NCCI and CPT guidelines are not always the same - sometimes NCCI does not allow payment on a code that CPT tells you to report (use of operating microscope is a good example that I see often). It would not be appropriate add a modifier to unbundle the closure in this case. Generally under NCCI if a code is bundled, that tells you that the RVU value assigned to the procedure includes the work of the bundled code.
The following paragraph is from chapter 3 of the NCCI manual:
Closure/repair of a surgical incision is included in the global surgical package except as noted below. Wound repair CPT codes 12001-13153 should not be reported separately to describe closure of surgical incisions for procedures with global surgery indicators of 000, 010, 090, or MMM. Simple, intermediate, and complex wound repair codes may be reported with Mohs surgery (CPT codes 17311-17315). Intermediate and complex repair codes may be reported with excision of benign lesions (CPT codes 11401-11406, 11421-11426, 11441-11471) and excision of malignant lesions (CPT codes 11600-11646). Wound repair codes (CPT codes 12001-13153) should not be reported with excisions of benign lesions with an excised diameter of 0.5 cm or less (CPT codes 11400, 11420, 11440).