Medical Assistance Mental Health Copay Write off?

Good Afternoon everyone! I've been getting the run around, so I'm hoping someone has some advice.

I bill for a mental health facility in Minnesota. While looking online at our MN DHS website, I found a few different documents staying there are no copays for mental health visits. 

I contacted the state, and the rep I talked with said that we are supposed to write off copays and deductibles for patients with MA or a PMAP. Spend downs not included. 

This has put a lot of discussion into our office lately. 

Has anyone heard of this? These patients' claims are being sent and coming back with a Patient Responsiblility, so I would assume that if they had no copay, they wouldn't use a PR reasoning code.

Any info is appreciated! 

Thank you!