ICD-10-CM category
H16: Keratitis
Codes under H16 (Keratitis). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| H16.0 | Corneal ulcer | — |
| H16.0 | Corneal ulcer | — |
| H16.00 | Unspecified corneal ulcer | — |
| H16.00 | Unspecified corneal ulcer | — |
| H16.001 | Unspecified corneal ulcer, right eye | ✓ |
| H16.001 | Unspecified corneal ulcer, right eye | ✓ |
| H16.01 | Central corneal ulcer | — |
| H16.01 | Central corneal ulcer | — |
| H16.1 | Other and unspecified superficial keratitis without conjunctivitis | — |
| H16.1 | Other and unspecified superficial keratitis without conjunctivitis | — |
| H16.002 | Unspecified corneal ulcer, left eye | ✓ |
| H16.002 | Unspecified corneal ulcer, left eye | ✓ |
| H16.02 | Ring corneal ulcer | — |
| H16.02 | Ring corneal ulcer | — |
| H16.2 | Keratoconjunctivitis | — |
| H16.2 | Keratoconjunctivitis | — |
| H16.003 | Unspecified corneal ulcer, bilateral | ✓ |
| H16.003 | Unspecified corneal ulcer, bilateral | ✓ |
| H16.03 | Corneal ulcer with hypopyon | — |
| H16.03 | Corneal ulcer with hypopyon | — |
| H16.3 | Interstitial and deep keratitis | — |
| H16.3 | Interstitial and deep keratitis | — |
| H16.04 | Marginal corneal ulcer | — |
| H16.04 | Marginal corneal ulcer | — |
| H16.4 | Corneal neovascularization | — |
| H16.4 | Corneal neovascularization | — |
| H16.05 | Mooren's corneal ulcer | — |
| H16.05 | Mooren's corneal ulcer | — |
| H16.06 | Mycotic corneal ulcer | — |
| H16.06 | Mycotic corneal ulcer | — |
| H16.07 | Perforated corneal ulcer | — |
| H16.07 | Perforated corneal ulcer | — |
| H16.8 | Other keratitis | ✓ |
| H16.8 | Other keratitis | ✓ |
| H16.009 | Unspecified corneal ulcer, unspecified eye | ✓ |
| H16.009 | Unspecified corneal ulcer, unspecified eye | ✓ |
| H16.9 | Unspecified keratitis | ✓ |
| H16.9 | Unspecified keratitis | ✓ |
| H16.10 | Unspecified superficial keratitis | — |
| H16.10 | Unspecified superficial keratitis | — |
| H16.011 | Central corneal ulcer, right eye | ✓ |
| H16.011 | Central corneal ulcer, right eye | ✓ |
| H16.11 | Macular keratitis | — |
| H16.11 | Macular keratitis | — |
| H16.012 | Central corneal ulcer, left eye | ✓ |
| H16.012 | Central corneal ulcer, left eye | ✓ |
| H16.12 | Filamentary keratitis | — |
| H16.12 | Filamentary keratitis | — |
| H16.013 | Central corneal ulcer, bilateral | ✓ |
| H16.013 | Central corneal ulcer, bilateral | ✓ |
| H16.13 | Photokeratitis | — |
| H16.13 | Photokeratitis | — |
| H16.14 | Punctate keratitis | — |
| H16.14 | Punctate keratitis | — |
| H16.019 | Central corneal ulcer, unspecified eye | ✓ |
| H16.019 | Central corneal ulcer, unspecified eye | ✓ |
| H16.20 | Unspecified keratoconjunctivitis | — |
| H16.20 | Unspecified keratoconjunctivitis | — |
| H16.021 | Ring corneal ulcer, right eye | ✓ |
| H16.021 | Ring corneal ulcer, right eye | ✓ |
| H16.21 | Exposure keratoconjunctivitis | — |
| H16.21 | Exposure keratoconjunctivitis | — |
