ICD-10 · PDGM grouping
J45 Asthma
All 18 codes in the J45 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
18
Can lead a claim
18
Cannot lead a claim
0
What CMS assigns to J45
All 18 codes group to MMTA - Respiratory. All 18 count toward the Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis comorbidity subgroup. Every code can lead a claim.
- Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis: counts toward the high comorbidity tier only in an interaction pair.
Every code in J45
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| J45.2 Mild intermittent asthma | ||||
| J45.20 | Mild intermittent asthma, uncomplicated | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.21 | Mild intermittent asthma with (acute) exacerbation | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.22 | Mild intermittent asthma with status asthmaticus | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.3 Mild persistent asthma | ||||
| J45.30 | Mild persistent asthma, uncomplicated | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.31 | Mild persistent asthma with (acute) exacerbation | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.32 | Mild persistent asthma with status asthmaticus | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.4 Moderate persistent asthma | ||||
| J45.40 | Moderate persistent asthma, uncomplicated | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.41 | Moderate persistent asthma with (acute) exacerbation | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.42 | Moderate persistent asthma with status asthmaticus | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.5 Severe persistent asthma | ||||
| J45.50 | Severe persistent asthma, uncomplicated | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.51 | Severe persistent asthma with (acute) exacerbation | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.52 | Severe persistent asthma with status asthmaticus | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.9 Other and unspecified asthma | ||||
| J45.90 Unspecified asthma | ||||
| J45.901 | Unspecified asthma with (acute) exacerbation | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.902 | Unspecified asthma with status asthmaticus | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.909 | Unspecified asthma, uncomplicated | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.99 Other asthma | ||||
| J45.990 | Exercise induced bronchospasm | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.991 | Cough variant asthma | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
| J45.998 | Other asthma | Can lead a claim | L | Chronic Obstructive Pulmonary Disease, Asthma, and Bronchiectasis |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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