ASC surgical procedures billed with modifier -73 or -52 shall not be subjected to further pricing reductions (i.e., the multiple procedure price reduction rules will not apply). The hospital outpatient prospective payment system (OPPS)/ASC final rule for the relevant payment year specifies whether or not a surgical procedure is subject to multiple procedure discounting for that year. For more information, see the Medicare Claims Processing Manual, Chapter 14, Section 40.5.
Source: CMS
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