How long is a chest X-ray for a positive PPD good for?

As long as you like. The procedure of yearly cxrs in PPD positive workers is archaic since if reactivation occurs, so will symptoms. It is a needless risk of radiation. Although if never done, a base line cxrs is reasonable.

Related Questions

I had a positive PPD & have been asked for a chest x-ray. If the chest xray is negetive will I still have to take the medication, if yes, for how long?

POSITIVE PPD. If the chest x-ray is negative that means you do not have ptb infection. Positive PPD can be due to previous vaccination, sensitivity to ppd, or exposure. Some mds give inh for 6 months prophylaxis. Infectious d. Specialist knows the current procedure. Read more...

If I have a positive PPD but negative chest xray do I need additional blood work?

Possibly. If your doctor is worried you may have TB there are blood tests that may be useful. Read more...
No Blood Work. Blood work is not needed in determining the meaning of a positive PPD (new positive versus historical positive (e.g. Bcg vaccination)) in context of medical history. The negative chest xray indicates no active disease and is a good thing. Read more...