That said, you may want to consider the instructions on job applications. Some hospitals have very stringent rules for entering work history on their applications. For example, they might require every employer for the past 7 years to be entered on the application regardless of duration and also require applicants to provide an explanation of any gaps in employment of greater than 1 month. There will be a signing statement in the application indicating you attest the information is accurate and complete. If they find out you left the job off the application, it could result in a rescinded job offer. Although the chances of this happening are slim.
As for your resume summary, I think it’s best say something like, “X years experience as Charge Nurse, X years experience as an ADON, and X years as a Wound Care Nurse.” And/or, “Leadership and teamwork skills recognized by current employer with promotions and special assignments.” Remember, the summary itself is just that, a quick summary designed to pique interest and get the reader to spend more time reviewing the rest of the resume and the actual accomplishments. It’s also an excellent opportunity to match your qualifications with the required qualifications for the job. So, if the job is looking for X years experience as an ADON, then you might say, “Over X years experience as an ADON.” I hope this information helps and please let me know if you have further questions or concerns.