ICD-10 A49.01
Billable / SpecificMethicillin susceptible Staphylococcus aureus infection, unspecified site
About ICD-10-CM A49.01
ICD-10-CM code A49.01 represents Methicillin susceptible Staphylococcus aureus infection, unspecified site. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block A49). The 2026 edition of ICD-10-CM A49.01 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under A49.01. Per CMS ICD-10-CM Tabular 2026.
- Methicillin susceptible Staphylococcus aureus (MSSA) infection
- Staphylococcus aureus infection NOS
Medicare LCD Coverage for A49.01
Local Coverage Determinations (LCDs) from CMS MACs that list A49.01 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing A49.01.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but A49.01 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with A49.01
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert A49.01 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| A49.01 | 04111 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To A49.01
Other codes in section A30-A49 (Other bacterial diseases).
ICD-10 A49.01, Billing FAQ
Is ICD-10 code A49.01 billable? +
Yes, A49.01 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to A49.01? +
ICD-10 A49.01 includes: Methicillin susceptible Staphylococcus aureus (MSSA) infection; Staphylococcus aureus infection NOS.
What ICD-9 codes does A49.01 map to? +
Per CMS GEMs, A49.01 maps to ICD-9 codes: 04111. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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