As far as I know, you don't have to go to the doctor for lice treatments, but as I've said before, I think it's pretty important that somebody figure out your step-daughter's tummy/bowel issues, and it sounds like her mom may be more concerned about not getting blamed than about solving the problem.(?) All kinds of things can cause frequent diarrhea, but some of them are serious and, if left untreated, can lead to malnutrition and lingering problems.
You don't have to take her to the same doc her mom does (1-1/2 hours away, right?). Here, all of our hospitals have associated walk-in clinics (to keep people with non-emergency symptoms from clogging up the ERs). "MedCheck" is a common one. (I don't know whether that term is nation-wide or local.)
- Places like that are open on weekends.
- They take insurance, if you get her card. If not, some of them will bill you, in which case you put Mom's name and address as the responsible party and they'll send the bill to her. Then she can either get the bill to her insurance company, or blow it off the way she's blown off getting you guys a copy of the insurance card, and the clinic will demand payment from her (which might motivate her to finally get you guys a copy of that card!)
- If your walk-in clinic doesn't bill, their fees are typically less than what private doctors charge, if you don't have insurance - and your husband would still be eligible for reimbursement of that fee by his ex's insurance company.
If Mom will simply tell you guys the name of her insurance company, then your husband is entitled to contact them himself, for a copy of his daughter's card.
My husband's ex lied about providing insurance for my step-son, because claiming that expense increased the amount of child support my husband paid. What tipped him off was her perpetual procrastination about providing a copy of his insurance card and her adamant stance (in spite of our laws) that my husband, as the "non-custodial" parent, wasn't "authorized" to seek any medical care for their son. If that's what's going on in your case, and if mom is letting your step-daughter's stomach issues go untreated because she can't afford medical care, there needs to be some intervention. Maybe Mom (or you guys) would qualify for subsidized healthcare for kids, if that's needed. Maybe you need to get the court involved. But the questions about your step-daughter's health and coverage shouldn't go unanswered indefinitely.