  A light CP-even Higgs boson (h) with a mass of about 10 GeV could explain the
recent BNL measurement of the muon anomalous magnetic moment, in the framework
of a general CP-conserving two-Higgs-doublet extension of the Standard Model
with no tree-level flavor-changing neutral Higgs couplings. However, the
allowed Higgs mass window is quite small and the corresponding model parameters
are very constrained. The Higgs sector can contribute significantly to the
observed BNL result for g-2 without violating known experimental constraints
only if the hZZ coupling (approximately) vanishes and m_h lies between the
Upsilon mass and 2m_B.
