Blindness and low vision This code

Blindness and low vision

This code is not to be used as the preferred code for the “main condition” if the cause is recorded, unless the episode of care was mainly for the blindness itself.
When coding to the cause, H54.- may be used as an optional additional code.

Hearing loss

These codes are not to be used as the preferred code for the “main condition” if the cause is recorded, unless the episode of care was mainly for the hearing loss itself.
When coding to the cause, H90.- or H91.- may be used as an optional additional code.

Secondary hypertension

This code is not to be used as the preferred code for the “main condition” if the cause is recorded, unless the episode of care was mainly for the hypertension.
When coding to the cause, I15.- may be used as an optional additional code

I69.- Sequelae of cerebrovascular disease
This code is not to be used as the preferred code for the “main condition” if the nature of the residual condition is recorded.
When coding to the residual condition, I69.- may be used as an optional additional code.

O08.- Complications following abortion and ectopic and molar pregnancy
This code is not to be used as the preferred code for the “main condition”, except where a new episode of care is solely for treatment of a complication, e.g. a current complication of a previous abortion.
It may be used as an optional additional code with categories O00-O02 to identify associated complications and with categories O03-O07 to give fuller details of the complication.
Note that the inclusion terms provided at the subcategories of O08 should be referred to when assigning the fourth-character subcategories of O03-O07.

O98-O99 Maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
The subcategories provided should be used as “main condition” codes in preference to categories outside Chapter XV when the conditions being classified have been indicated by the health care practitioner to have complicated the pregnant state, to have been aggravated by the pregnancy, or to have been the reason for obstetric care.
The pertinent codes from other chapters may be used as optional additional codes to allow specification of the condition.

Categories from this chapter should not be used as “main condition” codes unless the symptom, sign or abnormal finding was clearly the main condition treated or investigated during an episode of care and was unrelated to other conditions recorded by the health care practitioner.
See also Rule MB3 (4.4.3) and the introduction to Chapter XVIII in Volume 1 for further information.

Categories from this chapter should not be used as “main condition” codes unless the symptom, sign or abnormal finding was clearly the main condition treated or investigated during an episode of care and was unrelated to other conditions recorded by the health care practitioner.
See also Rule MB3 (4.4.3) and the introduction to Chapter XVIII in Volume 1 for further information.

Where multiple injuries are recorded and no one of these has been selected as the “main condition”, code to one of the categories provided for statements of multiple injuries of:
• same type to the same body region (usually fourth character .7 in categories S00-S99);
• different types to the same body region (usually fourth character .7 in the last category of each block, i.e. S09, S19, S29, etc.); and
• same type to different body regions (T00-T05).

Note the following exceptions:
• for internal injuries recorded with superficial injuries and/or open wounds only, code to internal injuries as the “main condition”;
• for fractures of skull and facial bones with associated intracranial injury, code to the intracranial injury as the “main condition”;
• for intracranial haemorrhage recorded with other injuries to the head only, code to intracranial haemorrhage as the “main condition”; and
• for fractures recorded with open wounds of the same location only, code to fracture as the “main condition”.

When the multiple injury categories are used, codes for any individual injuries listed may be used as optional additional codes.
In the case of the exceptions mentioned, in addition to the main condition code, the associated injury may be identified either by an optional additional code or by one of the digits provided for this purpose.

T90-T98 Sequelae of injuries, of poisoning and of other consequences of external causes
These codes are not to be used as the preferred codes for “main condition” if the nature of the residual conditions is recorded.
When coding to the residual condition, T90-T98 may be used as optional additional codes.

These codes are not to be used as “main condition” codes.
They are intended for use as optional additional codes to identify the external cause of conditions classified in Chapter XIX, and may also be used as optional additional codes with conditions classified in any other chapter but having an external cause.