ICD-10 · PDGM grouping
H16 Keratitis
All 126 codes in the H16 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.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
126
Can lead a claim
95
Cannot lead a claim
31
What CMS assigns to H16
95 of the 126 codes group to MMTA - Other; 31 are assigned no clinical group. None of the 126 is assigned a comorbidity subgroup. 95 of the 126 can lead a claim.
Every code in H16
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 |
|---|---|---|---|---|
| H16.0 Corneal ulcer | ||||
| H16.00 Unspecified corneal ulcer | ||||
| H16.001 | Unspecified corneal ulcer, right eye | Can lead a claim | A | None |
| H16.002 | Unspecified corneal ulcer, left eye | Can lead a claim | A | None |
| H16.003 | Unspecified corneal ulcer, bilateral | Can lead a claim | A | None |
| H16.009 | Unspecified corneal ulcer, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.01 Central corneal ulcer | ||||
| H16.011 | Central corneal ulcer, right eye | Can lead a claim | A | None |
| H16.012 | Central corneal ulcer, left eye | Can lead a claim | A | None |
| H16.013 | Central corneal ulcer, bilateral | Can lead a claim | A | None |
| H16.019 | Central corneal ulcer, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.02 Ring corneal ulcer | ||||
| H16.021 | Ring corneal ulcer, right eye | Can lead a claim | A | None |
| H16.022 | Ring corneal ulcer, left eye | Can lead a claim | A | None |
| H16.023 | Ring corneal ulcer, bilateral | Can lead a claim | A | None |
| H16.029 | Ring corneal ulcer, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.03 Corneal ulcer with hypopyon | ||||
| H16.031 | Corneal ulcer with hypopyon, right eye | Can lead a claim | A | None |
| H16.032 | Corneal ulcer with hypopyon, left eye | Can lead a claim | A | None |
| H16.033 | Corneal ulcer with hypopyon, bilateral | Can lead a claim | A | None |
| H16.039 | Corneal ulcer with hypopyon, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.04 Marginal corneal ulcer | ||||
| H16.041 | Marginal corneal ulcer, right eye | Can lead a claim | A | None |
| H16.042 | Marginal corneal ulcer, left eye | Can lead a claim | A | None |
| H16.043 | Marginal corneal ulcer, bilateral | Can lead a claim | A | None |
| H16.049 | Marginal corneal ulcer, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.05 Mooren's corneal ulcer | ||||
| H16.051 | Mooren's corneal ulcer, right eye | Can lead a claim | A | None |
| H16.052 | Mooren's corneal ulcer, left eye | Can lead a claim | A | None |
| H16.053 | Mooren's corneal ulcer, bilateral | Can lead a claim | A | None |
| H16.059 | Mooren's corneal ulcer, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.06 Mycotic corneal ulcer | ||||
| H16.061 | Mycotic corneal ulcer, right eye | Can lead a claim | A | None |
| H16.062 | Mycotic corneal ulcer, left eye | Can lead a claim | A | None |
| H16.063 | Mycotic corneal ulcer, bilateral | Can lead a claim | A | None |
| H16.069 | Mycotic corneal ulcer, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.07 Perforated corneal ulcer | ||||
| H16.071 | Perforated corneal ulcer, right eye | Can lead a claim | A | None |
| H16.072 | Perforated corneal ulcer, left eye | Can lead a claim | A | None |
| H16.073 | Perforated corneal ulcer, bilateral | Can lead a claim | A | None |
| H16.079 | Perforated corneal ulcer, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.1 Other and unspecified superficial keratitis without conjunctivitis | ||||
| H16.10 Unspecified superficial keratitis | ||||
| H16.101 | Unspecified superficial keratitis, right eye | Can lead a claim | A | None |
| H16.102 | Unspecified superficial keratitis, left eye | Can lead a claim | A | None |
| H16.103 | Unspecified superficial keratitis, bilateral | Can lead a claim | A | None |
| H16.109 | Unspecified superficial keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.11 Macular keratitis | ||||
| H16.111 | Macular keratitis, right eye | Can lead a claim | A | None |
| H16.112 | Macular keratitis, left eye | Can lead a claim | A | None |
| H16.113 | Macular keratitis, bilateral | Can lead a claim | A | None |
| H16.119 | Macular keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.12 Filamentary keratitis | ||||
| H16.121 | Filamentary keratitis, right eye | Can lead a claim | A | None |
| H16.122 | Filamentary keratitis, left eye | Can lead a claim | A | None |
