J45.30
BillableMild persistent asthma, uncomplicated
HCC Category Mapping
RxHCCHCC 229 — COPD and Chronic Bronchitis
0.000What This Code Means
Asthma that occurs regularly (several times per week) with mild symptoms and no current breathing problems.
Coding Tips
- •Mild persistent asthma indicates symptoms occur 3-4 days per week but nighttime symptoms are minimal (1-2 nights per month)
- •The 'uncomplicated' designation means no acute exacerbation is present; if exacerbation develops, use J45.31 instead
Clinical Significance
Mild persistent asthma, uncomplicated indicates asthma with symptoms occurring more than twice per week but not daily, with nighttime awakenings 3-4 times per month. This level of severity requires daily controller medication and represents a step up from intermittent disease, though it still does not reach the threshold for CMS-HCC mapping in V24 or V28.
Documentation Requirements
- ✓Asthma diagnosis with severity explicitly classified as mild persistent
- ✓Symptom frequency: >2 days/week but not daily, nighttime awakenings 3-4x/month
- ✓Minor limitation in normal activity documented
- ✓Daily controller medication prescribed (typically low-dose inhaled corticosteroid)
- ✓Lung function: FEV1 ≥80% predicted if documented
- ✓Documentation that the condition is currently uncomplicated (no exacerbation)
Commonly Confused Codes
J45.20 — Mild intermittent asthma: symptoms ≤2 days/week; less severe than persistentJ45.40 — Moderate persistent asthma: symptoms daily, nighttime awakenings >1x/week; more severeJ45.31 — Mild persistent asthma with acute exacerbation: use during an acute worseningJ45.909 — Unspecified asthma, uncomplicated: always prefer severity-classified codes when severity is documented
Code Hierarchy
└J45Asthma└J45.3Mild persistent asthma└J45.30Mild persistent asthma, uncomplicated
└J45.30Mild persistent asthma, uncomplicated