6', 169lb Male with Diastasis Recti. Considering Corrective Surgery and Would Appreciate Advice? (photo)

I am a 6' 169lb man who has what I suspect to be diastasis recti. I am roughly 15% bodyfat and have visible upper abs that appear to be separated by a width of about 5-6cm. While standing at rest with muscles relaxed (as in the side picture) I have an extremely distended midsection. I believe this condition to be hereditary as it has been present since childhood and I have never been overweight. I am considering abdominoplasty and would welcome advice on what kind of improvement I could expect.