| H16.123 | Filamentary keratitis, bilateral | Can lead a claim | A | None |
| H16.129 | Filamentary keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.13 Photokeratitis | ||||
| H16.131 | Photokeratitis, right eye | Can lead a claim | A | None |
| H16.132 | Photokeratitis, left eye | Can lead a claim | A | None |
| H16.133 | Photokeratitis, bilateral | Can lead a claim | A | None |
| H16.139 | Photokeratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.14 Punctate keratitis | ||||
| H16.141 | Punctate keratitis, right eye | Can lead a claim | A | None |
| H16.142 | Punctate keratitis, left eye | Can lead a claim | A | None |
| H16.143 | Punctate keratitis, bilateral | Can lead a claim | A | None |
| H16.149 | Punctate keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.2 Keratoconjunctivitis | ||||
| H16.20 Unspecified keratoconjunctivitis | ||||
| H16.201 | Unspecified keratoconjunctivitis, right eye | Can lead a claim | A | None |
| H16.202 | Unspecified keratoconjunctivitis, left eye | Can lead a claim | A | None |
| H16.203 | Unspecified keratoconjunctivitis, bilateral | Can lead a claim | A | None |
| H16.209 | Unspecified keratoconjunctivitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.21 Exposure keratoconjunctivitis | ||||
| H16.211 | Exposure keratoconjunctivitis, right eye | Can lead a claim | A | None |
| H16.212 | Exposure keratoconjunctivitis, left eye | Can lead a claim | A | None |
| H16.213 | Exposure keratoconjunctivitis, bilateral | Can lead a claim | A | None |
| H16.219 | Exposure keratoconjunctivitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.22 Keratoconjunctivitis sicca, not specified as Sjogren's | ||||
| H16.221 | Keratoconjunctivitis sicca, not specified as Sjogren's, right eyeCMS: Keratoconjunct sicca, not specified as Sjogren's, right eye | Can lead a claim | A | None |
| H16.222 | Keratoconjunctivitis sicca, not specified as Sjogren's, left eyeCMS: Keratoconjunct sicca, not specified as Sjogren's, left eye | Can lead a claim | A | None |
| H16.223 | Keratoconjunctivitis sicca, not specified as Sjogren's, bilateralCMS: Keratoconjunct sicca, not specified as Sjogren's, bilateral | Can lead a claim | A | None |
| H16.229 | Keratoconjunctivitis sicca, not specified as Sjogren's, unspecified eyeCMS: Keratoconjunct sicca, not specified as Sjogren's, unsp eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.23 Neurotrophic keratoconjunctivitis | ||||
| H16.231 | Neurotrophic keratoconjunctivitis, right eye | Can lead a claim | A | None |
| H16.232 | Neurotrophic keratoconjunctivitis, left eye | Can lead a claim | A | None |
| H16.233 | Neurotrophic keratoconjunctivitis, bilateral | Can lead a claim | A | None |
| H16.239 | Neurotrophic keratoconjunctivitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.24 Ophthalmia nodosa | ||||
| H16.241 | Ophthalmia nodosa, right eye | Can lead a claim | A | None |
| H16.242 | Ophthalmia nodosa, left eye | Can lead a claim | A | None |
| H16.243 | Ophthalmia nodosa, bilateral | Can lead a claim | A | None |
| H16.249 | Ophthalmia nodosa, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.25 Phlyctenular keratoconjunctivitis | ||||
| H16.251 | Phlyctenular keratoconjunctivitis, right eye | Can lead a claim | A | None |
| H16.252 | Phlyctenular keratoconjunctivitis, left eye | Can lead a claim | A | None |
| H16.253 | Phlyctenular keratoconjunctivitis, bilateral | Can lead a claim | A | None |
| H16.259 | Phlyctenular keratoconjunctivitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.26 Vernal keratoconjunctivitis, with limbar and corneal involvement | ||||
| H16.261 | Vernal keratoconjunctivitis, with limbar and corneal involvement, right eyeCMS: Vernal keratoconjunct, w limbar and corneal involv, r eye | Can lead a claim | A | None |
| H16.262 | Vernal keratoconjunctivitis, with limbar and corneal involvement, left eyeCMS: Vernal keratoconjunct, w limbar and corneal involv, left eye | Can lead a claim | A | None |
| H16.263 | Vernal keratoconjunctivitis, with limbar and corneal involvement, bilateralCMS: Vernal keratoconjunct, w limbar and corneal involv, bi | Can lead a claim | A | None |
| H16.269 | Vernal keratoconjunctivitis, with limbar and corneal involvement, unspecified eyeCMS: Vernal keratoconjunct, w limbar and corneal involv, unsp eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.29 Other keratoconjunctivitis | ||||
