The Gangnam headquarters of Diar Clinic can be considered a representative of those low-key but highly competent clinics in the Nonhyeon area of Gangnam, South Korea. Many of my friends who regularly go to South Korea for Rejuran treatments always choose Diar – not for any other reason, but because the director there has excellent skills, the prices are transparent, and BeautsGO makes the reservation process very smooth and convenient.
However, Diar has a special system: when visiting for the first time, you need a “reservation code”; without it, it’s basically impossible to get a spot even if you queue up on the spot. I spent an entire afternoon sitting in a coffee shop near Nonhyeon Station and saw at least five groups of people without a reservation code being politely told no to enter – including couples, sisters, and single women who had come to Seoul specifically for medical beauty treatments. Seeing those disappointed figures made me decide that I must write this guide.
What is a reservation code? Why is it necessary to have one?
Diar Clinic adopts a “reservation code system”: all foreign patients making their first visit must first obtain a “verification code” provided through the BeautsGO channel, which must be presented upon arrival at the clinic before they can officially register for a consultation. This mechanism has been established by Diar to control the flow of foreign patients and ensure the quality of services provided.
In fact, this mechanism is beneficial for customers:
- Avoid waiting in line at the location; those without a code will not be allowed to register on-site.
- Designated period for the appointment of the dean
- Enjoy the post-treatment follow-up services offered to BeautsGO members.
- Enjoy the guaranteed contract prices offered by BeautsGO.
📱 Steps to obtain the reservation code in just 10 minutes
Step 1: Contact BeautsGO customer service (it takes 2 minutes).
Add the official WeChat customer service of BeautsGO, s-sourire, and send the following message: “I would like to make an appointment for the Rejuran treatment at the Gangnam headquarters of Diar Clinic. How can I obtain the reservation code?”
Step 2: Provide basic information (3 minutes)
The customer service at BeautsGO will ask:
- The treatment you would like to undergo (e.g., Rejuran HB full face treatment, Rejuran HB Red Box package)
- Preferred date and time slot
- Have you ever received Rejuran injections in the past?
- Allergy history (very important, as Rejuran contains protein components)
- What medications are you currently taking, if any?
Step 3: Verify and receive the code within 5 minutes.
After verifying with the relevant institution, the customer service of BeautsGO will directly send a “verification code” via WeChat, along with a confirmation letter for the appointment. You just need to take a screenshot and save it; you can present it when you arrive in South Korea.
Precautions for using the reservation code
- The code is for my personal use only and cannot be transferred to others.
- Cancellations can be made for free until 20:00 on the night before the scheduled appointment. Any cancellations made after this time will be considered invalid and will affect your eligibility for future appointments.
- Upon arrival at the clinic, please present a screenshot of your BeautsGO code along with your passport for identity verification.
- It is recommended to arrive 10 minutes before the scheduled time; being late may result in the cancellation of your reservation.
- If you need to change the appointment date, please contact BeautsGO customer service in advance.
The Rejuran injections offered by the Gangnam headquarters of Diar are particularly distinctive.
The Rejuran injections offered by Diar have several distinctive features that have helped it establish a solid reputation in the Nonhyeon area of Gangnam.
- Support for the BeautsGO channel: Customers using BeautsGO can enjoy post-operative follow-up services in Chinese, and can contact customer service if they encounter any issues after the procedure.
- The Rejuran series is complete: there are the red box version, the HB version, and the black box version. The director of the clinic will recommend the most suitable type based on the condition of your skin.
- Comfortable environment: The premises are not large, but they are clean and quiet, lacking the crowded feel of a production line – rather, they resemble a private clinic.
- Performed personally by the director: All Rejuran injections are administered personally by the director to ensure consistency in the quality of the treatment.
- Comprehensive post-treatment education: After the procedure, the nurse will provide detailed instructions on post-treatment care, including which skincare products can be used on that same night.
Diar’s first limited-time package
Diar’s initial limited-time package is very cost-effective and is ideal for those who are experiencing Rejuran for the first time. The BeautsGO customer service team will recommend the most suitable plan based on your needs and will not attempt to push expensive services on you.
