ICD10 code of Lemierres syndrome and ICD9 code

Lemierre's syndrome does not have a unique, dedicated ICD-10 or ICD-9 code; instead, it is typically coded by documenting the primary infection (often Fusobacterium necrophorum) and the associated complications like internal jugular vein thrombosis. In ICD-10-CM, clinicians frequently use codes such as I82.89 (other specified venous embolism and thrombosis) alongside codes for the causative bacterial infection (e.g., B96.81 or A40-A41 for sepsis), while ICD-9-CM relied on 453.8 or 041.89.

What exactly is Lemierre's syndrome?

Often referred to as the "forgotten disease," Lemierre's syndrome is a rare but life-threatening complication typically following a bacterial pharyngitis or tonsillitis. The condition is characterized by the formation of a septic thrombus in the internal jugular vein, which can then spread bacteria throughout the bloodstream, leading to metastatic abscesses in distant organs such as the lungs, joints, or liver. Because Lemierre's syndrome presents with nonspecific symptoms like high fever, sore throat, and neck pain, it is frequently misdiagnosed in its early stages.

How is Lemierre's syndrome diagnosed and coded?

Because there is no single ICD code for Lemierre's syndrome, medical billing requires a combination of codes to accurately capture the clinical picture. A physician must code for the thrombophlebitis of the internal jugular vein (I82.89 in ICD-10) and the specific pathogen identified—most commonly the anaerobic bacterium Fusobacterium necrophorum. Diagnostic confirmation typically involves a contrast-enhanced CT scan of the neck and chest to visualize the vein thrombosis and any secondary pulmonary emboli or abscesses. Among the 132 members of the Lemierre's syndrome community at DiseaseMaps.org, many report that diagnostic delay was a significant challenge due to the rarity of the condition.

What are the clinical indicators of Lemierre's syndrome?

Identifying Lemierre's syndrome requires a high index of suspicion, especially in otherwise healthy adolescents or young adults who present with a severe sore throat that does not respond to standard antibiotics. The clinical progression often follows a distinct pattern:

• Initial oropharyngeal infection (pharyngitis or tonsillitis).


• Development of septic thrombophlebitis of the internal jugular vein.


• Systemic inflammatory response, often manifesting as high, spiking fevers.


• Metastatic infection, most commonly affecting the lungs (present in approximately 80-90% of cases).


• Neck swelling or tenderness along the sternocleidomastoid muscle.

Is Lemierre's syndrome hereditary?

Lemierre's syndrome is not a hereditary or genetic condition. It is an acquired infectious disease caused by the invasion of bacteria into the deep tissues of the neck. While individual immune responses may vary, there is no evidence that Lemierre's syndrome is passed through family lines. It is primarily an environmental and biological interaction between the pathogen and the host's current health status.

Next steps

• If you suspect you or a loved one has Lemierre's syndrome, seek emergency medical care immediately for imaging and blood cultures.


• Consult with an infectious disease specialist to ensure an appropriate, long-term antibiotic regimen is prescribed.


• Connect with the 132 members on DiseaseMaps.org to share experiences and find support from others who have navigated this rare diagnosis.


• Request copies of your CT scan reports and laboratory culture results to maintain a personal medical file for your recovery journey.

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 or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Lemierre Syndrome Overview.


• Orphanet: Rare Diseases Database - Lemierre Syndrome.


• PubMed: "Lemierre's syndrome: A forgotten disease" (Clinical Review).


• DiseaseMaps.org: Community insights and patient-reported data on Lemierre's syndrome.