# Regenerative Procedure - Hair (Tier 1) with Jonathann Kuo MD

> Preparation Instructions for Your Upcoming Hair Procedure: For the best results, please avoid sun exposure and chemical hair treatments (such as dye, perms, or relaxers) for at least two weeks before your appointment. Wash your scalp thoroughly the day before and avoid alcohol and caffeine. Arrive with clean, dry hair, and do not shave your scalp unless instructed by your provider. After your appointment, avoid touching your scalp, heat or sun exposure, heavy exercise or sweating, and any styling products for at least 48 hours. 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: Jonathann Kuo MD
- Duration: 60 min
- Location: In Person (Organizer Address)
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://extension-health.cal.com/drkuo/regen-hair-tier-1
- Event type id: 4052497

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4052497&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": 4052497,
  "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.