I recently had some blood test done. Creatinine came back as 1.6, BUN is 19, glucose on the high side.....all other measurements are witin the range except for anion gap. Anion gap is 13, slightly above range. What does this all mean?

Hard to say. Without knowing your past medical history and past testing. But from what you mention your testing suggest some element of kidney dysfunction. It's not clear if it's chronic or acute. But you should reach out to your doctor if you have questions too. He/she will know you vest to be able to give you the most accurate description of what's going on.