Store names & possessive
Is the following sentence a correct usage to tell someone that I’m in the clinic to see the doctor right now
I’m at the doctor’s
Perfectly normal spoken English, informal written English, and written dialog. It will be understood by all native speakers of AmE (like me) and probably by all native speakers of BrE.
For something a little more complete: I’m at the doctor’s office or I’m at the dermatology clinic.