ICD-10 · PDGM grouping
I26-I28 — Pulmonary heart disease and diseases of pulmonary circulation
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
Codes in range
33
No clinical group
5
A period cannot be grouped from these.
Barred as primary
4
CMS rejects these in the primary position.
Where these codes group
28 of the 33 codes in I26-I28 group to MMTA - Cardiac and Circulatory. A further 5 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in I26-I28
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
Every code in I26-I28
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| I2601 | Septic pulmonary embolism with acute cor pulmonale | None | Cannot lead a claim |
| I2602 | Saddle embolus of pulmonary artery with acute cor pulmonale | H | Can lead a claim |
| I2603 | Cement embolism of pulmonary artery with acute cor pulmonale | None | Cannot lead a claim |
| I2604 | Fat embolism of pulmonary artery with acute cor pulmonale | H | Can lead a claim, code first applies |
| I2609 | Other pulmonary embolism with acute cor pulmonale | H | Can lead a claim |
| I2690 | Septic pulmonary embolism without acute cor pulmonale | None | Cannot lead a claim |
| I2692 | Saddle embolus of pulmonary artery w/o acute cor pulmonale | H | Can lead a claim |
| I2693 | Sing subsegmental throm pulm emblsm w/o acute cor pulmonale | H | Can lead a claim |
| I2694 | Mult subsegmental throm pulm emboli w/o acute cor pulmonale | H | Can lead a claim |
| I2695 | Cement embolism of pulm artery without acute cor pulmonale | None | Cannot lead a claim |
| I2696 | Fat embolism of pulmonary artery without acute cor pulmonale | H | Can lead a claim, code first applies |
| I2699 | Other pulmonary embolism without acute cor pulmonale | H | Can lead a claim |
| I270 | Primary pulmonary hypertension | H | Can lead a claim |
| I271 | Kyphoscoliotic heart disease | H | Can lead a claim |
| I2720 | Pulmonary hypertension, unspecified | H | Can lead a claim |
| I2721 | Secondary pulmonary arterial hypertension | H | Can lead a claim |
| I2722 | Pulmonary hypertension due to left heart disease | H | Can lead a claim |
| I2723 | Pulmonary hypertension due to lung diseases and hypoxia | H | Can lead a claim |
| I2724 | Chronic thromboembolic pulmonary hypertension | H | Can lead a claim |
| I2729 | Other secondary pulmonary hypertension | H | Can lead a claim |
| I2781 | Cor pulmonale (chronic) | H | Can lead a claim |
| I2782 | Chronic pulmonary embolism | H | Can lead a claim |
| I2783 | Eisenmenger's syndrome | H | Can lead a claim |
| I27840 | Fontan-associated liver disease [FALD] | None | Cannot lead a claim |
| I27841 | Fontan-associated lymphatic dysfunction | H | Can lead a claim |
| I27848 | Other Fontan-associated condition | H | Can lead a claim |
| I27849 | Fontan related circulation, unspecified | H | Can lead a claim |
| I2789 | Other specified pulmonary heart diseases | H | Can lead a claim |
| I279 | Pulmonary heart disease, unspecified | H | Can lead a claim |
| I280 | Arteriovenous fistula of pulmonary vessels | H | Can lead a claim |
| I281 | Aneurysm of pulmonary artery | H | Can lead a claim |
| I288 | Other diseases of pulmonary vessels | H | Can lead a claim |
| I289 | Disease of pulmonary vessels, unspecified | H | Can lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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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