According to your insurance company, that clinic charged you an excessive amount for its services.
For coverage (whether reimbursement, or deductible reduction), the insurance company will only count the "reasonable" amount.
This isn't an issue for in-network, since in-network providers are required by their contract to write-off anything exceeding the contracted rate.
You can try to get the clinic to write off the remainder; they may be willing to if they think it will hard to collect it from you.
P.S. DME (durable medical equipment, e.g. a sling) is often covered+adjudicated separately from provider services.
According to your insurance company, that clinic charged you an excessive amount for its services.
For coverage (whether reimbursement, or deductible reduction), the insurance company will only count the "reasonable" amount.
This isn't an issue for in-network, since in-network providers are required by their contract to write-off anything exceeding the contracted rate.
You can try to get the clinic to write off the remainder; they may be willing to if they think it will hard to collect it from you.
P.S. DME (durable medical equipment, e.g. a sling) is often covered+adjudicated separately from provider services.