The D7200’s regular phase detection autofocus system is fast and efficient, but it relies in precise alignment between the lens’s optical components, the position of the AF sensor and the position of the sensor plane itself. Any slight mis-alignment will lead to focusing errors which may not be obvious in everyday photography but may become apparent in close-ups or pictures taken with very wide lens apertures and hence very shallow depth of field.
The D7200 does have an AF fine-tune option on the Setup menu for applying manual corrections for specific lenses, but this is a pretty technical approach to a problem that may have a simpler solution.
If you switch to live view instead, the D7200 will switch to a slower contrast detection autofocus system which bypasses the regular AF sensor and uses the image formed on the main sensor itself. It’s not as quick, but it is by definition 100% accurate because the imaging sensor itself is doing the focusing.
This works particularly well for manual focusing, because if you use the zoom button on the back of the camera, the live view is magnified and you can adjust the focus with immense precision.