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Central Distributor SEDD: Description of Data Elements

CPTM2_n - Second CPT-4/HCPCS modifier
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

Two-digit modifiers for CPT and HCPCS codes indicate that a service or procedure that has been performed has been altered by some specific circumstances, but not changed in its definition. Examples include the following:

  • Modifier 22 - Unusual Service: The service provided is greater than that usually required for the listed procedure. For example, a speech and language evaluation (CPT 92506) that requires twice the amount of time as "typical."
  • Modifier RT and LT - Side of body: Indicates service performed on the right or left side of the body.
  • Modifier 76 and 77 - Repeat Procedure: Modifier 76 indicates that the procedure was repeated by the same physician in the same day. Modifier 77 indicates that the procedure was repeated by another physician.

More than one modifier may be used for an individual HCPCS/CPT code. When billing HCPCS/CPT codes with more than one modifier, the functional modifier is supposed to be placed in the first modifier field. Informational modifiers should be placed in the second modifier field. For example, if a physician billed a CPT code with both the modifier 22 for unusual services and the modifier LT to indicate the procedure was performed on the left side of the body, the 22 would be placed in the first modifier field and the LT would be placed in the second modifier field.

During HCUP processing, modifiers are validated. Invalid modifiers are set to "i".

Uniform Values
VariableDescriptionValueValue Description
CPTM2_nSecond CPT-4/HCPCS modifier2(a)CPT Modifier
State Specific Notes


This data element was provided by Utah for ambulatory surgery (AS) records and not supplied for the emergency department (ED) records. However, when AS records with evidence of ED services were placed in the SEDD during HCUP processing, this data element was also added to the SEDD. Therefore, very few records in the SEDD will contain values for this data element.


Internet Citation: HCUP Central Distributor SEDD Description of Data Elements - All States. Healthcare Cost and Utilization Project (HCUP). May 2024. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 5/22/24