Modifier RT- Right Side

Modifier RT is used to identify procedures performed on the right side of the body.

What is Modifier RT?

Modifier RT tells insurance payers that a service or procedure was performed on the patient’s right side.

When to Use Modifier RT

• A procedure is performed on the right side
• Laterality must be identified
• The payer requires side-specific billing
• Documentation supports right-side treatment

Billing Example

A provider performs a procedure on the patient’s right knee. Modifier RT may be appended to the procedure code to identify the right side.

Documentation Tips

• Clearly document right-side location
• Match the modifier to the medical record
• Avoid using RT when laterality is not required
• Confirm payer-specific billing requirements

Common Denial Reasons

• Laterality missing from documentation
• Modifier does not match provider notes
• Incorrect side reported
• Modifier not required for the service

Related Modifiers

Modifier LT

Modifier XS

Modifier XE

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