Reasonable Hypothesis SOP [1] | 31 of 2022 |
Balance of Probabilities SOP [2] | 32 of 2022 |
SOP Bulletin 229 [3]
ICD-10-AM Codes: T67.0, T67.1, T67.3, T67.4, T67.5 (see comments below)
This SOP covers various heat-related health outcomes from exercise in hot conditions, typically in younger persons. It does not cover non-exercise-related heat-induced stress/illness that typically occurs in more elderly or frail people.
The diagnosis is made on clincial grounds, based on the context of the injury, the signs and the symptoms.
* All when associated with exertion, only
# non-SOP condition
This is an acute "injury" that occurs at the time of the exertion in hot conditions.
The only SOP worsening factor is for inability to obtain appropriate clinical management. Heat syncope and heat stress/exhaustion are usually associated with complete recovery in the short term. Heat illness and heat stroke can be life-threatening events involving organ damage and there may be serious ongoing consequences. Timely diagnosis and treatment (particularly rapid cooling to lower body temperature) is effective for reducing morbidity and mortality.
ICD-10-AM T67 codes cover both exertional and non-exertional forms of heat illness, with only the former covered by the SOP.
The T67 codes should be used as follows:
T67.1 Heat syncope
T67.3 and T67.4 use for any of heat exhaustion, heat fatigue, heat intolerance, and heat stress
T67.5 Heat injury (a specific defined condition - see the SOP)
T67.0 Heat stroke
When using any of those codes decide whether the condition is exertion related or not and only apply the SOP when it is.
Other T67 codes
T67.2 "heat cramp" - a misnomer. Can occur at any ambient temperature. When an isolated occurence this condition is not usually associated with a raised body temperature. This is usually a transient condition with full recovery and no dagnosis would generally be warranted. If a diagnosis is being made the term "exercise-associated muscle cramp" is preferable. If the condition is associated with a raised body temperature then it is technically covered by the SOP definition and the SOP can be applied, but it is otherwise a non-SOP condition.
T67.6 Heat fatigue, transient - non-SOP
T67.7 Heat oedema - non-SOP
T67.8 Other effects of heat and light - non-SOP
T67.9 Effect of heat and light, unspecified - non-SOP
Heat illnesses range from mild through to severe and life threatening. The correct terminology should be used for diagnosis. In particular, "Heat stroke" should be reserved for the severe condition involving significantly raised core body temperature, organ damage and significant neurological impariment. Heat stroke is life threatening and requires hospital treatment. Heat stroke should not be confused with heat stress, the more common and milder illness. Note also that "heat injury" is a specifically defined, serious condition involving significantly raised core body temperature and organ damage, but without neurological impariment.
Links
[1] http://www.rma.gov.au/assets/SOP/2022/82c106d0cb/031.pdf
[2] http://www.rma.gov.au/assets/SOP/2022/c6ee6926d3/032.pdf
[3] https://clik.dva.gov.au/system/files/media/SOP%20Bulletin%20229.pdf