Z22.321 – Carrier or suspected carrier of Methicillin susceptible Staphylococcus aureus

ICD-10-CM 2027 diagnosis code · Persons with potential health hazards related to communicable diseases

Billable code

ICD-10-CM code Z22.321

Code: Z22.321 (claims format: Z22321)
Description: Carrier or suspected carrier of Methicillin susceptible Staphylococcus aureus
Short description: Carrier or suspected carrier of methicillin suscep staph
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z20-Z29 Persons with potential health hazards related to communicable diseases
Parent codes: Z22 › Z22.3 › Z22.32

Notes for Z22.321

Applicable to:

MSSA colonization

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Z22 – Carrier of infectious disease

Includes:

colonization status
suspected carrier

Excludes2 (not included here):

carrier of viral hepatitis (B18.-)

Index terms for Z22.321

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in Z22.32

Z22.322 – Carrier or suspected carrier of Methicillin resistant Staphylococcus aureusBillable

Frequently asked questions

What is ICD-10 code Z22.321?

Z22.321 is the ICD-10-CM code for carrier or suspected carrier of Methicillin susceptible Staphylococcus aureus, in the block Z20-Z29 (Persons with potential health hazards related to communicable diseases).

Is Z22.321 a billable code?

Yes. Z22.321 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Z22.321 belong to?

It belongs to category Z22 – Carrier of infectious disease.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.