ICD-10 · PDGM grouping
H00 Hordeolum and chalazion
All 28 codes in the H00 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
28
Can lead a claim
16
Cannot lead a claim
12
What CMS assigns to H00
16 of the 28 codes group to MMTA - Other; 12 are assigned no clinical group. None of the 28 is assigned a comorbidity subgroup. 16 of the 28 can lead a claim.
Every code in H00
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 |
|---|---|---|---|---|
| H00.0 Hordeolum (externum) (internum) of eyelid | ||||
| H00.01 Hordeolum externum | ||||
| H00.011 | Hordeolum externum right upper eyelid | Can lead a claim | A | None |
| H00.012 | Hordeolum externum right lower eyelid | Can lead a claim | A | None |
| H00.013 | Hordeolum externum right eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.014 | Hordeolum externum left upper eyelid | Can lead a claim | A | None |
| H00.015 | Hordeolum externum left lower eyelid | Can lead a claim | A | None |
| H00.016 | Hordeolum externum left eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.019 | Hordeolum externum unspecified eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.02 Hordeolum internum | ||||
| H00.021 | Hordeolum internum right upper eyelid | Can lead a claim | A | None |
| H00.022 | Hordeolum internum right lower eyelid | Can lead a claim | A | None |
| H00.023 | Hordeolum internum right eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.024 | Hordeolum internum left upper eyelid | Can lead a claim | A | None |
| H00.025 | Hordeolum internum left lower eyelid | Can lead a claim | A | None |
| H00.026 | Hordeolum internum left eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.029 | Hordeolum internum unspecified eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.03 Abscess of eyelid | ||||
| H00.031 | Abscess of right upper eyelid | Can lead a claim | A | None |
| H00.032 | Abscess of right lower eyelid | Can lead a claim | A | None |
| H00.033 | Abscess of eyelid right eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.034 | Abscess of left upper eyelid | Can lead a claim | A | None |
| H00.035 | Abscess of left lower eyelid | Can lead a claim | A | None |
| H00.036 | Abscess of eyelid left eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.039 | Abscess of eyelid unspecified eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.1 Chalazion | ||||
| H00.11 | Chalazion right upper eyelid | Can lead a claim | A | None |
| H00.12 | Chalazion right lower eyelid | Can lead a claim | A | None |
| H00.13 | Chalazion right eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.14 | Chalazion left upper eyelid | Can lead a claim | A | None |
| H00.15 | Chalazion left lower eyelid | Can lead a claim | A | None |
| H00.16 | Chalazion left eye, unspecified eyelid | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H00.19 | Chalazion unspecified eye, unspecified eyelid | 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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