ICD-10 A02.22
Billable / Specific HCC v28: 115 MCCSalmonella pneumonia
About ICD-10-CM A02.22
ICD-10-CM code A02.22 represents Salmonella pneumonia. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block A02). The 2026 edition of ICD-10-CM A02.22 became effective on October 1, 2025.
Coding Tips for A02.22
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
A02.22 is a CMS-HCC v28 risk-adjustment code (category 115). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
A02.22 is designated MCC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-MCC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag MCC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Inpatient DRG Impact, MCC
codes Salmonella pneumonia. As a Major Complication/Comorbidity (MCC), this can shift the DRG assignment to a higher-weighted category, substantial reimbursement impact.
Medicare LCD Coverage for A02.22
Local Coverage Determinations (LCDs) from CMS MACs that list A02.22 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 A02.22.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but A02.22 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with A02.22
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 A02.22 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 |
|---|---|---|
| A02.22 | 00322 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To A02.22
Other codes in section A00-A09 (Intestinal infectious diseases).
ICD-10 A02.22, Billing FAQ
Is ICD-10 code A02.22 billable? +
Yes, A02.22 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does A02.22 affect Medicare Advantage HCC risk adjustment? +
Yes. A02.22 maps to CMS-HCC v28 category 115. Capture this diagnosis annually for accurate Medicare Advantage risk score.
Is A02.22 a CC or MCC for inpatient DRG? +
Yes, this code is designated as MCC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does A02.22 map to? +
Per CMS GEMs, A02.22 maps to ICD-9 codes: 00322. 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 June 1, 2026.
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