Aside from Dr. Jekyll and Dr. Frankenstein, there are not a lot of doctors in Broadway musicals.

Yet a show about father-and-son physicians was written by perhaps the greatest songwriting team in Broadway history: the composer Richard Rodgers and the librettist Oscar Hammerstein II. Considered by some to be their greatest flop, “Allegro,” which opened in 1947, is rarely performed today.

But if the show had its flaws, the medical themes it raises are much the same as those I encounter as a physician: Are primary-care doctors more true to their profession than specialists? How bad is it for doctors to try to make a lot of money? And is medicine still a profession that doctors should encourage their children to enter?

Modern doctors — and the general public — will be able to grapple with such questions once again when an Off Broadway revival of “Allegro,” directed by John Doyle, opens on Nov. 19 at the Classic Stage Company’s theater in the East Village. As a physician myself and the son of a physician, it’s a show I would not miss.