Seeing kidney specialist with blood test showing high serum creatinine: Initial consultation

💬 [是] is the word you use to link someone to a name or identity: [我是医生] (I am a doctor), [她是王老师] (she is Teacher Wang). Chinese often drops the subject in context, but [是] stays the same.

💬 With names, Chinese uses [是] to link the subject and the name: [我是李明], [他是王医生]. You usually do not need a word for [a] before a name or job title here.

💬 [第] makes numbers into order words: [第一] first, [第二] second, [第三次] third time. So [第一次] is literally [the first time].

💬 Chinese often leaves out [我] or [这是] when the situation is obvious, so [第一次来。] naturally means [It's my first time here] or [I'm here for the first time]. You can reuse it with other time words: [第二次来。]

🇨🇳 [欢迎你来。] is friendly and natural as a greeting in a clinic or office, but staff more often just say [你好] or move straight to helping you. It sounds warm, not overly formal.