My wife got hcg done on advice of doctor yesterday and count was 14761. as suggested she had another test today and hcg count came 18976. is it good?

Pregnant: Beta-hCG tends to increase over the course of gestation until weeks 13-16 (and generally doubles in value every 2-3 days in a healthy fetus). After this time, the value starts to decrease ... So the value that you've given can't really be interpreted by itself as a stand alone number without more information. Should discuss further with your doctor. Hope that helps!