Healthcare billing decision guides are flowcharts that walk a billing operator from a starting question to the right next action (appeal, resubmit, escalate, or close) using payer-specific rules and CARC code patterns.

• ·Each guide starts from a single question and branches by CARC code, deadline, or payer behavior.
• ·Decision paths reference appeal templates, modifier rules, and prior auth requirements where relevant.
• ·Guides cover four operational categories: denial, modifier selection, prior auth, and triage.
• ·All guides are free, ungated, and updated when payer policy changes.