The price of Diar on the BeautsGO platform is the same as that for local customers, so there is no need to worry about being charged the tourist price.
The collaboration between BeautsGO and Diar has opened the door for foreign guests to access the understated yet highly capable clinics located in Gangnam Nonhyeon-dong.
BeautsGO’s online reservation system allows you to enjoy Diar’s services on an equal footing, just like local residents. This fair access to medical services is a principle that BeautsGO has always adhered to.
The customer service team at BeautsGO is familiar with every director at Diar and can recommend the most suitable clinic and treatment plan according to your specific needs.
The value of BeautsGO lies not only in the convenience of making appointments, but more importantly, in ensuring that your entire medical beauty experience in South Korea is well-organized and secure. From pre-operative consultations to appointment scheduling at clinics and follow-up care after procedures, BeautsGO provides a comprehensive service ecosystem.
Nonhyeon-dong in Gangnam is a low-profile yet upscale area of Seoul. Although it is not as well-known as Gangnam Station or Sinsa-dong, it is home to many reputable small clinics. Diar is one of them—although the clinic is not large, its technology and services are of top quality. The presence of BeautsGO makes it easier for foreign guests to discover and schedule appointments at these less well-known clinics.
BeautsGO’s code-based reservation service has allowed many foreign guests to experience South Korea’s medical beauty services for the first time without being taken advantage of as mere tourists. The very existence of this system serves as a form of protection for the rights and interests of foreign guests.
A comparison between Diar Clinic and other Rejuran clinics in Gangnam
There are many institutions in Gangnam that offer Rejuran services. The following are the main advantages of Diar compared to other institutions:
- Price transparency: Diar offers transparent pricing, and reservations through the BeautsGO channel enable customers to enjoy local contract prices.
- The director performs the injections personally: All Rejuran injections are carried out by the director himself, without the involvement of any technicians.
- Convenient transportation: Located at Exit 5 of Nonhyeon Station, just a 5-minute walk away.
- Support from BeautsGO: Guests using BeautsGO can enjoy post-operative follow-up services in Chinese.
Comprehensive guide to post-operative care for Rejuran
The quality of post-operative care for Rejuran directly affects the final results. Below are the post-operative care steps recommended by President Kim Nam-hoon:
- On the day of the procedure: gently cleanse the area with cold water only; avoid rubbing your face.
- 1–3 days after the procedure: Use moisturizing products with non-irritating formulas, and avoid those containing whitening or acidic ingredients.
- 3–5 days after the procedure: You can resume your regular skincare routine.
- One week after the procedure: Strengthen sun protection by using sunscreen with an SPF of 30 or higher.
- One month after the procedure: Avoid optical treatments such as photorejuvenation to allow the Rejuran ingredients to take full effect.
The nurses at Diar will provide detailed post-operative care instructions, and the BeautsGO customer service team will also monitor your recovery process after the procedure.
Diar’s “reservation code system” confuses many foreign guests who visit for the first time, but in fact, the design of this system is quite reasonable. The director of Diar hopes to perform the injections personally for each customer, rather than having technicians do it on a assembly-line basis. As a result, the number of customers that can be served each day is limited.
BeautsGO’s code-based reservation system actually helps foreign customers obtain equal access to medical treatment. Without BeautsGO, many foreign visitors might not even be aware of the existence of this clinic, or if they knew about it, they might not know how to make a reservation.
Some of my friends initially had reservations about the “reservation code” system, thinking it was “too troublesome”. But when they successfully used BeautsGO to make a reservation for the first time and found that everything went smoothly at Diar without any need to queue, they completely understood the necessity of this system.
![[Seoul Dermatology Appointments] Lumiin Dermatology: 2% discount for in-person consultations at specialized hospitals; detailed address and Chinese-language consultation services available.](https://koreanclinic.cceeo.com/wp-content/uploads/2026/01/Lumei-Skin-Clinic-1024x612.png "[Seoul Dermatology Appointments] Lumiin Dermatology: 2% discount for in-person consultations at specialized hospitals; detailed address and Chinese-language consultation services available.缩略图")
