A modifier provides the means by which the reporting physician or provider can indicate that a service or procedure that has been performed has been altered by some specific circumstance but not changed in its definition or code.
Level I modifiers are codes and descriptors copyrighted by the American Medical Association's current procedural terminology (CPT).
Level II modifiers are codes and descriptors approved and maintained jointly by the alpha-numeric editorial panel (consisting of CMS, the Health Insurance Association of America, and the Blue Cross and Blue Shield Association).
| Modifier | Description | Effective | |
|---|---|---|---|
| TL | Early intervention/individualized family service plan (ifsp) | Apr 01, 2002 | |
| TM | Individualized education program (iep) | Apr 01, 2002 | |
| TN | Rural/outside providers' customary service area | Apr 01, 2002 | |
| TP | Medical transport, unloaded vehicle | Apr 01, 2002 | |
| TQ | Basic life support transport by a volunteer ambulance provider | Apr 01, 2002 | |
| TR | School-based individualized education program (iep) services provided outside the public school district responsible for the student | Jul 01, 2002 | |
| TS | Follow-up service | Jan 01, 2006 | |
| TT | Individualized service provided to more than one patient in same setting | Oct 01, 2002 | |
| TU | Special payment rate, overtime | Jan 01, 2003 | |
| TV | Special payment rates, holidays/weekends | Jan 01, 2003 | |
| TW | Back-up equipment | Jan 01, 2003 | |
| U1 | Medicaid level of care 1, as defined by each state | Jul 01, 2002 | |
| U2 | Medicaid level of care 2, as defined by each state | Jul 01, 2002 | |
| U3 | Medicaid level of care 3, as defined by each state | Jul 01, 2002 | |
| U4 | Medicaid level of care 4, as defined by each state | Jul 01, 2002 | |
| U5 | Medicaid level of care 5, as defined by each state | Jul 01, 2002 | |
| U6 | Medicaid level of care 6, as defined by each state | Jul 01, 2002 | |
| U7 | Medicaid level of care 7, as defined by each state | Jul 01, 2002 | |
| U8 | Medicaid level of care 8, as defined by each state | Jul 01, 2002 | |
| U9 | Medicaid level of care 9, as defined by each state | Jul 01, 2002 | |
| UA | Medicaid level of care 10, as defined by each state | Jul 01, 2002 | |
| UB | Medicaid level of care 11, as defined by each state | Jul 01, 2002 | |
| UC | Medicaid level of care 12, as defined by each state | Jul 01, 2002 | |
| UD | Medicaid level of care 13, as defined by each state | Jul 01, 2002 | |
| UE | Used durable medical equipment | Jan 01, 1997 |