| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | — / 5 | Incheon, Republic of Korea | 76+ years | — | Allergic rhinitis and related sinus conditions | KOIHA-accredited hospital with an otorhinolaryngology department specializing in rhinitis. FESS available. Lead ENT doctor fellowship-trained at top US institutions. | Advanced Regenerative Medicine Implementation Institution (Ministry of Health and Welfare, Republic of Korea), Korean Institute for Healthcare Accreditation |