The link above in the response is from AAPC 2018.
See the CMS Manuals for 2025 info. There is more than just the snips I took below here to read about in Chapter 12. It depends on the type of procedure, drugs, place of service, etc. You have to read the whole thing in context. Some services may not qualify for incident-to at all. (e.g.; Services which have their own statutory benefit categories)
30.5 - Payment for Codes for Chemotherapy Administration and Nonchemotherapy Injections and Infusions (Rev. 13012; Issued: 12-19-24; Effective: 01-01-25; Implementation: 01-02-25)
"Physician work related to hydration, injection, and infusion services involves the affirmation of the treatment plan
and the supervision (pursuant to incident to requirements) of non physician clinical staff."
Another example wording, "The CPT 2006 includes a parenthetical remark immediately following CPT code 90772(Therapeutic, prophylactic or diagnostic injection; (specify substance or drug); subcutaneous or intramuscular.) It states, “Do not report 90772 for injections given without direct supervision. To report, use 99211.” This coding guideline
does not apply to Medicare patients. If the RN, LPN or other auxiliary personnel furnishes the injection in the office and the
physician is not present in the office to meet the supervision requirement, which is one of the requirements for coverage of an incident to service, then the injection is not covered. The physician would also not report 99211 as this would not be covered as an incident to service."
If the physician is not there the whole time. It is not incident-to. They can't just be there part of the time. However, be sure to read the manuals for exceptions or specific direction related to infusions.
- Immediately Available: CMS has clarified that "immediately available" means "without delay" so Noridian considers "immediately available" to mean the supervising physician is in the office suite or patient's home, readily available and without delay, to assist and take over the care as necessary.
- Office Suite: An "office suite" is limited to the dedicated area, or suite, designated by records of ownership, rent or other agreement with the owner, in which the supervising physician or practitioner maintains his/her practice or provides his/her services as part of a multi-specialty clinic.
Direct Supervision
Physician must be
present in the office suite,
immediately available and able to provide assistance and direction throughout the time the service is performed. The supervising physician does not have to be in the same room but must be in the office or clinic.
When a patient is seen in a group practice by a NPP, It is acceptable to have an NPP perform an "incident to" service when another physician of the group is in the suite and available for oversight as needed. Group members may provide cross coverage for each other and "incident to" guidelines can be met in this circumstance.
Services performed in the home by auxiliary personnel, such as nurses, technicians, and therapists are covered when performed "incident to" the physician's service only if there is direct supervision in the home by the physician.