Modifier 77- Separate encounter

Repeat Procedure or Service by Another Physician or Other Qualified Health Care Professional

What is Modifier 77?

Modifier 77 tells insurance payers that a procedure or service was intentionally repeated by a different physician or qualified healthcare professional. It helps distinguish a medically necessary repeat service from duplicate billing.

When to Use Modifier 77

• The same procedure or service is repeated
• A different physician or qualified healthcare professional performs the repeat service
• The repeat procedure is medically necessary
• Documentation supports the reason for repeating the procedure

Billing Example

A patient receives a diagnostic imaging study interpreted by one physician. Later that day, the patient's condition changes, and another physician repeats the same imaging study to evaluate the new clinical findings. Modifier 77 may be appended to the repeated service.

Documentation Tips

• Document why the procedure was repeated
• Identify both healthcare professionals involved
• Record the timing of each procedure
• Explain the medical necessity for the repeat service

Common Denial Reasons

• Medical necessity for the repeat service is not documented
• Claims appear to contain duplicate services
• The same provider performed both procedures instead of a different provider
• Incorrect modifier selection

Related Modifiers

Modifier 26

Modifier 76

Modifier TC

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