Leptospirosis (A27)
ICD-10 code section A27 specifically classifies leptospirosis, a bacterial infection caused by Leptospira species. This section captures various clinical forms including Weil's disease and leptospiral meningitis, distinguishing them by severity and complications.
This coding group includes A27.0 for icterohemorrhagic leptospirosis, commonly known as Weil's disease, which is a severe form featuring jaundice and bleeding. Code A27.81 covers aseptic meningitis caused by leptospirosis, identified by inflammation of the membranes surrounding the brain and spinal cord, also termed leptospiral meningitis or meningitis caused by spirochetes. Codes A27.8 and A27.89 track other less common forms, including infections linked to various Leptospira species and conditions such as Canicola fever and leptospirosis-related uveitis. The unspecified code A27.9 is used when the exact form of leptospirosis is not documented but includes presentations such as leptospiral rash, pulmonary hemorrhage, and encephalitis. Using the appropriate code helps healthcare professionals accurately report and manage leptospirosis cases.
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Leptospira
A genus of aerobic, helical spirochetes, some species of which are pathogenic, others free-living or saprophytic.
Leptospirosis
Infections with bacteria of the genus LEPTOSPIRA.
Orientia tsutsugamushi
A gram-negative, rod-shaped to coccoid bacterium. It is the etiologic agent of SCRUB TYPHUS in humans and is transmitted by mites from rodent reservoirs.
Scrub Typhus
An acute infectious disease caused by ORIENTIA TSUTSUGAMUSHI. It is limited to eastern and southeastern Asia, India, northern Australia, and the adjacent islands. Characteristics include the formation of a primary cutaneous lesion at the site of the bite of an infected mite, fever lasting about two weeks, and a maculopapular rash.
Weil Disease
A severe form of LEPTOSPIROSIS, usually caused by LEPTOSPIRA INTERROGANS SEROVAR ICTEROHAEMORRHAGIAE and occasionally other serovars. It is transmitted to humans by the rat and is characterized by hemorrhagic and renal symptoms with accompanying JAUNDICE.
