ICD10 code of Reactive Arthritis and ICD9 code

The primary ICD-10-CM code for Reactive Arthritis is M02.9 (Reactive arthritis, unspecified), while the historical ICD-9-CM code was 711.30. These codes are essential for medical documentation and billing, reflecting the systemic nature of Reactive Arthritis following a distant infection.

What is the clinical definition of Reactive Arthritis?

Reactive Arthritis is a form of inflammatory arthritis that occurs as a "reaction" to an infection elsewhere in the body, typically in the gastrointestinal or genitourinary tracts. Unlike septic arthritis, the joints themselves are not infected, but the body's immune system triggers inflammation in response to a bacterial pathogen. At DiseaseMaps.org, 33 members currently share their experiences managing the chronic and acute phases of Reactive Arthritis.

How is Reactive Arthritis coded for medical records?

Clinical coding for Reactive Arthritis depends on the specific site and the triggering organism. While M02.9 is the general code, clinicians may use more specific sub-codes based on the anatomical location of the inflammation. Common coding categories include:

• M02.30: Reactive arthritis, unspecified site.


• M02.80: Other reactive arthropathies, unspecified site.


• M02.10: Post-dysenteric reactive arthritis (often linked to Salmonella, Shigella, or Campylobacter).


• M02.31: Reactive arthritis of the shoulder.

What triggers Reactive Arthritis?

The onset of Reactive Arthritis is typically 1 to 4 weeks after an initial gastrointestinal or urogenital infection. Research indicates that individuals who are HLA-B27 positive may be at a higher risk of developing Reactive Arthritis following exposure to specific bacteria. Understanding the link between the initial infection and the immune response is key to managing the flares associated with Reactive Arthritis.

Next steps

• Consult a rheumatologist to confirm your diagnosis and rule out other inflammatory conditions.


• Keep a symptom diary to track potential triggers or recurring flare-ups of Reactive Arthritis.


• Connect with the 33 members on DiseaseMaps.org to share coping strategies for living with chronic joint inflammation.


• Request your medical records to ensure your healthcare provider is using the correct ICD-10 coding for your specific case.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding any medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Reactive Arthritis.


• Orphanet: Portal for rare diseases and orphan drugs.


• ICD-10-CM Browser (CDC/NCHS): M02 series for Reactive Arthropathies.


• Arthritis Foundation: Reactive Arthritis overview and clinical guidance.