J45.40

Billable

Moderate persistent asthma, uncomplicated

HCC Category Mapping

RxHCCHCC 229 — COPD and Chronic Bronchitis

0.000

What This Code Means

Moderate persistent asthma without any current complications or exacerbations.

Coding Tips

•Use this code only when asthma is documented as moderate persistent and there is no acute exacerbation or status asthmaticus
•Verify that the patient requires daily controller medications to distinguish moderate from mild persistent asthma

Clinical Significance

Moderate persistent asthma, uncomplicated indicates asthma with daily symptoms, nighttime awakenings more than once per week (but not nightly), and some limitation of normal activity. This represents a significant step up in disease burden requiring daily controller therapy with medium-dose inhaled corticosteroids, though it still does not map to CMS-HCC in V24 or V28.

Documentation Requirements

✓Asthma diagnosis with severity explicitly classified as moderate persistent
✓Symptom frequency: daily symptoms, nighttime awakenings >1x/week but not nightly
✓Some limitation in normal activity documented
✓Daily controller medications: medium-dose inhaled corticosteroid ± long-acting beta-agonist
✓Lung function: FEV1 60-80% predicted if documented
✓Documentation of uncomplicated status (no current exacerbation)

Commonly Confused Codes

J45.30 — Mild persistent asthma: symptoms >2 days/week but not daily; less severe J45.50 — Severe persistent asthma: symptoms throughout the day, extremely limited activity; more severe and maps to V28 HCC J45.41 — Moderate persistent asthma with acute exacerbation: use during acute worsening J45.909 — Unspecified asthma: always prefer severity-classified codes

Code Hierarchy

└J45Asthma └J45.4Moderate persistent asthma └J45.40Moderate persistent asthma, uncomplicated

└J45.40Moderate persistent asthma, uncomplicated