| H16.022 | Ring corneal ulcer, left eye | ✓ |
| H16.022 | Ring corneal ulcer, left eye | ✓ |
| H16.22 | Keratoconjunctivitis sicca, not specified as Sjogren's | — |
| H16.22 | Keratoconjunctivitis sicca, not specified as Sjogren's | — |
| H16.023 | Ring corneal ulcer, bilateral | ✓ |
| H16.023 | Ring corneal ulcer, bilateral | ✓ |
| H16.23 | Neurotrophic keratoconjunctivitis | — |
| H16.23 | Neurotrophic keratoconjunctivitis | — |
| H16.24 | Ophthalmia nodosa | — |
| H16.24 | Ophthalmia nodosa | — |
| H16.25 | Phlyctenular keratoconjunctivitis | — |
| H16.25 | Phlyctenular keratoconjunctivitis | — |
| H16.26 | Vernal keratoconjunctivitis, with limbar and corneal involvement | — |
| H16.26 | Vernal keratoconjunctivitis, with limbar and corneal involvement | — |
| H16.029 | Ring corneal ulcer, unspecified eye | ✓ |
| H16.029 | Ring corneal ulcer, unspecified eye | ✓ |
| H16.29 | Other keratoconjunctivitis | — |
| H16.29 | Other keratoconjunctivitis | — |
| H16.30 | Unspecified interstitial keratitis | — |
| H16.30 | Unspecified interstitial keratitis | — |
| H16.031 | Corneal ulcer with hypopyon, right eye | ✓ |
| H16.031 | Corneal ulcer with hypopyon, right eye | ✓ |
| H16.31 | Corneal abscess | — |
| H16.31 | Corneal abscess | — |
| H16.032 | Corneal ulcer with hypopyon, left eye | ✓ |
| H16.032 | Corneal ulcer with hypopyon, left eye | ✓ |
| H16.32 | Diffuse interstitial keratitis | — |
| H16.32 | Diffuse interstitial keratitis | — |
| H16.033 | Corneal ulcer with hypopyon, bilateral | ✓ |
| H16.033 | Corneal ulcer with hypopyon, bilateral | ✓ |
| H16.33 | Sclerosing keratitis | — |
| H16.33 | Sclerosing keratitis | — |
| H16.039 | Corneal ulcer with hypopyon, unspecified eye | ✓ |
| H16.039 | Corneal ulcer with hypopyon, unspecified eye | ✓ |
| H16.39 | Other interstitial and deep keratitis | — |
| H16.39 | Other interstitial and deep keratitis | — |
| H16.40 | Unspecified corneal neovascularization | — |
| H16.40 | Unspecified corneal neovascularization | — |
| H16.041 | Marginal corneal ulcer, right eye | ✓ |
| H16.041 | Marginal corneal ulcer, right eye | ✓ |
| H16.41 | Ghost vessels (corneal) | — |
| H16.41 | Ghost vessels (corneal) | — |
| H16.042 | Marginal corneal ulcer, left eye | ✓ |
| H16.042 | Marginal corneal ulcer, left eye | ✓ |
| H16.42 | Pannus (corneal) | — |
| H16.42 | Pannus (corneal) | — |
| H16.043 | Marginal corneal ulcer, bilateral | ✓ |
| H16.043 | Marginal corneal ulcer, bilateral | ✓ |
| H16.43 | Localized vascularization of cornea | — |
| H16.43 | Localized vascularization of cornea | — |
| H16.44 | Deep vascularization of cornea | — |
| H16.44 | Deep vascularization of cornea | — |
| H16.049 | Marginal corneal ulcer, unspecified eye | ✓ |
| H16.049 | Marginal corneal ulcer, unspecified eye | ✓ |
| H16.051 | Mooren's corneal ulcer, right eye | ✓ |
| H16.051 | Mooren's corneal ulcer, right eye | ✓ |
| H16.052 | Mooren's corneal ulcer, left eye | ✓ |
