The odds that you’ve seen a doctor in the last year vary quite a bit depending on where you live — but so far, the way your state has implemented the Affordable Care Act doesn’t seem to have much to do with it, government data show.

A new report from the Centers for Disease Control and Prevention finds that 17.3 percent of American adults did not have a home base for their medical care in 2014, and 34 percent had not seen or talked to a doctor in the last year.

But those figures ranged considerably from state to state.

Residents of Vermont had the best access to medical care: 84.1 percent of them had visited or been in touch with a doctor in the past year, and 97.2 percent said they had a place to go if they needed medical attention.

In four other states — Delaware, Massachusetts, Wisconsin and Hawaii — at least 90 percent of residents had a medical home, and in two other states — Delaware and Virginia — at least 75 percent of residents had seen or talked with a doctor in the past year.

At the other end of the spectrum, in three states — Nevada, Idaho and Texas — more than 25 percent of residents didn’t have a regular place to receive medical care. In three other states — Montana, South Dakota and Alaska — more than 45 percent of people had gone more than a year without seeing or talking to a doctor.

Although access to medical care varied greatly by state, the researchers found little difference when they grouped states according to their response to the ACA (also known as Obamacare).

Among the 25 states (plus the District of Columbia) that expanded their Medicaid programs in the wake of the federal law, 66.7 percent of residents had seen or spoken with a doctor in the last year, on average. In the other 25 states that did not expand Medicare, the figure was 65.2 percent — a difference too small to be considered statistically significant.

The researchers did find a slight but real difference in residents’ likelihood of having a usual place of care: 83.4 percent had a medical home in states that expanded Medicare, on average, compared with 81.8 percent in states that didn’t.

“Many factors likely influence rates of healthcare utilization, and rates may change as the length of time since ACA implementation increases,” the report authors concluded.

The findings are based on adults ages 18 to 64 who participated in the CDC’s National Health Interview Survey. The report was produced by the agency’s National Center for Health Statistics.

——

©2016 Los Angeles Times