  In this paper, we study the interior C^{1,1} regularity of viscosity
solutions for a degenerate Monge-Amp\`{e}re type equation \det[D^{2}u-A(x, u,
Du)]=B(x, u, Du) when B \geq 0 and B^{\frac{1}{n-1}}\in
C^{1,1}(\bar{\Omega}\times\mathbb{R}\times \mathbb{R}^n). We prove that u\in
C^{1,1}(\Omega) under the A3 condition and A3w^+ condition respectively. In the
former case, we construct a suitable auxiliary function to obtain uniform {\it
a priori} estimates directly. In the latter case, the main argument is to
establish the Pogorelov type estimates, which are interesting independently.
