You would have to check via payor preference rules as to whether they want mod-50 or LT/RT. Because this is a medicine code I would be tempted to bill LT or RT as the procedure would be paid at 100% for each procedure - but would be interested in other interpretations.
Here is what supercoder says:
These are unilateral procedures. If performed bilaterally, some payers require that the service be reported twice with modifier 50 appended to the second code while others require identification of the service only once with modifier 50 appended. Check with individual payers. Modifier 50 identifies a procedure performed identically on the opposite side of the body (mirror image).
Here is MCR's instructions:
The usual payment adjustment for bilateral procedures does not apply. If procedure is reported with modifier -50 or is reported for both sides on the same day by any other means (e.g., with RT and LT modifiers or with a 2 in the units field), base payment for each side or organ or site of a paired organ on the lower of: (a) the actual charge for each side or (b) 100% of the fee schedule amount for each side. If procedure is reported as a bilateral procedure and with other procedure codes on the same day, determine the fee schedule amount for a bilateral procedure before applying any applicable multiple procedure rules.
Services in this category are generally radiology procedures or other diagnostic tests which are not subject to the special payment rules for other bilateral procedures.
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