How do I decrypt an encrypted mutator in a JSON output?

What I'm trying to do is encrypt and decrypt data using mutators. The problem I'm having is that I am trying to have my value decrypt on output for a JSON api. The problem is when I output these values in the controller they're still encrypted. I was trying to figure out how to use transform on the collection, but gave up. I'm not sure I can use transform if I intend to paginate the out put as well.

Encryptable.php

<?php

namespace App;

use Illuminate\Support\Facades\Crypt;
trait Encryptable
{
    public function getAttribute($key)
    {
        $value = parent::getAttribute($key);

        if (in_array($key, $this->encryptable)) {
            $value = Crypt::decrypt($value);
            return $value;
        } else {
            return $value;
        }
    }

    public function setAttribute($key, $value)
    {
        if (in_array($key, $this->encryptable)) {
            $value = Crypt::encrypt($value);
        }

        return parent::setAttribute($key, $value);
    }
}

Model

class Patient extends Model
{
    use Encryptable;

    protected $encryptable = [
        'blood_type',
        'medical_conditions',
        'allergies',
        'emergency_contact_id',
    ];
}

Controller

public index(Patient $patient)
{
    return $patient->orderBy('created_at','DESC')->get();
}

Thanks for any help