has participant hydron NAD(1-) NADH(2-) NADH dehydrogenase activity NADH:(acceptor) oxidoreductase activity diphosphopyridine diaphorase activity beta-NADH dehydrogenase dinucleotide activity NADH-menadione oxidoreductase activity reduced diphosphopyridine nucleotide diaphorase activity diaphorase activity NADH:cytochrome c oxidoreductase activity diphosphopyrinase activity NADH2 dehydrogenase activity molecular_function type 1 dehydrogenase activity NADH oxidoreductase activity dihydronicotinamide adenine dinucleotide dehydrogenase activity GO:0003954 type I dehydrogenase activity NADH hydrogenase activity DPNH diaphorase activity NADH diaphorase activity NADH:acceptor oxidoreductase activity dihydrocodehydrogenase I dehydrogenase activity Catalysis of the reaction: NADH + H+ + acceptor = NAD+ + reduced acceptor. cytochrome c reductase activity RHEA:11356 oxidoreductase activity, acting on NAD(P)H