Help with coding on MOH's Procedure

The physician did a MOH's panel of 9 specimans which result in him coding 17313 and 17315 (4). Do I enter the charge are 4 different specimans or can 17315 only be charged 1 time with a modifer. The dx code is 173.5

Mohs

CPT code 17315 may be used to report each block after the first 5 blocks for any single stage (17315 is used as an add-on code to 17311, 17312, 17313 or 17314). Please note that this code refers to the number of blocks, not number of slides.