ICD-10 · PDGM grouping
H20 Iridocyclitis
All 38 codes in the H20 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
38
Can lead a claim
29
Cannot lead a claim
9
What CMS assigns to H20
29 of the 38 codes group to MMTA - Other; 9 are assigned no clinical group. None of the 38 is assigned a comorbidity subgroup. 29 of the 38 can lead a claim.
Every code in H20
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 |
|---|---|---|---|---|
| H20.0 Acute and subacute iridocyclitis | ||||
| H20.00 | Unspecified acute and subacute iridocyclitis | Can lead a claim | A | None |
| H20.01 Primary iridocyclitis | ||||
| H20.011 | Primary iridocyclitis, right eye | Can lead a claim | A | None |
| H20.012 | Primary iridocyclitis, left eye | Can lead a claim | A | None |
| H20.013 | Primary iridocyclitis, bilateral | Can lead a claim | A | None |
| H20.019 | Primary iridocyclitis, unspecified eye | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| H20.02 Recurrent acute iridocyclitis | ||||
| H20.021 | Recurrent acute iridocyclitis, right eye | Can lead a claim | A | None |
| H20.022 | Recurrent acute iridocyclitis, left eye | Can lead a claim | A | None |
| H20.023 | Recurrent acute iridocyclitis, bilateral | Can lead a claim | A | None |
| H20.029 | Recurrent acute iridocyclitis, unspecified eye | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| H20.03 Secondary infectious iridocyclitis | ||||
| H20.031 | Secondary infectious iridocyclitis, right eye | Can lead a claim | A | None |
| H20.032 | Secondary infectious iridocyclitis, left eye | Can lead a claim | A | None |
| H20.033 | Secondary infectious iridocyclitis, bilateral | Can lead a claim | A | None |
| H20.039 | Secondary infectious iridocyclitis, unspecified eye | Cannot lead a claimUnspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition | None | None |
| H20.04 Secondary noninfectious iridocyclitis | ||||
| H20.041 | Secondary noninfectious iridocyclitis, right eye | Can lead a claim | A | None |
| H20.042 | Secondary noninfectious iridocyclitis, left eye | Can lead a claim | A | None |
| H20.043 | Secondary noninfectious iridocyclitis, bilateral | Can lead a claim | A | None |
| H20.049 | Secondary noninfectious iridocyclitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H20.05 Hypopyon | ||||
| H20.051 | Hypopyon, right eye | Can lead a claim | A | None |
| H20.052 | Hypopyon, left eye | Can lead a claim | A | None |
| H20.053 | Hypopyon, bilateral | Can lead a claim | A | None |
| H20.059 | Hypopyon, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H20.1 Chronic iridocyclitis | ||||
| H20.10 | Chronic iridocyclitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H20.11 | Chronic iridocyclitis, right eye | Can lead a claim | A | None |
| H20.12 | Chronic iridocyclitis, left eye | Can lead a claim | A | None |
| H20.13 | Chronic iridocyclitis, bilateral | Can lead a claim | A | None |
| H20.2 Lens-induced iridocyclitis | ||||
| H20.20 | Lens-induced iridocyclitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H20.21 | Lens-induced iridocyclitis, right eye | Can lead a claim | A | None |
| H20.22 | Lens-induced iridocyclitis, left eye | Can lead a claim | A | None |
| H20.23 | Lens-induced iridocyclitis, bilateral | Can lead a claim | A | None |
| H20.8 Other iridocyclitis | ||||
| H20.81 Fuchs' heterochromic cyclitis | ||||
| H20.811 | Fuchs' heterochromic cyclitis, right eye | Can lead a claim | A | None |
| H20.812 | Fuchs' heterochromic cyclitis, left eye | Can lead a claim | A | None |
| H20.813 | Fuchs' heterochromic cyclitis, bilateral | Can lead a claim | A | None |
| H20.819 | Fuchs' heterochromic cyclitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H20.82 Vogt-Koyanagi syndrome | ||||
| H20.821 | Vogt-Koyanagi syndrome, right eye | Can lead a claim | A | None |
| H20.822 | Vogt-Koyanagi syndrome, left eye | Can lead a claim | A | None |
| H20.823 | Vogt-Koyanagi syndrome, bilateral | Can lead a claim | A | None |
| H20.829 | Vogt-Koyanagi syndrome, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H20.9 | Unspecified iridocyclitis | 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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