ICD-10 Z99.11
Billable / Specific HCC v28: 82 CCDependence on respirator [ventilator] status
About ICD-10-CM Z99.11
ICD-10-CM code Z99.11 represents Dependence on respirator [ventilator] status. This is a billable/specific code in the Factors Influencing Health Status chapter (block Z99). The 2026 edition of ICD-10-CM Z99.11 became effective on October 1, 2025.
Coding Tips for Z99.11
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Z99.11 is a CMS-HCC v28 risk-adjustment code (category 82). 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.
Z99.11 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Z99.11. Per CMS ICD-10-CM Tabular 2026.
- Ventilator status
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, CC
codes Dependence on respirator [ventilator] status. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for Z99.11
Local Coverage Determinations (LCDs) from CMS MACs that list Z99.11 as a covered diagnosis.
Showing top 10 of 70 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Z99.11.
3 Aetna
2 Medicare
CPT Codes Commonly Billed with Z99.11
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 Z99.11 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 |
|---|---|---|
| Z99.11 | V4611 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To Z99.11
Other codes in section Z77-Z99 (Persons with potential health hazards related to family and personal history and certain conditions influencing health status).
ICD-10 Z99.11, Billing FAQ
Is ICD-10 code Z99.11 billable? +
Yes, Z99.11 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 Z99.11? +
ICD-10 Z99.11 includes: Ventilator status.
Does Z99.11 affect Medicare Advantage HCC risk adjustment? +
Yes. Z99.11 maps to CMS-HCC v28 category 82. Capture this diagnosis annually for accurate Medicare Advantage risk score.
Is Z99.11 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does Z99.11 map to? +
Per CMS GEMs, Z99.11 maps to ICD-9 codes: V4611. 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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