2026 ICD-10-CM Diagnosis Code Z20.811Contact with and (suspected) exposure to meningococcus

ICD-10-CM Codes›Z00–Z99›Z20-Z29›suspected

ICD-10-CM Z20.811
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z20.811 is a billable ICD-10-CM diagnosis code for contact with and (suspected) exposure to meningococcus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as exposure to invasive meningococcal disease. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Exposure, encounters, screening or contact with infectious disease.

Code Identity

ICD-10-CM Code
Z20.811
Billable Status
Yes — Valid for Submission
Code Describes
Contact with and (suspected) exposure to meningococcus
Short Description
Contact with and (suspected) exposure to meningococcus
Same as the full description in the CMS dataset.
Parent Code
Z20.81
Contact with and (suspected) exposure to other bacterial communicable diseases

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ20-Z29Persons with potential health hazards related to communicable diseases
CategorysuspectedContact with and exposure to communicable diseases (Z20)
This CodeZ20.811Contact with and (suspected) exposure to meningococcus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Exposure to invasive meningococcal disease
  • Exposure to meningitis
  • Exposure to Neisseria meningitidis
  • Suspected meningococcemia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Contact(with)
      • meningococcus
    • Exposure(to)
      • meningococcus

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC016
Exposure, encounters, screening or contact with infectious disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Meningococcal Disease

Meningococcal disease is the name for any illness that is caused by Neisseria meningitidis bacteria (also called meningococcal bacteria). These illnesses are often severe and can sometimes be deadly. They include infections of the lining of the brain and spinal cord (meningitis) and in the bloodstream (sepsis).

The full article covers:

  • What is meningococcal disease?
  • What causes meningococcal disease?
  • Who is more likely to get meningococcal disease?
  • What are the symptoms of meningococcal disease?
  • How is meningococcal disease diagnosed?
  • What are the treatments for meningococcal disease?
  • Can meningococcal disease be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Z20.811 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V01.84 Meningococcus contact
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z20.811Overview

Is Z20.811 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report contact with and (suspected) exposure to meningococcus on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of Z20.811?

Under the General Equivalence Mappings, contact with and (suspected) exposure to meningococcus converts to ICD-9-CM V01.84 (meningococcus contact). The mapping is a direct match.