| H16.052 | Mooren's corneal ulcer, left eye | ✓ |
| H16.053 | Mooren's corneal ulcer, bilateral | ✓ |
| H16.053 | Mooren's corneal ulcer, bilateral | ✓ |
| H16.059 | Mooren's corneal ulcer, unspecified eye | ✓ |
| H16.059 | Mooren's corneal ulcer, unspecified eye | ✓ |
| H16.061 | Mycotic corneal ulcer, right eye | ✓ |
| H16.061 | Mycotic corneal ulcer, right eye | ✓ |
| H16.062 | Mycotic corneal ulcer, left eye | ✓ |
| H16.062 | Mycotic corneal ulcer, left eye | ✓ |
| H16.063 | Mycotic corneal ulcer, bilateral | ✓ |
| H16.063 | Mycotic corneal ulcer, bilateral | ✓ |
| H16.069 | Mycotic corneal ulcer, unspecified eye | ✓ |
| H16.069 | Mycotic corneal ulcer, unspecified eye | ✓ |
| H16.071 | Perforated corneal ulcer, right eye | ✓ |
| H16.071 | Perforated corneal ulcer, right eye | ✓ |
| H16.072 | Perforated corneal ulcer, left eye | ✓ |
| H16.072 | Perforated corneal ulcer, left eye | ✓ |
| H16.073 | Perforated corneal ulcer, bilateral | ✓ |
| H16.073 | Perforated corneal ulcer, bilateral | ✓ |
| H16.079 | Perforated corneal ulcer, unspecified eye | ✓ |
| H16.079 | Perforated corneal ulcer, unspecified eye | ✓ |
| H16.101 | Unspecified superficial keratitis, right eye | ✓ |
| H16.101 | Unspecified superficial keratitis, right eye | ✓ |
| H16.102 | Unspecified superficial keratitis, left eye | ✓ |
| H16.102 | Unspecified superficial keratitis, left eye | ✓ |
| H16.103 | Unspecified superficial keratitis, bilateral | ✓ |
| H16.103 | Unspecified superficial keratitis, bilateral | ✓ |
| H16.109 | Unspecified superficial keratitis, unspecified eye | ✓ |
| H16.109 | Unspecified superficial keratitis, unspecified eye | ✓ |
| H16.111 | Macular keratitis, right eye | ✓ |
| H16.111 | Macular keratitis, right eye | ✓ |
| H16.112 | Macular keratitis, left eye | ✓ |
| H16.112 | Macular keratitis, left eye | ✓ |
| H16.113 | Macular keratitis, bilateral | ✓ |
| H16.113 | Macular keratitis, bilateral | ✓ |
| H16.119 | Macular keratitis, unspecified eye | ✓ |
| H16.119 | Macular keratitis, unspecified eye | ✓ |
| H16.121 | Filamentary keratitis, right eye | ✓ |
| H16.121 | Filamentary keratitis, right eye | ✓ |
| H16.122 | Filamentary keratitis, left eye | ✓ |
| H16.122 | Filamentary keratitis, left eye | ✓ |
| H16.123 | Filamentary keratitis, bilateral | ✓ |
| H16.123 | Filamentary keratitis, bilateral | ✓ |
| H16.129 | Filamentary keratitis, unspecified eye | ✓ |
| H16.129 | Filamentary keratitis, unspecified eye | ✓ |
| H16.131 | Photokeratitis, right eye | ✓ |
| H16.131 | Photokeratitis, right eye | ✓ |
| H16.132 | Photokeratitis, left eye | ✓ |
| H16.132 | Photokeratitis, left eye | ✓ |
| H16.133 | Photokeratitis, bilateral | ✓ |
| H16.133 | Photokeratitis, bilateral | ✓ |
| H16.139 | Photokeratitis, unspecified eye | ✓ |
| H16.139 | Photokeratitis, unspecified eye | ✓ |
| H16.141 | Punctate keratitis, right eye | ✓ |
| H16.141 | Punctate keratitis, right eye | ✓ |
| H16.142 | Punctate keratitis, left eye | ✓ |
