Billing, Reimbursement, and Insurance Claims
The vocabulary
Patients pay a premium for coverage; a deductible is paid before benefits begin; a copay is a flat amount and coinsurance a percentage; the out-of-pocket maximum caps spending. The formulary lists covered drugs by tier, with lower tiers costing less. Utilization management includes prior authorization, step therapy, quantity limits, and days-supply limits. Claims travel with the NDC, quantity, days supply, and the patient's BIN, PCN, and group number under the NCPDP standard.
The claim lifecycle
Adjudicate, then paid or rejected, then reverse and correct, then resubmit. Read the rejection message before doing anything. Refill-too-soon usually means a days-supply or quantity mismatch or an early fill; PA-required means prior authorization must be obtained; NDC-not-covered points to a formulary or substitution issue; patient-not-covered means eligibility. Never quietly switch a rejected claim to cash without explaining why to the patient.
DAW codes
Dispense-as-written codes tell the plan why a brand was dispensed. DAW 0 means no product selection indicated, DAW 1 means the prescriber required brand medically necessary, and DAW 2 means the patient requested brand. Reimbursement differs by code and some plans reject certain values.
Traps
- Not documenting the reversal when a prescription is returned to stock.
- Routinely waiving copays, which can appear as fraud.
- Assuming a paid claim means the drug was dispensed.
- Confusing copay (flat) with coinsurance (percentage).
Worked example
A claim has an allowed amount of 150 dollars and 20 percent coinsurance with no deductible outstanding. The patient owes 30 dollars and the plan pays 120 dollars.
Rule of thumb: the sig drives the days supply, the days supply drives payment, and every rejection is a message to read-not an obstacle to bypass.