{
  "_comment": "Wear-day rules by device type and payer. Used by coverage_calculator.py. Update when payer LCD policies change.",
  "devices": {
    "dexcom_g6": {
      "display_name": "Dexcom G6",
      "sensor_wear_days": 10,
      "transmitter_wear_days": 90,
      "components": ["sensor", "transmitter"]
    },
    "dexcom_g7": {
      "display_name": "Dexcom G7",
      "sensor_wear_days": 10,
      "components": ["sensor"]
    },
    "freestyle_libre_2": {
      "display_name": "FreeStyle Libre 2",
      "sensor_wear_days": 14,
      "components": ["sensor"]
    },
    "freestyle_libre_3": {
      "display_name": "FreeStyle Libre 3",
      "sensor_wear_days": 14,
      "components": ["sensor"]
    },
    "omnipod_5": {
      "display_name": "Omnipod 5",
      "pod_wear_days": 3,
      "sensor_wear_days": 14,
      "components": ["pod", "sensor"],
      "_note": "Sensor wear days apply to the paired CGM (typically Dexcom G6 or Libre). Pod is 3 days. Track components separately."
    }
  },
  "payer_rules": {
    "medicare": {
      "visit_renewal_days": 180,
      "refill_window_days": 30,
      "_note": "Medicare requires face-to-face physician visit every 6 months for continued CGM coverage. Refill window opens 30 days before coverage end.",
      "covered_devices": [
        "dexcom_g6",
        "dexcom_g7",
        "freestyle_libre_2",
        "freestyle_libre_3"
      ]
    },
    "medicaid": {
      "visit_renewal_days": null,
      "refill_window_days": 30,
      "_note": "Medicaid rules vary by state. Renewal cadence not enforced at this layer — flag for manual review.",
      "covered_devices": []
    },
    "commercial": {
      "visit_renewal_days": null,
      "refill_window_days": 30,
      "_note": "Commercial payer rules vary by plan. Refill window is a conservative default.",
      "covered_devices": []
    },
    "default": {
      "visit_renewal_days": null,
      "refill_window_days": 30,
      "covered_devices": []
    }
  }
}