ICD-10 · PDGM grouping
I88 Nonspecific lymphadenitis
All 4 codes in the I88 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
4
Can lead a claim
3
Cannot lead a claim
1
What CMS assigns to I88
3 of the 4 codes group to MMTA - Cardiac and Circulatory; 1 is assigned no clinical group. None of the 4 is assigned a comorbidity subgroup. 3 of the 4 can lead a claim.
Every code in I88
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 |
|---|---|---|---|---|
| I88.0 | Nonspecific mesenteric lymphadenitis | Can lead a claim | H | None |
| I88.1 | Chronic lymphadenitis, except mesenteric | Can lead a claim | H | None |
| I88.8 | Other nonspecific lymphadenitis | Can lead a claim | H | None |
| I88.9 | Nonspecific lymphadenitis, unspecified | 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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