Which modifier indicates that a procedure was partially implemented?

The modifier that indicates a procedure was partially implemented is -52. This modifier is specifically used to signify that a service or procedure was performed but not to the full extent described by the CPT code. It effectively communicates that the service was reduced or limited in some way, providing an accurate billing representation of what was actually done.

For example, if a surgeon was unable to complete a surgical procedure due to patient-specific factors but performed part of the intended work, using modifier -52 helps to clarify that only a portion of the procedure was executed, which may reflect a reduced charge.

The other modifiers listed serve different purposes: Modifier -32 refers to a mandated service, -76 indicates a repeat procedure, and -54 indicates the surgical care portion of a procedure when another provider is handling the preoperative or postoperative care. None of these modifiers communicate the concept of a procedure being partially completed as effectively as -52 does.