Why is it die Arztpraxis?

Arztpraxis is a compound noun, and German compounds take the article of their last word: die Praxis. So it’s die Arztpraxis.

Sense 1
die

Meaning

[1] Workplace of a resident general practitioner or specialist

[1] Arbeitsstätte eines niedergelassen Allgemeinmediziners oder Facharztes

Examples

[1] The doctor's office is closed on Wednesday

[1] Die Arztpraxis ist am Mittwoch geschlossen.

[1] In the doctor's office, the doctor treats the patiente

[1] In der Arztpraxis behandelt der Arzt die Patienten.
More source examples (1)

These dictionary examples can include historical and less common uses.

[1] "In the doctor's office is the usual practice, before practice is the criminal office"

[1] „In der Arztpraxis ist das übliche Praxis, vor der Praxis ist das strafbar.“

Declension

1 Singular Plural
Nominativ die Arztpraxis die Arztpraxen
Genitiv der Arztpraxis der Arztpraxen
Dativ der Arztpraxis den Arztpraxen
Akkusativ die Arztpraxis die Arztpraxen

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary