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Porphyria Cutanea Tarda M003

Last amended 
29 June 2015
Current RMA Instruments:
Reasonable Hypothesis SOP
43 of 2012
Balance of Probabilities SOP
44 of 2012
Changes from Previous Instruments:

SOP Bulletin 159

ICD Coding:
  • ICD-9-CM Codes: 277.1
  • ICD-10-AM Codes: E80.1

This is a skin condition (cutaneous) due to a metabolic condition involving porphyrin metabolism (porphyria). The term ‘tarda’ refers to the late onset of the condition.

The porphyrins accumulate in the skin and liver and then the exposure to sunlight leads to skin lesions on the sun exposed areas.  This condition can be familial or acquired.

Is specific diagnostic evidence required to apply the SOP? – Yes.

This diagnosis is based on specialist dermatologist opinion.

Are there sub-factors that require specific information? – No

Conditions excluded from SOP

  • Acute intermittent porphyria
  • Other porphyrias
Unconfirmed diagnosis

If, after applying the above information, you are unable to confirm the diagnosis, you should then seek medical officer advice about further investigation.