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H/O + (+ is circled) ppd means "history of positive PPD". It means the patient has had a PPD test in the past and the results were positive. The patient should not be given another PPD test because he will have a positive reaction again. PPD test is a skin screening test for tuberculosis.
http://www.medicinenet.com/tuberculosis_skin_test_ppd_skin_test/article.htm
jen4santo
4 Posts
What does this mean H/O (history of) + (+ is circled) ppd