No, I haven't tried to figure that out. I don't know if it would even be possible. So I am just assuming I'll be spending similar to what I do now.
The only health problems I have ever had are colds, which I don't even bother going to a doctor for...
For years, I rarely went to my doctor. I would go for an annual checkup every other year, just so that the doctor's office keeps my file and not puts it into storage, or throws it away. I once passed a huge kidney stone myself with no help (photo of stone posted here a few years ago), and no pain medicine. BMI never higher than 25. BP a bit higher than I'd like, but doctor said was fine for someone of my age (57). My blood work, urine test, blah blah blah, the doctor said it was the best he had seen in a while. Never had to take any daily medicine.
Then, 6 months ago, I was diagnosed with a serious illness. The treatment is still on going. Now, I understand why my medical insurance premium is so high, even though my policy has a $10K annual deductible. That $10K out-of-pocket expense, I went through in just a couple of weeks.
Just so younger people know...
PS. Last year, my 23-yr old son, who was still under our policy then, came down with a rare form of internal bacteria infection that could easily cost him his life. He had not been to a doctor since he was 12, and that was just a check up as an introduction. The 3rd time he went to the ER was when they finally obtained the correct diagnosis. Result: 9 days in the hospital, multiple CAT scans, the right cocktail of antibiotics, some minor surgeries, home treatment and home visits by a nurse for follow-ups. Yes, we also went over that $10K deductible in no time at all.
Several infectious-disease specialists scratched their head, and never could explain why he was infected. It just happened. Thanks goodness they found a drug that killed the bug before it killed my son.
The point is that health care cost is the most significant unknown for an early retiree. It's something that I was never concerned with, as a healthy individual and a worker covered by insurance provided by the employer.