Ne samo da ima mikročip nego i zdravstvenu knjižicu.

It means not only ... but also ....

So:

• Ne samo da ima mikročip nego i zdravstvenu knjižicu.
• literally: Not only does it/he/she have a microchip, but also a health booklet.

This is a very common Croatian pattern for adding emphasis and listing two things that are both true.

In this structure, da introduces the clause after ne samo.

So Croatian says:

• ne samo da ima ...
• literally something like not only that it has ...

In natural English, you would not translate the da separately. It is just part of the standard Croatian construction.

A learner may expect Ne samo ima ..., but that sounds wrong here. The normal pattern is:

• ne samo da + finite verb
• nego/već i + the second element

Croatian often leaves out subject pronouns when they are understood from context.

So ima can mean:

• he has
• she has
• it has

depending on the situation.

This is normal in Croatian. The subject is omitted because it is already known or obvious.

Because Croatian often omits repeated words when they are easy to understand from context.

The full idea is:

• Ne samo da ima mikročip nego i zdravstvenu knjižicu.
• understood as: Ne samo da ima mikročip nego ima i zdravstvenu knjižicu.

The second ima is left out because it would be repetitive. This is very common.

You could include it for clarity or emphasis:

• Ne samo da ima mikročip nego ima i zdravstvenu knjižicu.

But the version without the second ima is perfectly natural.

Mikročip is the direct object of ima, so it is in the accusative singular.

However, for many masculine inanimate nouns, the accusative singular looks exactly the same as the nominative singular.

So:

• nominative: mikročip
• accusative: mikročip

That is why you do not see a different ending here.

Because this phrase is also the direct object of ima, so it must be in the accusative singular.

The basic dictionary form is:

• zdravstvena knjižica

But after ima, it changes to the accusative:

• zdravstvenu knjižicu

Both the adjective and the noun change because they must agree with each other.

So:

• nominative: zdravstvena knjižica
• accusative: zdravstvenu knjižicu

This is a very important Croatian pattern: adjectives match the noun in gender, number, and case.

It is accusative singular feminine.

Why?

Because imati = to have, and the thing someone has is usually the direct object. In Croatian, the direct object is commonly in the accusative.

So in this sentence, both things being had are objects of ima:

• mikročip
• zdravstvenu knjižicu

The difference is that mikročip happens to look the same in nominative and accusative, while zdravstvenu knjižicu clearly changes form.

Yes, very often Croatian uses either:

• ne samo ... nego i ...
• ne samo ... već i ...

Both usually mean not only ... but also ....

So you may also see:

• Ne samo da ima mikročip već i zdravstvenu knjižicu.

The version with nego i is very common and natural.

Yes, that is also possible.

Compare:

• Ne samo da ima mikročip nego i zdravstvenu knjižicu.
• Ima ne samo mikročip nego i zdravstvenu knjižicu.

Both mean roughly the same thing. The first version is a very clear, standard not only ... but also ... structure. The second version places ima first and may feel a bit more straightforward.

Croatian word order is flexible, but changing the order can slightly change emphasis.

Literally, knjižica is a diminutive of knjiga and originally means something like small book or booklet.

In real usage, it often means a small official booklet or document. So zdravstvena knjižica refers to a health booklet / medical booklet / health insurance booklet, depending on the system and context.

So although the literal image is little book, the actual meaning is administrative and practical.

Yes. Mikročip is a normal Croatian noun, borrowed and adapted to Croatian spelling.

Notice the spelling:

• mikro-
• čip

Croatian writes it in a way that matches Croatian pronunciation and orthography.

It behaves like a regular masculine noun in grammar.

It is basically neutral standard Croatian.

Nothing in it is especially slangy or very formal. You could hear or read this kind of sentence in everyday speech, news, instructions, or administrative contexts.

The phrase ne samo da ... nego i ... is standard and widely used.

Here i means also / too and completes the not only ... but also ... pattern.

So:

• ne samo ... nego i ...
• not only ... but also ...

Without i, the sentence could still sometimes be understandable in some contexts, but nego i is the normal and expected combination in this structure.