The state SOL requirements are not a factor as medical accounts are considered "services" and are under the standard UCC 4 year SOL.
Send the medical dispute letter (search Google for "Why Chat letters") on any accounts that are on your reports, if the accounts are completely verified by the OC through the reporting CA to the CRA, PAY THEM!! (of course with the HIPAA letter directly to the OC)
The only time you need be concerned about SOL on medical debts is if you are being sued on a medical debt that you have no other defense on, i.e. "it's not yours, it was paid by insurance, or should have been paid by insurance if it had been properly billed, it was an inflated bill that you had disputed etc."
If you are being sued on a large medical bill, particularly from a Hospital, there is likely no "useable" SOL defense, (if that is your only defense), as unpaid medical bills from Hospitals are paid, (reimbursed) by the State from taxpayer funds and the Courts have held that it is an indirect "Governmental" obligation.