ICD-10 · PDGM grouping
I44 Atrioventricular and left bundle-branch block
All 10 codes in the I44 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
10
Can lead a claim
10
Cannot lead a claim
0
What CMS assigns to I44
All 10 codes group to MMTA - Cardiac and Circulatory. None of the 10 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in I44
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 |
|---|---|---|---|---|
| I44.0 | Atrioventricular block, first degree | Can lead a claim | H | None |
| I44.1 | Atrioventricular block, second degree | Can lead a claim | H | None |
| I44.2 | Atrioventricular block, complete | Can lead a claim | H | None |
| I44.3 Other and unspecified atrioventricular block | ||||
| I44.30 | Unspecified atrioventricular block | Can lead a claim | H | None |
| I44.39 | Other atrioventricular block | Can lead a claim | H | None |
| I44.4 | Left anterior fascicular block | Can lead a claim | H | None |
| I44.5 | Left posterior fascicular block | Can lead a claim | H | None |
| I44.6 Other and unspecified fascicular block | ||||
| I44.60 | Unspecified fascicular block | Can lead a claim | H | None |
| I44.69 | Other fascicular block | Can lead a claim | H | None |
| I44.7 | Left bundle-branch block, unspecified | Can lead a claim | H | 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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