The CPT book contains codes for unlisted procedures. Use these codes only when there is no procedure code that accurately describes the service rendered. A report is required as these services are reimbursed by report (see below).
The same physician or other qualified health care provider that performed the primary service/procedure must perform the add-on service/procedure. Add-on codes describe additional intra-service work associated with the primary service/procedure (e.g., additional digit(s), lesions(s), neurorrhaphy(s), vertebral segment(s), tendon(s), joint(s)).
Add-on codes are always performed in addition to the primary service/procedure, and must never be reported as a stand-alone code. All add-on codes found in the CPT book are exempt from the multiple procedure concept (see modifier 51 definition in this section). Add-on codes are reimbursed at one hundred percent (100%) of the maximum allowable reimbursement allowance or the provider's charge, whichever is less.
Refer to the most current version of the CPT book for a complete list of add-on codes.
Codes exempt from modifier 51 are reimbursed at one hundred percent (100%) of the maximum allowable reimbursement allowance or the provider's charge, whichever is less.
Moderate (Conscious) Sedation. To report moderate (conscious) sedation provided by the physician also performing the diagnostic or therapeutic service for which conscious sedation is being provided, see codes 99143-99145. It is not appropriate for the physician performing the sedation and the service for which the conscious sedation is being provided to report the sedation separately when the code is listed with the conscious sedation symbol K. The conscious sedation symbol identifies services that include moderate (conscious) sedation. A list of codes for services that include moderate (conscious) sedation is also included in the most current CPT book.
For procedures listed with K, when a second physician other than the health care professional performing the diagnostic or therapeutic services provides moderate (conscious) sedation in the facility setting (e.g., hospital, outpatient hospital/ambulatory surgery center, skilled nursing facility), the second physician reports the associated moderate sedation procedure/service using codes 99148-99150.
Moderate sedation codes are not used to report minimal sedation (anxiolysis), deep sedation, or monitored anesthesia care.
20 Miss. Code. R. 2-IV