CPT Codes
Testing is performed using a serial approach depending on primary tumor location.
Initial testing
Gastric tumor: KIT Exon 11
Tumors at other sites: KIT Exons 9 & 11
Additional testing performed if initial testing is negative
KIT exons (9), 13 & 17
PDGFRA exons 12, 14 & 18
| CPT code | |
| Lysis of Cells, Paraffin | 83907 |
| DNA extraction | 83890 |
| Enzymatic digestion | 83892 |
| PCR (per exon) | 83898 |
| HPLC (1st two exons) | 83903 |
| HPLC (additional exons) | 83903 |
| DNA sequencing | 83904 |
| Allele-specific PCR | 83905 |
| *Professional Fee | 88321 |
*Note: No pathology consultation fee is charged for GIST cases. Not all of the above codes are used in every case.
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