| State | Year first passed |
| Texas | 1997 |
| New Hampshire | 1994 |
| Maine | 1995 |
| Colorado | 1997 |
| Delaware | 1998 |
| Pennsylvania | 1998 |
| South Dakota | 1998 |
| California | 1999 |
| Hawaii | 1999 |
| Louisiana | 1999 |
| Missouri | 1999 |
| Montana | 1999 |
| Nebraska | 1999 |
| Nevada | 1999 |
| New Jersey | 1999 |
| Oklahoma | 1999 |
| Virginia | 1999 |
| Massachusetts | 2000 |
| Illinois | 2001 |
| Kansas | 2001 |
| West Virginia | 2002 |
American Psychological Association. (2002, December 1). States with diagnosis-specific parity laws. Monitor on Psychology, 33(11). https://www.apa.org/monitor/dec02/diagnosis
