Ataşehir is a region rich in health institutions in Istanbul and many health institutions offer aesthetic and hair transplant services. Some recommended healthcare organizations might be:

1. Medipol University Medical Faculty Hospital: Medipol University Medical Faculty Hospital provides high-level health services. Hair transplant services are also available at this hospital.
2. Acıbadem Ataşehir Hospital: Acıbadem Ataşehir Hospital provides high-level health services. This hospital also offers aesthetic and hair transplant services.
3. Ataşehir Aesthetic and Plastic Surgery Center: Ataşehir Aesthetic and Plastic Surgery Center offers aesthetic and plastic surgery services. Hair transplant services are also available in this center.
4. Ataşehir Medical Aesthetic Center: Ataşehir Medical Aesthetic Center provides medical aesthetic services. Hair transplant services are also available in this center.
5. Ataşehir Dermatology Center: Ataşehir Dermatology Center provides services related to skin health. Hair transplant services are also available in this center.

For more detailed information, you can get information by calling each organization’s website or phone number.