Reimbursement Calculator

Push data into the calculator at runtime (postMessage)

Domain must be whitelisted. Inbound messages whose event.origin hostname is not on the admin allowlist are silently dropped — no error, no state change.

After the calculator is loaded (in an iframe or opened window), your app can send messages to drive it. The calculator only accepts messages whose event.origin hostname is on the allowlist.

Every inbound message must be an object with target: "rpm-rtm-ccm-calculator" and an action:

Push example:

// From your app (iframe is embedded on a page on your app origin):
var iframe = document.getElementById('rrc-iframe');
iframe.contentWindow.postMessage({
  target: 'rpm-rtm-ccm-calculator',
  action: 'setCounts',
  counts: { '99454': 120, '99457': 80, '99458': 30 }
}, 'https://your-wp-site.com');

Receive billing data from the calculator (postMessage)

Domain must be whitelisted. The outbound targetOrigin is strictly https://<activeDomain> where activeDomain is an entry from the admin allowlist. If your app's host isn't on the list, no message is ever dispatched to your window — your listener will never fire.

Every time the user edits inputs, the calculator emits a message to window.opener and window.parent using a strict targetOrigin of https://<activeDomain> (the allowlisted app host from the request or postMessage). Listen for it in your app:

window.addEventListener('message', function (event) {
  if (event.origin !== 'https://your-wp-site.com') return;
  var res = event.data;
  if (!res || !res.data || res.data.source !== 'rpm-rtm-ccm-calculator') return;
  if (res.resFlag !== true) {
    console.warn('Calculator error', res.msg);
    return;
  }
  // res.data is an object with meta + nested .data[] programs.
  console.log('event:', res.data.event, 'summary:', res.data.summary);
  res.data.data.forEach(function (program) {
    console.log(program.program, program.totalAmount, program.perPatientProjection);
  });
});

Response envelope (v1.4.0+) — the top level is strictly {statusCode, resFlag, type, msg, data}. All meta and the program array live inside data:

{
  "statusCode": 200,
  "resFlag": true,
  "type": "I",
  "msg": "calculator billing data returned successfully.",
  "data": {
    "source": "rpm-rtm-ccm-calculator",
    "event": "update",
    "currency": "$",
    "timestamp": "2026-04-24T12:34:56.789Z",
    "activeDomain": "app.example.com",
    "summary": {
      "totalClaims": 250,
      "totalAmount": 12345.67,
      "monthlyRevenue": 5000.00,
      "annualRevenue": 60000.00,
      "perPatientPerMonth": 100.00,
      "patients": 50
    },
    "data": [
      {
        "program": "RPM",
        "label": "Remote Patient Monitoring (RPM)",
        "codes": [
          { "code": "99453", "description": "RPM device set up", "rate": 19.32, "count": 0, "subtotal": 0.00 },
          { "code": "99454", "description": "Monthly review of RPM data (16+ days / 30)", "rate": 43.02, "count": 120, "subtotal": 5162.40 }
        ],
        "totalClaims": 120,
        "totalAmount": 5162.40,
        "perPatientProjection": {
          "intensity": "typical",
          "track": "standard",
          "patients": 50,
          "monthlyRevenue": 2500.00,
          "annualRevenue": 30000.00,
          "perPatientPerMonth": 50.00
        }
      },
      { "program": "RTM", "label": "Remote Therapeutic Monitoring (RTM)", "codes": [ /* ... */ ], "totalClaims": 0, "totalAmount": 0, "perPatientProjection": { /* ... */ } },
      { "program": "CCM", "label": "Chronic / Principal Care Management (CCM / PCM / BHI)", "codes": [ /* ... */ ], "totalClaims": 0, "totalAmount": 0, "perPatientProjection": { /* ... */ } }
    ]
  }
}

• statusCode — HTTP-style code. 200 on success, 400 on validation error.
• resFlag — true if the payload is usable, false otherwise.
• type — "I" info / success, "E" error.
• msg — human-readable status string.
• data.source — always "rpm-rtm-ccm-calculator". Use this in your listener to filter out unrelated messages.
• data.event — "ready" (initial emit on load), "update" (user edit), "pong" (reply to ping), or "error" (inbound action failed).
• data.currency — currency symbol the calculator was rendered with.
• data.timestamp — ISO-8601 UTC timestamp.
• data.activeDomain — the approved host the calculator is talking to, or null.
• data.summary — cross-program totals.
• data.data[] — always three entries in order: RPM, RTM, CCM. Programs your shortcode filtered out still appear with zero totals and empty codes.

Full working examples

Iframe embed + bi-directional messaging

<iframe id="rrc" width="100%" height="900"
        src="https://your-wp-site.com/calculator/?rrc_readonly=1&rrc_view=code"></iframe>

<script>
  var WP_ORIGIN = 'https://your-wp-site.com';
  var iframe    = document.getElementById('rrc');

  // Receive live totals.
  window.addEventListener('message', function (e) {
    if (e.origin !== WP_ORIGIN) return;
    var res = e.data;
    if (!res || !res.data || res.data.source !== 'rpm-rtm-ccm-calculator') return;
    document.getElementById('total').textContent = '$' + res.data.summary.totalAmount.toFixed(2);
  });

  // Push initial counts as soon as the iframe is ready.
  iframe.addEventListener('load', function () {
    iframe.contentWindow.postMessage({
      target: 'rpm-rtm-ccm-calculator',
      action: 'setCounts',
      counts: { '99454': 120, '99457': 80 }
    }, WP_ORIGIN);
  });
</script>

Pop-up window + deep-link

var url = 'https://your-wp-site.com/calculator/' +
          '?rrc_view=patient' +
          '&rrc_achieved=99454:120,99457:80,99458:30';
var pop = window.open(url, 'rrc', 'width=1000,height=900');

window.addEventListener('message', function (e) {
  if (e.origin !== 'https://your-wp-site.com') return;
  var res = e.data;
  if (!res || !res.data || res.data.source !== 'rpm-rtm-ccm-calculator') return;
  console.log('event:', res.data.event, 'summary:', res.data.summary);
  res.data.data.forEach(function (p) {
    console.log(p.program, p.totalAmount);
  });
});

Live response preview

This box shows the exact JSON payload the calculator is currently emitting. Edit the Per-Code or Per-Patient tabs and watch it update live.

{}

Tip: if the data.activeDomain field above is null, the page load had no allowlisted Origin/Referer (or cache hid it) and the parent has not yet sent a postMessage. Add your app’s hostname to WP Admin → RPM / RTM / CCM Calc → Approved domains and open the calculator from that app, or have your parent send {target:"rpm-rtm-ccm-calculator",action:"ping"} from an allowlisted origin.