December 31, 2015

Q and A

As ICD-10 codes must specify laterality, i.e., right and left, are the RT and LT modifiers still required for use in conjunction with the CPT codes?

Yes, the RT and LT modifiers should still be reported with the CPT procedure/service codes, even though ICD-10-CM codes also specify laterality.

According to the Centers for Medicare & Medicaid Services FAQs When ICD-10-CM codes replace ICD-9-CM codes on October 1, 2015, it will not impact how you report Current Procedural Terminology (CPT) and Healthcare Common Procedure Coding System (HCPCS) codes, including CPT/HCPCS modifiers for physician services. While ICD-10-CM codes have expanded detail, including specification of laterality for some conditions, you should continue to follow CPT and CMS guidance when you report CPT/HCPCS modifiers for laterality.

Reference: (FAQ12518)