<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h1 class="text-center">Médicos</h1>
</div>
<div class="modal-body">
<div class="form-group">
<input type="text" class="form-control input-lg" placeholder="CRM/CPF"/>
</div>
<div class="form-group">
<input type="submit" class="btn btn-block btn-lg btn-primary" value="Próximo"/>
<span class="pull-right"><a href="#">Registrar-se</a></span><span><a href="#">Alterar Senha</a></span>
</div>
</div>
</div>
</div>