ICD-10 · PDGM grouping
H55 Nystagmus and other irregular eye movements
All 9 codes in the H55 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 H55
All 9 codes group to MMTA - Other. None of the 9 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in H55
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 |
|---|---|---|---|---|
| H55.0 Nystagmus | ||||
| H55.00 | Unspecified nystagmus | Can lead a claim | A | None |
| H55.01 | Congenital nystagmus | Can lead a claim | A | None |
| H55.02 | Latent nystagmus | Can lead a claim | A | None |
| H55.03 | Visual deprivation nystagmus | Can lead a claim | A | None |
| H55.04 | Dissociated nystagmus | Can lead a claim | A | None |
| H55.09 | Other forms of nystagmus | Can lead a claim | A | None |
| H55.8 Other irregular eye movements | ||||
| H55.81 | Deficient saccadic eye movements | Can lead a claim | A | None |
| H55.82 | Deficient smooth pursuit eye movements | Can lead a claim | A | None |
| H55.89 | Other irregular eye movements | Can lead a claim | A | 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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