Chapter VI - Diseases of the nervous system

Question 1

What are the 2 stages of onset of Alzheimer’s disease classified at G30.- ?

Answer 1

• Early onset - before 65, AKA Type 2
• Late onset - after 65, AKA Type 1

Question 2

What is meant by the term ‘episodic’ at block G40-G47 Episodic and paroxysmal disorders?

Answer 2

Conditions that flare up periodically

Question 3

Why must epilepsy always be recorded when documented in the medical record?

Answer 3

Epilepsy is included in Appendix 1: Co-morbidities list and is therefore always considered clinically relevant

Question 4

When an epileptic patient is admitted for treatment of an injury sustained during an epileptic fit, how should this be coded?

Answer 4

• The injury must be coded as the primary diagnosis.
• The external cause must be coded next.
• Followed by the relevant epilepsy code.

Question 5

How must loss of vision with Amaurosis fugax be coded?

Answer 5

An additional code classifying the loss of vision must not be assigned.

Question 6

When can codes within categories G81-G83 (Hemiplegia, Paraplegia and tetraplegia and other paralytic syndromes) be assigned in the primary position?

Answer 6

Only when their cause is not recorded
If the cause is known, they are assigned in a secondary position.
Exception: when the cause is no longer present (sequela)

Question 7

How must hemiplegia (G81) when due to a stroke that is currently being treated be coded?

Answer 7

Hemiplegia must be coded in a secondary position to the stroke.

Question 8

When can the codes C90.0D Multiple myeloma and G63.1A Polyneuropathy in neoplastic disease be assigned to show POEMS syndrome?

Answer 8

These codes must only be assigned when all the features of this disease are present and have been confirmed by the responsible consultant.

The features of POEMS syndrome are:
* Polyneuropathy
* endocrinopathy
* monoclonal gammopathy
* skin changes
* myeloma