known as neutrophils, to the area of infection.his causes the mucus to stagnate and dry out, leading to a white discharge. Meanwhile, coughing up gray phlegm may be a sign that the body is trying to get rid of resins or tars that accumulated from excessive smoking or inhalation of large amounts of air pollutants like smog or dust.