ICD-10 · PDGM grouping
R00 Abnormalities of heart beat
All 5 codes in the R00 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
5
Can lead a claim
0
Cannot lead a claim
5
What CMS assigns to R00
None of the 5 codes is assigned a clinical group. 1 of the 5 counts toward the Dysrhythmias, includes Atrial fibrillation and Atrial flutter comorbidity subgroup; 4 are assigned none. None can lead a claim.
- Dysrhythmias, includes Atrial fibrillation and Atrial flutter: can award the low comorbidity tier as a secondary diagnosis.
Every code in R00
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 |
|---|---|---|---|---|
| R00.0 | Tachycardia, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R00.1 | Bradycardia, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Dysrhythmias, includes Atrial fibrillation and Atrial flutter |
| R00.2 | Palpitations | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R00.8 | Other abnormalities of heart beat | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| R00.9 | Unspecified abnormalities of heart beat | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | 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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