ICD-10 · PDGM grouping
J84 Other interstitial pulmonary diseases
All 24 codes in the J84 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
24
Can lead a claim
21
Cannot lead a claim
3
What CMS assigns to J84
21 of the 24 codes group to MMTA - Respiratory; 3 are assigned no clinical group. 5 of the 24 count toward the Bronchitis, Emphysema, and Interstitial Lung Disease comorbidity subgroup; 19 are assigned none. 21 of the 24 can lead a claim. CMS attaches a code-first note to 4 of the 24.
- Bronchitis, Emphysema, and Interstitial Lung Disease: counts toward the high comorbidity tier only in an interaction pair.
Code first
CMS grouper convention 90, on J84.03. Code first:
- disorders of iron metabolism (E83.1-)
- underlying disease, such as:
CMS grouper convention 91, on J84.170. Code first:
- lung diseases due to external agents (J60-J70)
- rheumatoid arthritis (M05.00-M06.9)
- sarcoidosis (D86.-)
- systemic connective tissue disorders (M30-M36)
- underlying disease, such as:
CMS grouper convention 92, on J84.178. Code first:
- progressive systemic sclerosis (M34.0)
- rheumatoid arthritis (M05.00-M06.9)
- systemic lupus erythematosis (M32.0-M32.9)
- underlying disease, such as:
CMS grouper convention 93, on J84.89. Code first:
- , if applicable:
- poisoning due to drug or toxin (T51-T65 with fifth or sixth character to indicate intent), for toxic pneumonopathy
- underlying cause of pneumonopathy, if known
Every code in J84
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 |
|---|---|---|---|---|
| J84.0 Alveolar and parieto-alveolar conditions | ||||
| J84.01 | Alveolar proteinosis | Can lead a claim | L | None |
| J84.02 | Pulmonary alveolar microlithiasis | Can lead a claim | L | None |
| J84.03 | Idiopathic pulmonary hemosiderosis | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| J84.09 | Other alveolar and parieto-alveolar conditions | Can lead a claim | L | None |
| J84.1 Other interstitial pulmonary diseases with fibrosis | ||||
| J84.10 | Pulmonary fibrosis, unspecified | Can lead a claim | L | Bronchitis, Emphysema, and Interstitial Lung Disease |
| J84.11 Idiopathic interstitial pneumonia | ||||
| J84.111 | Idiopathic interstitial pneumonia, not otherwise specified | Can lead a claim | L | None |
| J84.112 | Idiopathic pulmonary fibrosis | Can lead a claim | L | Bronchitis, Emphysema, and Interstitial Lung Disease |
| J84.113 | Idiopathic non-specific interstitial pneumonitis | Can lead a claim | L | None |
| J84.114 | Acute interstitial pneumonitis | Can lead a claim | L | None |
| J84.115 | Respiratory bronchiolitis interstitial lung disease | Can lead a claim | L | None |
| J84.116 | Cryptogenic organizing pneumonia | Can lead a claim | L | None |
| J84.117 | Desquamative interstitial pneumonia | Can lead a claim | L | None |
| J84.17 Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhere | ||||
| J84.170 | Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhereCMS: Interstit lung dis w progr fibrotic phenotype dis classd e | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | Bronchitis, Emphysema, and Interstitial Lung Disease |
| J84.178 | Other interstitial pulmonary diseases with fibrosis in diseases classified elsewhereCMS: Oth interstit pulmon dis with fibrosis in dis classd elswhr | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | Bronchitis, Emphysema, and Interstitial Lung Disease |
| J84.2 | Lymphoid interstitial pneumonia | Can lead a claim | L | None |
| J84.8 Other specified interstitial pulmonary diseases | ||||
| J84.81 | Lymphangioleiomyomatosis | Can lead a claim | L | None |
| J84.82 | Adult pulmonary Langerhans cell histiocytosis | Can lead a claim | L | None |
| J84.83 | Surfactant mutations of the lung | Can lead a claim | L | None |
| J84.84 Other interstitial lung diseases of childhood | ||||
| J84.841 | Neuroendocrine cell hyperplasia of infancy | Can lead a claim | L | None |
| J84.842 | Pulmonary interstitial glycogenosis | Can lead a claim | L | None |
| J84.843 | Alveolar capillary dysplasia with vein misalignment | Can lead a claim | L | None |
| J84.848 | Other interstitial lung diseases of childhood | Can lead a claim | L | None |
| J84.89 | Other specified interstitial pulmonary diseases | Can lead a claim, code first applies | L | Bronchitis, Emphysema, and Interstitial Lung Disease |
| J84.9 | Interstitial pulmonary disease, unspecified | Can lead a claim | L | None |
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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