| 2009 | | Rank | Provinces | Out-patients | 1 | Ranong | 490,645 | 2 | Kalasin | 506,497 | 3 | Amnat Charoen | 665,560 | 4 | Mae Hong Son | 700,123 | 5 | Pangnga | 701,510 | 6 | Satun | 711,835 | 7 | Nakhon Phanom | 716,129 | 8 | Trat | 756,780 | 9 | Samut Songkhram | 768,009 | 10 | Nakhon Nayok | 775,702 | | Whole Kingdom | 152,428,645 |
| | 2010 | | Rank | Provinces | Out-patients | 1 | Ranong | 433,618 | 2 | Satun | 641,596 | 3 | Mae Hong Son | 742,464 | 4 | Amnat Charoen | 755,173 | 5 | Trat | 779,266 | 6 | Pangnga | 783,612 | 7 | Nakhon Nayok | 806,745 | 8 | Sing Buri | 814,494 | 9 | Mukdahan | 827,667 | 10 | Yala | 895,991 | | Whole Kingdom | 164,766,694 |
| | 2011 | | Rank | Provinces | Out-patients | 1 | Ranong | 479,748 | 2 | Nakhon Nayok | 581,408 | 3 | Amnat Charoen | 738,588 | 4 | Trat | 778,908 | 5 | Mae Hong Son | 814,306 | 6 | Pangnga | 875,113 | 7 | Satun | 894,146 | 8 | Sing Buri | 937,680 | 9 | Phuket | 938,941 | 10 | Bueng Kan | 949,228 | | Whole Kingdom | 170,790,297 |
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