| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 5.0 / 5 | Sofia, Bulgaria | 10+ years | Thyroid function tests (including T3, T4, TSH) | — | — | ISO 9001:2015 Quality management systems | ||
| #2 | 4.3 / 5 | Sofia, Bulgaria | — | — | Thyroid function tests (including T3, T4, TSH) | — | — | — | |
| #3 | — / 5 (5) | Sofia, Bulgaria | — | — | Thyroid function tests (including T3, T4, TSH) | — | — | ISO 9001:2015 Quality management systems |