The calcium is very normal, the D is quite low and the 24h U calcium is normal. Hard to know if this is primary or secondary, but the kidney stones are concerning. Sometimes we give some vitamin D replacment (1000IU-2000IU/day) and follow the levels closely to sort this out. Or repeating the PTH/Ca levels every few months for a while to see if a trend or diagnosis becomes more apparent. I have seen several cases like this that end up being primary hyperpara, but would need to see more data over time to make this conclusion.
As backgroung info, I am a 35 yr old female with no known family history of kidney stones.