I don't believe so. You need something to indicate that the skin tag removal was separate from the well visit exam.
Modifier 33: preventive service. Modifier 33 is applied to indicate that the preventive service is one that waives a patient's co-pay, deductible, and co-insurance.
An exception is that modifier 33 does not have to be appended to those services that are inherently preventive (for instance, screening mammography).
Most of the services to which the modifier applies are not new, so the list will not surprise you. According to the AMA, CPT modifier 33 is applicable for the identification of preventive services without cost-sharing in these four categories:
services rated A or B by the U.S. Preventive Services Task Force (USPSTF) as posted annually on the Agency for Healthcare Research and Quality's Web site at http://uspreventiveservicestaskforce.org/uspstf/uspsabrecs.htm;
immunizations for routine use in children, adolescents, and adults as recommended by the Advisory Committee on Immunization Practices of the U.S. Department of Health and Human Services;
preventive care and screenings for children as recommended by Bright Futures program of the American Academy of Pediatrics and the newborn screening recommendations of the American College of Medical Genetics as supported by the Health Resources and Services Administration (HRSA); and
preventive care and screenings provided for women (not included in the task force recommendations) in the comprehensive guidelines supported by the HRSA.