Is it ok to have a tummy tuck if you have a hiatal hernia and peptic ulcer?

If both of these conditions are being controlled with medication prescribed by your PCP or gastroenterologist, you should be able to receive clearance for a TT.  Otherwise, see a general surgeon to address these problems prior to scheduling a TT.Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA

It really depends on how much of the abdominal wall laxity you and have and how big your hiatal hernia is. Most of them are small and do not require treatment, but some do. You should get clearance from your doctor, who in turn may refer you to a general surgeon for such clearance. If you do not have a lot of abdominal wall laxity, odds are your condition will not be exacerbated by abdominoplasty. Peptic ulcer disease is not affected by abdominoplasty, but may require medical therapy and possibly an endoscopy as a separate procedure.

A tummy tuck tightens
the abdominal wall, including the fascia, which increases your abdominal
pressure.  This will make your hiatal
hernia worse and may cause more problems. 
I would not recommend a tummy tuck until the hiatal hernia and peptic
ulcer have been treated.  Warmest Regards,Gary Horndeski, M.D.

It will be tough for anybody to predict the effect the tummy tuck will have on your repaired hiatal hernia, but if you've had good control of reflux and acid and have a normal endoscopy, the tummy tuck procedure could be modified so these things won't get worse.

Yes, you should be able to have a TT with a peptic ulcer and hiatal hernia. The TT is unrelated. Tightening the rectus muscle can increase your reflux, however. Your peptic ulcer should be controlled as well. A consultation with a board certified PS would be in order as well as an approval to proceed by your internist.
Thank you for your quesstion, and good luck.