| H16.291 | Other keratoconjunctivitis, right eye | Can lead a claim | A | None |
| H16.292 | Other keratoconjunctivitis, left eye | Can lead a claim | A | None |
| H16.293 | Other keratoconjunctivitis, bilateral | Can lead a claim | A | None |
| H16.299 | Other keratoconjunctivitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.3 Interstitial and deep keratitis | ||||
| H16.30 Unspecified interstitial keratitis | ||||
| H16.301 | Unspecified interstitial keratitis, right eye | Can lead a claim | A | None |
| H16.302 | Unspecified interstitial keratitis, left eye | Can lead a claim | A | None |
| H16.303 | Unspecified interstitial keratitis, bilateral | Can lead a claim | A | None |
| H16.309 | Unspecified interstitial keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.31 Corneal abscess | ||||
| H16.311 | Corneal abscess, right eye | Can lead a claim | A | None |
| H16.312 | Corneal abscess, left eye | Can lead a claim | A | None |
| H16.313 | Corneal abscess, bilateral | Can lead a claim | A | None |
| H16.319 | Corneal abscess, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.32 Diffuse interstitial keratitis | ||||
| H16.321 | Diffuse interstitial keratitis, right eye | Can lead a claim | A | None |
| H16.322 | Diffuse interstitial keratitis, left eye | Can lead a claim | A | None |
| H16.323 | Diffuse interstitial keratitis, bilateral | Can lead a claim | A | None |
| H16.329 | Diffuse interstitial keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.33 Sclerosing keratitis | ||||
| H16.331 | Sclerosing keratitis, right eye | Can lead a claim | A | None |
| H16.332 | Sclerosing keratitis, left eye | Can lead a claim | A | None |
| H16.333 | Sclerosing keratitis, bilateral | Can lead a claim | A | None |
| H16.339 | Sclerosing keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.39 Other interstitial and deep keratitis | ||||
| H16.391 | Other interstitial and deep keratitis, right eye | Can lead a claim | A | None |
| H16.392 | Other interstitial and deep keratitis, left eye | Can lead a claim | A | None |
| H16.393 | Other interstitial and deep keratitis, bilateral | Can lead a claim | A | None |
| H16.399 | Other interstitial and deep keratitis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.4 Corneal neovascularization | ||||
| H16.40 Unspecified corneal neovascularization | ||||
| H16.401 | Unspecified corneal neovascularization, right eye | Can lead a claim | A | None |
| H16.402 | Unspecified corneal neovascularization, left eye | Can lead a claim | A | None |
| H16.403 | Unspecified corneal neovascularization, bilateral | Can lead a claim | A | None |
| H16.409 | Unspecified corneal neovascularization, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.41 Ghost vessels (corneal) | ||||
| H16.411 | Ghost vessels (corneal), right eye | Can lead a claim | A | None |
| H16.412 | Ghost vessels (corneal), left eye | Can lead a claim | A | None |
| H16.413 | Ghost vessels (corneal), bilateral | Can lead a claim | A | None |
| H16.419 | Ghost vessels (corneal), unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.42 Pannus (corneal) | ||||
| H16.421 | Pannus (corneal), right eye | Can lead a claim | A | None |
| H16.422 | Pannus (corneal), left eye | Can lead a claim | A | None |
| H16.423 | Pannus (corneal), bilateral | Can lead a claim | A | None |
| H16.429 | Pannus (corneal), unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.43 Localized vascularization of cornea | ||||
| H16.431 | Localized vascularization of cornea, right eye | Can lead a claim | A | None |
| H16.432 | Localized vascularization of cornea, left eye | Can lead a claim | A | None |
| H16.433 | Localized vascularization of cornea, bilateral | Can lead a claim | A | None |
| H16.439 | Localized vascularization of cornea, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.44 Deep vascularization of cornea | ||||
| H16.441 | Deep vascularization of cornea, right eye | Can lead a claim | A | None |
| H16.442 | Deep vascularization of cornea, left eye | Can lead a claim | A | None |
| H16.443 | Deep vascularization of cornea, bilateral | Can lead a claim | A | None |
| H16.449 | Deep vascularization of cornea, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H16.8 | Other keratitis | Can lead a claim | A | None |
| H16.9 | Unspecified keratitis | 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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