Z99.12 Encounter for respirator [ventilator] dependence during power failure

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Excludes1 (never code together)

• mechanical complication of respirator [ventilator] (J95.850)

Applies from Z99.1 Dependence on respirator

Applicable to

• Dependence on ventilator

Risk adjustment (HCC)

• CMS-HCC V28: HCC 211 — Respirator Dependence/Tracheostomy Status/Complications
• CMS-HCC V22: HCC 82 — Respirator Dependence/Tracheostomy Status
• ESRD V24: HCC 82

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Approximate ICD-9-CM (GEMs)

• V46.12 Encounter for respirator dependence during power failure

Code annotations containing back-references to Z99.12

Back-references to Z99.12

• Type 1 Excludes: J95.850 Mechanical complication of respirator ("encounter for respirator [ventilator] dependence during power failure (Z99.12)")

Back-references to Z99

• Type 2 Excludes: Z74 Problems related to care provider dependency ("dependence on enabling machines or devices NEC (Z99.-)")
• Type 2 Excludes: Z78 Other specified health status ("postprocedural status (Z93-Z99)")

Diagnosis Index entries for Z99.12

• Admission (for) › respirator [ventilator] use during power failure
• Encounter (with health service) (for) › respirator [ventilator] use during power failure

Nearby codes

• Z99 Dependence on enabling machines and devices, not elsewhere classified
• Z99.0 Dependence on aspirator
• Z99.1 Dependence on respirator
• Z99.11 Dependence on respirator [ventilator] status
• Z99.12 Encounter for respirator [ventilator] dependence during power failure (this code)
• Z99.2 Dependence on renal dialysis
• Z99.3 Dependence on wheelchair
• Z99.8 Dependence on other enabling machines and devices
• Z99.81 Dependence on supplemental oxygen
• Z99.89 Dependence on other enabling machines and devices