ICD-10 · PDGM grouping
I27 Other pulmonary heart diseases
All 17 codes in the I27 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
17
Can lead a claim
16
Cannot lead a claim
1
What CMS assigns to I27
16 of the 17 codes group to MMTA - Cardiac and Circulatory; 1 is assigned no clinical group. Comorbidity subgroups: 13 toward Other Pulmonary Heart Diseases; 1 toward Other Disorders of the Liver; 3 are assigned none. 16 of the 17 can lead a claim.
- Other Pulmonary Heart Diseases: counts toward the high comorbidity tier only in an interaction pair.
- Other Disorders of the Liver
Every code in I27
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 |
|---|---|---|---|---|
| I27.0 | Primary pulmonary hypertension | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.1 | Kyphoscoliotic heart disease | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.2 Other secondary pulmonary hypertension | ||||
| I27.20 | Pulmonary hypertension, unspecified | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.21 | Secondary pulmonary arterial hypertension | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.22 | Pulmonary hypertension due to left heart disease | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.23 | Pulmonary hypertension due to lung diseases and hypoxia | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.24 | Chronic thromboembolic pulmonary hypertension | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.29 | Other secondary pulmonary hypertension | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.8 Other specified pulmonary heart diseases | ||||
| I27.81 | Cor pulmonale (chronic) | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.82 | Chronic pulmonary embolism | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.83 | Eisenmenger's syndrome | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.84 Fontan related circulation | ||||
| I27.840 | Fontan-associated liver disease [FALD] | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Other Disorders of the Liver |
| I27.841 | Fontan-associated lymphatic dysfunction | Can lead a claim | H | None |
| I27.848 | Other Fontan-associated condition | Can lead a claim | H | None |
| I27.849 | Fontan related circulation, unspecified | Can lead a claim | H | None |
| I27.89 | Other specified pulmonary heart diseases | Can lead a claim | H | Other Pulmonary Heart Diseases |
| I27.9 | Pulmonary heart disease, unspecified | Can lead a claim | H | Other Pulmonary Heart Diseases |
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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