What is the ICD-10 code for MSSA infection?

The ICD-10 code for MSSA infection is B95.61, used when MSSA is the causative agent of diseases classified elsewhere.

How do you code MSSA sepsis?

For MSSA sepsis, use A41.01 as the primary code and B95.61 as the secondary code to specify MSSA as the causative organism.

Can MSSA be a principal diagnosis?

No, B95.61 for MSSA cannot be used as a principal diagnosis; it must be sequenced after the primary condition code.

ICD-10 Coding for MSSA Infection(B95.61, A41.01, A41.02)

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Learn about MSSA infection coding with ICD-10, including primary and secondary codes, documentation requirements, and common pitfalls.

Also known as:

Methicillin-Susceptible Staphylococcus AureusStaph aureus infection

Related ICD-10 Code Ranges

Complete code families applicable to MSSA Infection

A00-B99Primary Range

Certain infectious and parasitic diseases

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
B95.61	Methicillin susceptible Staphylococcus aureus as the cause of diseases classified elsewhere	Use when MSSA is identified as the causative organism for another condition.	Positive culture for MSSA Documentation of MSSA as causative agent
Z22.321	Carrier of methicillin-susceptible Staphylococcus aureus	Use for documenting carrier status in the absence of active infection.	Positive nasal swab for MSSA No active infection present
A41.01	Sepsis due to methicillin susceptible Staphylococcus aureus	Use as the primary code for sepsis cases caused by MSSA.	Blood cultures positive for MSSA Clinical signs of sepsis

Primary ICD-10-CM Codes

Methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere

B95.61Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Methicillin resistant Staphylococcus aureus as the cause of diseases classified elsewhereB95.62

Sepsis due to methicillin resistant Staphylococcus aureusA41.02

Documentation & Coding Risks

Avoid these common issues when documenting MSSA Infection.

Assuming sepsis without explicit documentation

Impact

Clinical: May lead to inappropriate treatment., Regulatory: Non-compliance with coding guidelines., Financial: Potential claim denials.

Mitigation

Ensure sepsis is documented by the physician, Verify clinical criteria are met

Using B95.61 as a primary diagnosis

Impact

Reimbursement: Incorrect sequencing can lead to claim denials., Compliance: Violates ICD-10 coding guidelines., Data Quality: Affects accuracy of clinical data.

Mitigation

Always sequence B95.61 after the primary condition code.

Omitting Z22.321 in known carriers with active infection

Impact

Reimbursement: May affect DRG assignment., Compliance: Incomplete coding of patient status., Data Quality: Inaccurate representation of patient condition.

Mitigation

Include Z22.321 alongside active infection codes.

MSSA Carrier Status Documentation

Impact

Failure to document carrier status can lead to incomplete coding.

Mitigation

Ensure carrier status is documented and coded when applicable.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with B95.61.

Primary Code

B95.61

Methicillin susceptible Staphylococcus aureus infection as the cause of diseases classified elsewhere

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ICD-10 codes6

Coding risks4

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ICD-10 Coding for MSSA Infection(B95.61, A41.01, A41.02)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for MSSA infection?

How do you code MSSA sepsis?

Can MSSA be a principal diagnosis?

Related condition guides