| H16.142 | Punctate keratitis, left eye | ✓ |
| H16.143 | Punctate keratitis, bilateral | ✓ |
| H16.143 | Punctate keratitis, bilateral | ✓ |
| H16.149 | Punctate keratitis, unspecified eye | ✓ |
| H16.149 | Punctate keratitis, unspecified eye | ✓ |
| H16.201 | Unspecified keratoconjunctivitis, right eye | ✓ |
| H16.201 | Unspecified keratoconjunctivitis, right eye | ✓ |
| H16.202 | Unspecified keratoconjunctivitis, left eye | ✓ |
| H16.202 | Unspecified keratoconjunctivitis, left eye | ✓ |
| H16.203 | Unspecified keratoconjunctivitis, bilateral | ✓ |
| H16.203 | Unspecified keratoconjunctivitis, bilateral | ✓ |
| H16.209 | Unspecified keratoconjunctivitis, unspecified eye | ✓ |
| H16.209 | Unspecified keratoconjunctivitis, unspecified eye | ✓ |
| H16.211 | Exposure keratoconjunctivitis, right eye | ✓ |
| H16.211 | Exposure keratoconjunctivitis, right eye | ✓ |
| H16.212 | Exposure keratoconjunctivitis, left eye | ✓ |
| H16.212 | Exposure keratoconjunctivitis, left eye | ✓ |
| H16.213 | Exposure keratoconjunctivitis, bilateral | ✓ |
| H16.213 | Exposure keratoconjunctivitis, bilateral | ✓ |
| H16.219 | Exposure keratoconjunctivitis, unspecified eye | ✓ |
| H16.219 | Exposure keratoconjunctivitis, unspecified eye | ✓ |
| H16.221 | Keratoconjunctivitis sicca, not specified as Sjogren's, right eye | ✓ |
| H16.221 | Keratoconjunctivitis sicca, not specified as Sjogren's, right eye | ✓ |
| H16.222 | Keratoconjunctivitis sicca, not specified as Sjogren's, left eye | ✓ |
| H16.222 | Keratoconjunctivitis sicca, not specified as Sjogren's, left eye | ✓ |
| H16.223 | Keratoconjunctivitis sicca, not specified as Sjogren's, bilateral | ✓ |
| H16.223 | Keratoconjunctivitis sicca, not specified as Sjogren's, bilateral | ✓ |
| H16.229 | Keratoconjunctivitis sicca, not specified as Sjogren's, unspecified eye | ✓ |
| H16.229 | Keratoconjunctivitis sicca, not specified as Sjogren's, unspecified eye | ✓ |
| H16.231 | Neurotrophic keratoconjunctivitis, right eye | ✓ |
| H16.231 | Neurotrophic keratoconjunctivitis, right eye | ✓ |
| H16.232 | Neurotrophic keratoconjunctivitis, left eye | ✓ |
| H16.232 | Neurotrophic keratoconjunctivitis, left eye | ✓ |
| H16.233 | Neurotrophic keratoconjunctivitis, bilateral | ✓ |
| H16.233 | Neurotrophic keratoconjunctivitis, bilateral | ✓ |
| H16.239 | Neurotrophic keratoconjunctivitis, unspecified eye | ✓ |
| H16.239 | Neurotrophic keratoconjunctivitis, unspecified eye | ✓ |
| H16.241 | Ophthalmia nodosa, right eye | ✓ |
| H16.241 | Ophthalmia nodosa, right eye | ✓ |
| H16.242 | Ophthalmia nodosa, left eye | ✓ |
| H16.242 | Ophthalmia nodosa, left eye | ✓ |
| H16.243 | Ophthalmia nodosa, bilateral | ✓ |
| H16.243 | Ophthalmia nodosa, bilateral | ✓ |
| H16.249 | Ophthalmia nodosa, unspecified eye | ✓ |
| H16.249 | Ophthalmia nodosa, unspecified eye | ✓ |
| H16.251 | Phlyctenular keratoconjunctivitis, right eye | ✓ |
| H16.251 | Phlyctenular keratoconjunctivitis, right eye | ✓ |
