What modifier do you use with cpt code 94640 and j7611?

For CPT code 94640 (inhalation treatment for Asthma or COPD), you typically do not need a modifier unless there are specific circumstances requiring one. For J7611 (albuterol sulfate for inhalation), you may use modifier -59 to indicate a distinct procedural service if it is administered separately from other services. Always refer to current payer guidelines for specific modifier requirements.