77

Modifier 77

Repeat Procedure or Service by the Same Physician

Active

Global Period

Varies by Procedure

Modifier

Applies To

Repeated Procedures

Category

Use With

Repeat Procedure

CPT Codes

What is Modifier 77?

Modifier 77 is used to report a procedure or service that is repeated by another physician or qualified healthcare professional on the same day. The modifier tells the payer that the repeat service was medically necessary and performed by a different provider rather than the physician who performed the original procedure.

Modifier 77 is commonly used when a patient's condition changes, requires confirmation, or additional treatment by another physician during the same day.

When to Use

A different physician repeats the same procedure.
A repeat diagnostic test is medically necessary.
Another provider performs the repeat service during the same day.
The same CPT code is reported by a different physician.

Documentation Requirements

Document why the procedure was repeated.
Support the medical necessity for the repeat service.
Identify both physicians involved.
Include complete procedural documentation.
Clearly indicate that a different physician performed the repeat procedure.

Examples

Example 1

A patient undergoes an ECG in the emergency department. Later that day, a cardiologist repeats the ECG to evaluate changes in the patient's condition. Modifier 77 is appended because a different physician performed the repeat procedure.

Example 2

A patient receives a chest X-ray interpreted by an emergency physician. After admission, a pulmonologist repeats the imaging due to worsening respiratory symptoms. Modifier 77 may be appropriate because the repeat study was medically necessary and performed by another physician.

Billing Tips

Use Modifier 77 only when a different physician repeats the procedure.
Ensure documentation supports medical necessity.
Do not use Modifier 77 for duplicate billing.
If the same physician repeats the procedure, use Modifier 76 instead.
Follow payer-specific billing guidelines.

Common Denial Reasons

Documentation does not support medical necessity.
Duplicate billing without justification.
Same physician performed both procedures.
Modifier appended to an ineligible CPT code.
Insufficient procedural documentation.

Related Modifiers

Modifier 24

Unrelated E/M Service During the Postoperative Period

Modifier 25

Significant, Separately Identifiable E/M Service

Modifier 57

Decision for Surgery

Modifier 76

Repeat Procedure by the Same Physician

Additional Resources

Modifier 77 is used when another physician or qualified healthcare professional repeats a medically necessary procedure or diagnostic service. Accurate documentation of the repeat service and identification of the different provider help support proper reimbursement and reduce claim denials.

For comprehensive billing guidance, coding scenarios, documentation requirements, payer policies, modifier comparisons, and real-world examples, visit ModifierLookup.com for the complete Modifier 77 reference guide.