Getting error of intercept term in stepwisefit

I am using stepwisefit to do some Multiple Linear Regressions using 3 input terms:

[b_step3,se_step3,pval_step3,inmodel_step3,stats_step3,nextstep_step3,history_step3] = stepwisefit(Dks,output(:,i),'inmodel',step3_model,'maxiter',0,'display','off')

I see that there is an output of the coefficients (b_step3) and their associated standard errors (se_step3). I also see the intercept term in stats_step3.intercept. However, I'd like to find the standard error associated with the intercept term. I can't seem to track down any examples of this, so any help would be greatly appreciated!