die Arztpraxis
doctor's office
The premises where an independent doctor examines and treats patients.
Die Arztpraxis ist montags bis freitags von 8 bis 18 Uhr geöffnet.
The doctor's office is open Monday to Friday from 8 a.m. to 6 p.m.

doctor's office / medical practice
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doctor's office
The premises where an independent doctor examines and treats patients.
Die Arztpraxis ist montags bis freitags von 8 bis 18 Uhr geöffnet.
The doctor's office is open Monday to Friday from 8 a.m. to 6 p.m.

The word 'Arztpraxis' (doctor's office / medical practice) is made up of 'der Arzt' (the doctor) and 'die Praxis' (the practice). So it literally means the place where a doctor carries out their practice, that is, their professional activity.
Ich muss heute Nachmittag noch in die Arztpraxis, um ein Rezept abzuholen.
I still have to go to the doctor's office this afternoon to pick up a prescription.
The verb tells you whether the premises (m01) or the business (m02) is meant. Verbs of movement or staying somewhere, such as 'gehen' (to go) or 'warten' (to wait), refer to the premises. Verbs like 'übernehmen' (to take over), 'verkaufen' (to sell), or 'führen' (to run) refer to the business.
Sie wartete eine Stunde im Wartezimmer der Arztpraxis.
She waited for an hour in the waiting room of the doctor's office.
To describe movement, you use 'in die Arztpraxis' (into the doctor's office) with the accusative. To describe a location or state, you use 'in der Arztpraxis' (in the doctor's office) with the dative.
Der Patient wird direkt in die Arztpraxis gebracht.
The patient is brought directly into the doctor's office.
When the medical practice is meant as a business, it is often combined with verbs such as 'eine Praxis eröffnen' (to open a practice), 'eine Praxis führen' (to run a practice), 'eine Praxis übergeben' (to hand over a practice), or 'eine Praxis schließen' (to close a practice).
Nach 30 Jahren hat sie ihre Arztpraxis an eine Nachfolgerin übergeben.
After 30 years, she handed over her medical practice to a successor.
practice / office
'die Praxis' and 'die Arztpraxis' can both refer to the rooms where patients are treated. However, 'die Praxis' is more general. It can belong to a doctor, dentist, lawyer, or another freelance professional. 'die Arztpraxis' is more specific and means only the practice of a male or female doctor. Learners may confuse the words because in everyday speech people often simply say 'Praxis' when the context makes it clear that it is about a doctor. If it is not clear, or if you want to be medically precise, 'Arztpraxis' is better.

Am Montag hat die neue Arztpraxis in unserer Straße geöffnet.
On Monday, the new doctor's office on our street opened.
Nach dem Termin verlässt Maria die Praxis und ruft ihre Mutter an.
After the appointment, Maria leaves the office and calls her mother.