Creatinine 1.4 no diabetics and no high bp.bun-9 uric acid-4.6 no proteinuria.am i suffering from ckd and what could be the reason?

Likely: You likely do have chronic renal insufficiency. See a nephrologist (kidney specialist) for a complete evaluation.

Here are some ...: Are you a very muscular man? Have your serum creatinine been about at the same level over the past 5 years? If so, you're probably okay with no need to do anything but keep up healthy lifestyle without overindulgence. But low BUN may indicate you may have been on low-protein diet, which is uncommon for a muscular man. Therefore, seek one pro-evaluation and counseling for present & future.