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Reactive Arthritis A006

Last amended 
29 June 2015
Current RMA Instruments:
Reasonable Hypothesis SOP
26 of 2010
Balance of Probabilities SOP
27 of 2010
Changes from Previous Instruments:

SOP Bulletin 142

ICD Coding:
  • ICD-9-CM Codes: 099.3, 711.10-711.19, 372.33
  • ICD-10-AM Codes: M02

Reactive arthritis is an immune reaction that typically presents with large joint arthritis in the lower limbs, urethritis and conjunctivitis, commencing within four weeks of an episode of dysentery or sexually acquired urethritis.

Is specific diagnostic evidence required to apply the SOP?No.
Are there sub-factors that require specific information? – No.
Additional diagnoses covered by SOP
  • Reiter’s syndrome
Conditions not covered by SOP
  • Lyme disease, ICD code 088.8
  • Leptospirosis, ICD code 100.9
  • Septic arthritis, ICD code 711.1
  • Post-streptococcal reactive arthritis, ICD code 711.4
  • Rheumatic fever, ICD code 390
  • Arthritis due to Ross river virus, ICD code 711.5
  • Arthritis due to Barmah forest virus, ICD code 711.5
  • Arthritis due to Rubella virus, ICD code 056.71
  • Arthritis due to parvovirus B19, ICD code 711.5
Unconfirmed diagnosis

If, after applying the above information, you are unable to confirm the diagnosis, you should then:

  1. seek medical officer advice about further investigation, or;
  2. generate a diagnostic report, or;
  3. re-encode the condition, if appropriate.

The following investigations may be useful in establishing the diagnosis.

  • A report from a specialist physician or rheumatologist.