Mini Thoracotomy

My Thoracic Surgeon does VATS "mini thoracotomies" and we need to know if this is an open procedure or endoscopic. He never mentions in his op note that he needed to use rib spreaders, which we are interpreting as an open procedure. We've been billing the endoscopic codes.
Any opinions?

Vats

Example:
For medical pleuroscopy and VATS, code 32650 supercedes codes 32601 and 32602. In other words, if pleurodesis is performed, code 32650 applies whether or not biopsies are performed as codes 32601 and 32602 are bundled into 32650. If pleurodesis is not performed, but pleural biopsies are performed, code 32602 applies and reimbursement for inspection of the pleural space (code 32601) is bundled into 32602.