Hadronic vacuum polarization contribution to the spectra of hydrogenic atoms

We consider the calculation of hadronic vacuum polarization effects in the hyperfine splitting and Lamb shift of the muonic hydrogen atom. We use modern experimental data on the cross section of e(+)e(-) annihilation into hadrons. It should be particularly emphasized that hadronic vacuum polarization correction has been the subject of some experimental studies in the case of hyperfine structure of muonium and Lamb shift in muonic hydrogen. (Author)