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Clarification for Billing Services on Fingers and Toes Using Modifiers F1-F9, FA, TI-T9 and TA vs. Modifier 50

National Government Services has identified some providers who have been billing for services on the fingers and/or the toes with modifier 50. Modifier 50 indicates a bilateral service. For a service to be bilateral according to the definition, you must have one body part on each side of the body. Since there are 10 fingers/toes, the billing must be specific to which finger/toe the service is for by utilizing the appropriate modifier(s).

Modifiers F1-F9 and FA are to be reported for the appropriate finger. Modifiers T1-T9 and TA are to be reported for the appropriate toe. Please make sure that when you submit a service to Medicare on a specific finger, or toe, that you are using one of these modifiers. Do not use modifier 50 to indicate a service was done on one finger on the left hand and one finger on the right hand as that will cause your claim to reject.

An example would be a patient receiving tenotomy on the first finger past the thumb of the left hand. The billing for this procedure would be 26460F1 to indicate the specific finger on which the procedure was performed. Billing 26460LT would not identify which finger and would be inappropriate billing.

Proper finger modifiers for usage with Medicare claim submissions are:

  • FA – Left hand, thumb
  • F1 – Left hand, second digit
  • F2 – Left hand, third digit
  • F3 – Left hand, fourth digit
  • F4 – Left hand, fifth digit
  • F5 – Right hand, thumb
  • F6 – Right hand, second digit
  • F7 – Right hand, third digit
  • F8 – Right hand, fourth digit
  • F9 – Right hand, fifth digit

Proper toe modifiers for usage with Medicare claim submissions are:

  • TA – Left foot, thumb
  • T1 – Left foot, second digit
  • T2 – Left foot, third digit
  • T3 – Left foot, fourth digit
  • T4 – Left foot, fifth digit
  • T5 – Right foot, thumb
  • T6 – Right foot, second digit
  • T7 – Right foot, third digit
  • T8 – Right foot, fourth digit
  • T9 – Right foot, fifth digit
Clarification for Billing Services on Fingers and Toes Using Modifiers F1-F9, FA, TI-T9 and TA vs. Modifier 50
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