ICD-10-CM 2027
ICD-10 code for carrier of meningococcus
From the official ICD-10-CM alphabetic index entry “Meningococcus, meningococcal › carrier (suspected) of”. Page updated September 29, 2026.
About coding carrier of meningococcus
The ICD-10-CM code for carrier of meningococcus is Z22.31 (Carrier of bacterial disease due to meningococci).
Within Z22.3 (carrier of other specified bacterial diseases), Z22.31 is specifically for carrier of bacterial disease due to meningococci. Related codes cover bacterial disease due to staphylococci (Z22.32), bacterial disease due to streptococci (Z22.33), Acinetobacter baumannii (Z22.34), Enterobacterales (Z22.35) and other specified bacterial diseases (Z22.39).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about carrier of meningococcus ICD-10 codes
What is the ICD-10 code for carrier of meningococcus?
- Z22.31 — Carrier of bacterial disease due to meningococci.
Is Z22.31 billable?
- Yes. Z22.31 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z22.31 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z22.31 a CC or MCC?
- No. Z22.31 is neither a CC nor an MCC under MS-DRG v44.0.