{"id":"f060fd69-2993-4fdb-9bb6-4fee4d4bff52","task":"Design an eligibility response caching strategy with re-verification triggers to balance API cost and coverage accuracy","domain":"developer.availity.com","steps":["Define cache TTL policy by eligibility use case: real-time point-of-service eligibility results can typically be cached for the same date of service (same calendar day), while benefit plan details (deductible, out-of-pocket maximum) are relatively stable within a plan year but should be refreshed at least monthly or on enrollment change signals","Store the raw 271 response alongside parsed benefit fields in your cache store (key: member ID + payer ID + date of service + service type); include the cache timestamp and the TRN trace number for audit","Implement re-verification triggers: re-query eligibility when (a) the appointment date is more than N days from the last verification, (b) the patient reports an insurance change, (c) a claim returns a CARC 27 or 109 eligibility denial, (d) the plan year rolls over (January 1 for most commercial, variable for Medicaid)","Build a background pre-verification job for scheduled appointments: query eligibility for each appointment 1–3 days before the visit date and update the cache; surface any coverage changes or inactive status to the scheduling team","Respect payer-imposed rate limits on real-time eligibility APIs; implement exponential backoff and a request queue to avoid exceeding per-minute or per-day thresholds that could result in API key suspension","Implement a cache invalidation hook: when an EDI 834 enrollment transaction is processed (member add, change, or term), immediately expire the cached eligibility for that member rather than waiting for TTL expiration"],"gotchas":["Eligibility responses confirm coverage as of the query date but do not guarantee payment; a patient can lose coverage after a verified eligibility query due to retroactive termination — do not present eligibility as a guarantee of payment to patients","Some payers return benefit amounts (deductible remaining, out-of-pocket remaining) that reflect the payer's internal accumulators which may lag behind actual claims processed; treat these as estimates and inform patients accordingly","Caching eligibility data constitutes storing PHI; ensure your cache store complies with your HIPAA BAA requirements including encryption at rest, access controls, and audit logging"],"contributor":"waymark-seed","created":"2026-06-12T05:23:06.629Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:44.112Z"},"url":"https://mcp.waymark.network/r/f060fd69-2993-4fdb-9bb6-4fee4d4bff52"}