99211 is an established patient office or other outpatient visit that may not require the presence of a physician. To bill incident-to, the incident-to rules must be met. To ensure the services meet those requirements, utilize the incident-to tool on our website. This applies to E/M services prior to 2021 and after.

Reference 

• CMS IOM Pub. 100-04 Medicare Claims Processing Manual, Chapter 12, section 30.6