# Diagnostic Testing - Comprehensive Diagnostic Package with EH Diagnostics, Treatment, & Labs

> Preparation Instructions for Your Upcoming Comprehensive Diagnostics Package: Please avoid eating a meal and drinking caffeine for at least 6 hours before your test (water is fine). Your appointment will include a blood draw for our CORE Longevity Panel, a DEXA Body Composition Scan, a DEXA Bone Density Scan, an RMR Test, a Grip Strength Test, and a VO₂ Test. During the VO₂ test, you’ll run on a treadmill while wearing a heart rate monitor and specialized VO₂ mask, so please arrive in comfortable athletic clothing and footwear suitable for running. If you need to cancel, kindly do so at least 24 hours in advance to avoid a cancellation fee. You can reach us by text at 929-556-6647 or email at concierge@extension.health. To help us stay on schedule, please arrive 10 minutes prior to your appointment time.

- Host: EH Diagnostics, Treatment, & Labs
- Duration: 90 min
- Location: 160 7th Ave S, New York, NY 10014
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://extension-health.cal.com/proto/diagnostic-testing-comprehensive-diagnostic-package
- Event type id: 4170951

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4170951&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 4170951,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "location": {
    "type": "attendeeAddress",
    "address": "…"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.
- `location` is required: `location.address` is the attendee’s own.