| Rank | State | Copayment (2006) | Copayment (2016) | Rate of Growth |
|---|---|---|---|---|
| 1 | New Mexico | $22.00 | $47.32 | 7.96% |
| 2 | Arkansas | $23.00 | $42.45 | 6.32% |
| 3 | Louisiana | $23.00 | $42.10 | 6.23% |
| 4 | Alaska | $22.00 | $41.91 | 6.66% |
| 5 | Georgia | $22.00 | $41.59 | 6.58% |
| 6 | Montana | $23.00 | $37.55 | 5.02% |
| 7 | Oklahoma | $22.00 | $36.84 | 5.29% |
| 8 | Colorado | $22.00 | $36.84 | 5.29% |
| 9 | Nebraska | $21.00 | $36.18 | 5.59% |
| 10 | Connecticut | $20.00 | $35.56 | 5.92% |
| 11 | New Jersey | $20.00 | $35.56 | 5.92% |
| 12 | Kansas | $20.00 | $35.56 | 5.92% |
| 13 | Utah | $20.00 | $35.56 | 5.92% |
| 14 | Oregon | $19.00 | $34.99 | 6.30% |
| 15 | Massachusetts | $17.00 | $34.12 | 7.21% |
| 16 | Mississippi | $23.00 | $33.70 | 3.90% |
| 17 | South Carolina | $21.00 | $32.05 | 4.32% |
| 18 | North Carolina | $21.00 | $32.05 | 4.32% |
| 19 | Texas | $21.00 | $32.05 | 4.32% |
| 20 | Tennessee | $21.00 | $32.05 | 4.32% |
| 21 | Wisconsin | $20.00 | $31.25 | 4.56% |
| 22 | Minnesota | $20.00 | $31.25 | 4.56% |
| 23 | Illinois | $20.00 | $31.25 | 4.56% |
| 24 | Indiana | $20.00 | $31.25 | 4.56% |
| 25 | Kentucky | $20.00 | $31.25 | 4.56% |
| 26 | North Dakota | $21.00 | $30.87 | 3.93% |
| 27 | South Dakota | $21.00 | $30.87 | 3.93% |
| 28 | Virginia | $19.00 | $30.48 | 4.84% |
| 29 | Iowa | $19.00 | $30.48 | 4.84% |
| 30 | Ohio | $19.00 | $30.48 | 4.84% |
| 31 | Arizona | $19.00 | $30.48 | 4.84% |
| 32 | New York | $19.00 | $30.48 | 4.84% |
| 33 | Maryland | $18.00 | $29.76 | 5.15% |
| 34 | Vermont | $19.00 | $29.20 | 4.39% |
| 35 | Pennsylvania | $17.00 | $29.07 | 5.51% |
| 36 | Alabama | $23.00 | $27.59 | 1.84% |
| 37 | Hawaii | $14.00 | $27.44 | 6.96% |
| 38 | Washington | $19.00 | $26.79 | 3.50% |
| 39 | Missouri | $19.00 | $26.79 | 3.50% |
| 40 | Florida | $19.00 | $26.79 | 3.50% |
| 41 | West Virginia | $18.00 | $25.92 | 3.71% |
| 42 | Nevada | $18.00 | $25.92 | 3.71% |
| 43 | California | $18.00 | $25.92 | 3.71% |
| 44 | Wyoming | $20.00 | $24.69 | 2.13% |
| 45 | Maine | $19.00 | $23.73 | 2.25% |
| 46 | District of Columbia | $16.00 | $22.34 | 3.39% |
| 47 | Idaho | $19.00 | $21.75 | 1.36% |
| 48 | New Hampshire | $16.00 | $20.90 | 2.71% |
| 49 | Michigan | $16.00 | $20.90 | 2.71% |
| 50 | Delaware | $16.00 | $20.90 | 2.71% |
| 51 | Rhode Island | $16.00 | $18.80 | 1.63% |