Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or service a second (or subsequent) time on the same date of service. The CPT® definition clarifies that the code signals a legitimate repeat rather than a duplicate billing event; documentation must support the distinct clinical need for the repeat. The CPT Implementation Guide also specifies that modifier -76 must not be appended to evaluation and management (E/M) services.

In practice, reporters bill the initial occurrence without the modifier and append -76 to the subsequent identical service(s) to prevent automatic denial or bundling by payers (including Medicare). The modifier is primarily informational and does not guarantee additional payment — it helps payers recognize that a repeated procedure on the same day was medically necessary. Examples from common practice include a repeated closed reduction by the same orthopedist (e.g., 27265 followed by 27265-76), a repeat set of diagnostic X-rays after casting (e.g., 73110-76), or a second chest X-ray read by the same radiologist on the same day (e.g., 71020-26-76).

Because payer rules and global period handling can vary, providers should review individual insurer policies for nuances (for instance, distinctions between modifier -76 and modifier -78 during a global surgical period). When using -76, ensure documentation clearly explains the medical necessity for the repeat service to support correct adjudication.