Seeking additional information on these codes. Provider is billing for both and recently there have been several denials stating the the required modifier is missing when being billed together. What modifier is the insurance referring to? Are there any other codes that may be considered bundled when the provider performs either one? I am having this error consistently with Medicare part B (for MI) and Blue Cross Blue Shield (for MI) on several claims when there is only a 92273 or 92274. Any input would be helpful as the insurances are not giving me any insight as to why. Thank you.