The question, answered

Is my agency a business associate?

Usually yes, and usually without anybody having decided it. If your agency can see patient information belonging to a practice you work for, you are handling it on their behalf — and that is what the term means.

By accident

The three ways it happens by accident.

01 You built the form If submissions arrive in an inbox you can open, you are holding patient information.
02 You installed the analytics A tracker on a page that asks about symptoms sends that page's context to whoever runs the tracker, and you put it there.
03 You have the logins Access you have never used is still access.
Consequences

What follows from it.

An agreement with each practice. Obligations about safeguards, subcontractors and breach notification.

And a duty that does not go away because the work was done by a contractor or a tool.

The other option

Do not hold it.

If the forms and the phone line run somewhere you can operate but not read, you are not handling patient information and the question does not arise.

That is what blind mode is for, and it is the reason it is built into the database rather than promised in a contract.

How blind mode works →

Start by finding out what your websites are leaking.

A free scan of any practice site tells you in ninety seconds which trackers are loading on pages that collect patient information. No account, no card.