Перед приёмом я положила медкарту в сумку рядом с паспортом.

It means before the appointment or before the consultation.

In a medical context, приём often means a doctor's appointment, consultation, or the time when a doctor sees a patient. So перед приёмом is naturally understood as before the appointment.

Because перед takes the instrumental case when it means before / in front of.

So:

• приём = nominative
• приёмом = instrumental singular

That is why you get:

• перед приёмом = before the appointment

This is a very common pattern:

• перед уроком = before the lesson
• перед встречей = before the meeting
• перед сном = before sleep / before going to bed

Because Russian past tense agrees with the gender of the subject.

• я положил = I put, if the speaker is male
• я положила = I put, if the speaker is female

So this sentence tells you that the speaker is female.

Положила is perfective, so it presents the action as a completed whole: she put the medical card into the bag.

This is the normal choice when talking about a single completed action.

Compare:

• я положила медкарту в сумку = I put the medical card in the bag
• я клала медкарту в сумку = I was putting / used to put the medical card in the bag

In this sentence, the speaker is talking about one finished action before the appointment, so положила fits best.

Медкарту is the accusative form of медкарта, which is a common shortened, informal word for медицинская карта.

It means a medical card, medical record, or patient file, depending on context.

Forms:

• медкарта = nominative
• медкарту = accusative

Since it is the direct object of положила, it appears in the accusative:

• я положила что? → медкарту

Because Russian uses different cases depending on whether you mean:

• movement into something
• location inside something

Here, the card is being put into the bag, so Russian uses:

• в + accusative → в сумку

Compare:

• положить в сумку = to put into the bag
• лежать в сумке = to be in the bag

So:

• в сумку = into the bag
• в сумке = in the bag

Because сумка is a feminine noun, and after в meaning movement into, it takes the accusative case.

For feminine nouns ending in -а, the accusative singular usually changes -а to -у:

• сумка → сумку
• книга → книгу
• ручка → ручку

So:

• в сумку = into the bag

It means next to the passport or beside the passport.

The phrase рядом с means next to / beside and requires the instrumental case.

So:

• паспорт = passport
• паспортом = instrumental singular

That is why the sentence says:

• рядом с паспортом

Because of the expression рядом с, which always takes the instrumental case.

So:

• паспорт = nominative
• паспортом = instrumental

Other examples:

• рядом с домом = next to the house
• рядом с машиной = next to the car
• рядом с врачом = next to the doctor

Russian often leaves out possessives like my, your, or his when they are obvious from context.

In English, you would usually say:

• I put my medical card in my bag next to my passport

In Russian, that would often sound unnecessarily repetitive if the ownership is clear. So Russian naturally says:

• Я положила медкарту в сумку рядом с паспортом.

The listener will normally understand that these are the speaker's own things.

The word order is natural and neutral.

• Перед приёмом = sets the time frame first
• я положила = subject + verb
• медкарту = direct object
• в сумку = where she put it
• рядом с паспортом = more detail about location

Russian word order is more flexible than English, but this sentence sounds straightforward and ordinary.

You could move parts around for emphasis, for example:

• Я перед приёмом положила медкарту в сумку рядом с паспортом.
• Медкарту я положила в сумку рядом с паспортом перед приёмом.

These are still understandable, but the original version is the most neutral.

Yes. Приём is a broad word and can have several meanings depending on context, for example:

• reception
• appointment
• consultation
• admission
• even a method/technique in some contexts

But in this sentence, because of медкарту and паспорт, the medical meaning is the most natural one: an appointment with a doctor or medical consultation.

A male speaker would say:

Перед приёмом я положил медкарту в сумку рядом с паспортом.

The only change is:

• положила → положил

Everything else stays the same.