Calprotectin Level Accurate ?

I now have access through a patient portal for that Hospital system.
Apparently my Calprotectin was checked while at the Hospital.
A year ago it was 522.
This recent test result says only 176.
The Hospital sends the sample to the same Sonora Quest Laboratory system I use for my regular, blood, stool or urine tests.
176 is the lowest it’s been in 5 years !!