ICD-10 · PDGM grouping
I48 Atrial fibrillation and flutter
All 9 codes in the I48 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
9
Can lead a claim
9
Cannot lead a claim
0
What CMS assigns to I48
All 9 codes group to MMTA - Cardiac and Circulatory. All 9 count toward the Dysrhythmias, includes Atrial fibrillation and Atrial flutter comorbidity subgroup. Every code can lead a claim.
- Dysrhythmias, includes Atrial fibrillation and Atrial flutter: can award the low comorbidity tier as a secondary diagnosis.
Every code in I48
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 |
|---|---|---|---|---|
| I48.0 | Paroxysmal atrial fibrillation | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.1 Persistent atrial fibrillation | ||||
| I48.11 | Longstanding persistent atrial fibrillation | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.19 | Other persistent atrial fibrillation | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.2 Chronic atrial fibrillation | ||||
| I48.20 | Chronic atrial fibrillation, unspecified | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.21 | Permanent atrial fibrillation | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.3 | Typical atrial flutter | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.4 | Atypical atrial flutter | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.9 Unspecified atrial fibrillation and atrial flutter | ||||
| I48.91 | Unspecified atrial fibrillation | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| I48.92 | Unspecified atrial flutter | Can lead a claim | H | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
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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