ICD-10-CM 2027
ICD-10 code for streptococci carrier of
From the official ICD-10-CM alphabetic index entry “Carrier (suspected) of › streptococci”. Page updated September 29, 2026.
About coding streptococci carrier of
The ICD-10-CM code for streptococci carrier of is Z22.338 (Carrier of other streptococcus). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Z22.338.
Within Z22.33, choose Z22.338 (other streptococcus) only when documentation doesn't support a more specific option: group B streptococcus (Z22.330).
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.
More specific streptococci carrier of codes (official index)
Common questions about streptococci carrier of ICD-10 codes
What is the ICD-10 code for streptococci carrier of?
- Z22.338 — Carrier of other streptococcus. More specific codes apply when the documentation supports them: Z22.330, O99.82.
What is the ICD-10 code for group b streptococci carrier of?
- Z22.330 — Carrier of Group B streptococcus.
Is Z22.338 billable?
- Yes. Z22.338 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z22.338 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 Z22.338 a CC or MCC?
- No. Z22.338 is neither a CC nor an MCC under MS-DRG v44.0.