Directory of U.S. Physician Assistants (PA)
- William Ruml, PA
- William Russell, PA
- William Rutland, PA
- William Ryan, PA
- William Sanford, PA
- William Sarniguet Jerez, PA
- William Schaefer, PA
- William Schafer, PA
- William Schalck, PA
- William Schelar, PA
- William Schlegel, PA
- William Schmidt, PA
- William Schmitz, PA
- William Schnell, PA
- William Schropp, PA
- William Schultz, PA
- William Scudder, PA
- William Seibt, PA
- William Seidl, PA
- William Sellars, PA
- William Sellers, PA
- William Shafnacker, PA
- William Shafto, PA
- William Sharp, PA
- William Shaw, PA
- William Shea, PA
- William Sheaffer, PA
- William Shelby, PA
- William Shell, PA
- William Sheppard, PA
- William Sherman, PA
- William Shilkitus, PA
- William Shipman, PA
- William Shonts, PA
- William Short, PA
- William Short, PA
- William Shough, PA
- William Shughart, PA
- William Sideras, PA
- William Sierra, PA
- William Signorini, PA
- William Simister, PA
- William Simon, PA
- William Simon, PA
- William Simpson, PA
- William Simpson, PA
- William Sims, PA
- William Singleton, PA
- William Singleton, PA
- William Sisitki, PA