# Introductory Call with Dan Holmberg, MD

> This is a 20-minute video consultation to meet your Maximus doctor. Please follow these steps to ensure a smooth experience: This is a 20-minute video consultation to meet your Maximus doctor. Please follow these steps to ensure a smooth experience: Access your appointment link through the email from cal.com or by visiting the Maximus webapp at app.maximustribe.com. Arrive five minutes early to check your setup and log into meeting. For assistance or if you encounter any issues, please contact our support team at support@maximustribe.com.

- Host: Dan Holmberg, MD
- Duration: 20 min
- Location: Cal Video
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://maximus-medical-group.cal.com/daniel.holmberg/introductory-call
- Event type id: 3014842

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=3014842&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": 3014842,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "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.