ICD-10 Code M00.842 – Arthritis due to other bacteria, left hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.842 – Arthritis due to other bacteria, left hand
What it is
M00.842 identifies septic arthritis of the left hand caused by bacteria other than the common specified organisms. It means the joint infection is documented in the left hand and linked to a bacterial cause.
Clinical signs
Typical findings include localized joint pain, swelling, warmth, and limited motion in the affected hand. Clinical features vary; refer to documentation for the specific joint and organism.
When to use this code
Use this code when the record clearly states bacterial arthritis in the left hand and identifies the infection as due to other bacteria. It is appropriate when the provider documents septic arthritis or infectious arthritis of a left-hand joint. Check documentation if laterality or organism is unclear.
Do not use for
Do not use this code for noninfectious arthritis, such as osteoarthritis or rheumatoid arthritis. Also avoid it when the infection is in another site or when the bacterial cause is not documented.
Coding tip
Verify both laterality and infectious etiology in the note before assigning M00.842.