、。
Hello, this is Yamada Clinic.
Literal
Hello, Yamada Clinic is.
A phone-answer formula. もしもし is the standard telephone greeting — used when picking up a phone, to signal 'hello' and to verify the connection. 'Mooshimooshi' is actually a polite corruption of 申し申し (the classical humble 'I say, I say'). Nowadays used exclusively on the phone — not as a general greeting. 山田医院です is the reception line's self-identification, using the です copula for polite self-naming. This two-clause formula (greeting + identification) is the textbook opening of a Japanese phone call.