Doc,
Absolutely it should qualify. A note from your PCP should do the trick.
Bearing in mind that I'm in Canada, and so the regulations may be different... but as an employer, I am required to accommodate or provide pretty much anything that an MD requires for their patient to work as an employee of my company in a safe and health maintaining environment.
I extend this as much as possible to all associates who maintain private practices within the clinic as well; even though it is not required, as they are not my employees. They do however, utilize the clinic facilities to operate their practices and because of that, their comfort is as important to everyone, as is the comfort of employees.
For example, my office assistant is environmentally sensitive, so our cleaning products are natural products that are unscented. The janitor does a disinfection over-haul cleaning on a weekly basis, but she does that on Friday evenings, so that the odor has dissipated by the time the work week begins for that employee. We also have special filters on the furnace/AC unit, as well as HEPA filters to keep dust (we do a lot of laundry and it produces dust because we use flannel clinical sheets). The filters also control odors.
Our counselor has a dust allergy so an additional HEPA filter/ionizing unit is installed in her session room. That also allows her to have a thick rug in her session room to decrease noise and maintain patient privacy (sound proofing), because it would probably collect dust even with vacuuming. The HEPA unit also prevents allergens from her therapy dog (a large yellow lab) from accumulating.
These are small accommodations, but well worth it. A happy work place, leads to contented workers and that is essential in the provision of services to others

.
In your case, your PCP might mention in his note that if you were made to work where facilities were not easily accessible, that it would be a hardship (both mentally and physically), and that would could well affect your ability to provide services.
When I am requested by patients to write such a note (insurance coverage, disability etc), I ask them to write & provide me with a draft, including who it is directed to and what needs to be mentioned. From that I get a better picture of what the patient specifically requires to have their needs met.
You might do the same and provide a draft to your PCP when/if you make the request for the note.
Please let us know how you make out.
With love, Erika