Cant get a clear answer so im curious, if we apply for financial assistance will it affect my deductible and/or max out of pocket

I am pregnant, so i got a few genetic tests done, i was given the wrong test code so expected the total cost of the 2 tests to be around $750 after insurance. The actual codes came out to a little over $1,500 after insurance. The one test was $650 (expected) but the other test was $860 when i was given the wrong test code so the quote from insurance i got was $100 so huge price difference.

My deductible is $1,500 and MOOP is $5,000. So with the tests i reached my deductible and a good chunk of MOOP (with copays and other tests, ive paid about $2,000 towards MOOP) But with the cost being more than expected we are applying for financial assistance which would bring the costs of the 2 tests down from over $1,500 to around $550. Apart those 2 tests the only thing that have gone towards my deductible has been a blood test of around $100.

The company said that it shouldnt affect the fact ive reached my deductible but will only reduce what ive paid towards my MOOP, but i cant find anything that supports that. Anyone have any answers as to whether applying for financial assistance after using insurance how it will influence my deductible and MOOP?