| H16.252 | Phlyctenular keratoconjunctivitis, left eye | ✓ |
| H16.252 | Phlyctenular keratoconjunctivitis, left eye | ✓ |
| H16.253 | Phlyctenular keratoconjunctivitis, bilateral | ✓ |
| H16.253 | Phlyctenular keratoconjunctivitis, bilateral | ✓ |
| H16.259 | Phlyctenular keratoconjunctivitis, unspecified eye | ✓ |
| H16.259 | Phlyctenular keratoconjunctivitis, unspecified eye | ✓ |
| H16.261 | Vernal keratoconjunctivitis, with limbar and corneal involvement, right eye | ✓ |
| H16.261 | Vernal keratoconjunctivitis, with limbar and corneal involvement, right eye | ✓ |
| H16.262 | Vernal keratoconjunctivitis, with limbar and corneal involvement, left eye | ✓ |
| H16.262 | Vernal keratoconjunctivitis, with limbar and corneal involvement, left eye | ✓ |
| H16.263 | Vernal keratoconjunctivitis, with limbar and corneal involvement, bilateral | ✓ |
| H16.263 | Vernal keratoconjunctivitis, with limbar and corneal involvement, bilateral | ✓ |
| H16.269 | Vernal keratoconjunctivitis, with limbar and corneal involvement, unspecified eye | ✓ |
| H16.269 | Vernal keratoconjunctivitis, with limbar and corneal involvement, unspecified eye | ✓ |
| H16.291 | Other keratoconjunctivitis, right eye | ✓ |
| H16.291 | Other keratoconjunctivitis, right eye | ✓ |
| H16.292 | Other keratoconjunctivitis, left eye | ✓ |
| H16.292 | Other keratoconjunctivitis, left eye | ✓ |
| H16.293 | Other keratoconjunctivitis, bilateral | ✓ |
| H16.293 | Other keratoconjunctivitis, bilateral | ✓ |
| H16.299 | Other keratoconjunctivitis, unspecified eye | ✓ |
| H16.299 | Other keratoconjunctivitis, unspecified eye | ✓ |
| H16.301 | Unspecified interstitial keratitis, right eye | ✓ |
| H16.301 | Unspecified interstitial keratitis, right eye | ✓ |
| H16.302 | Unspecified interstitial keratitis, left eye | ✓ |
| H16.302 | Unspecified interstitial keratitis, left eye | ✓ |
| H16.303 | Unspecified interstitial keratitis, bilateral | ✓ |
| H16.303 | Unspecified interstitial keratitis, bilateral | ✓ |
| H16.309 | Unspecified interstitial keratitis, unspecified eye | ✓ |
| H16.309 | Unspecified interstitial keratitis, unspecified eye | ✓ |
| H16.311 | Corneal abscess, right eye | ✓ |
| H16.311 | Corneal abscess, right eye | ✓ |
| H16.312 | Corneal abscess, left eye | ✓ |
| H16.312 | Corneal abscess, left eye | ✓ |
| H16.313 | Corneal abscess, bilateral | ✓ |
| H16.313 | Corneal abscess, bilateral | ✓ |
| H16.319 | Corneal abscess, unspecified eye | ✓ |
| H16.319 | Corneal abscess, unspecified eye | ✓ |
| H16.321 | Diffuse interstitial keratitis, right eye | ✓ |
| H16.321 | Diffuse interstitial keratitis, right eye | ✓ |
| H16.322 | Diffuse interstitial keratitis, left eye | ✓ |
| H16.322 | Diffuse interstitial keratitis, left eye | ✓ |
| H16.323 | Diffuse interstitial keratitis, bilateral | ✓ |
| H16.323 | Diffuse interstitial keratitis, bilateral | ✓ |
| H16.329 | Diffuse interstitial keratitis, unspecified eye | ✓ |
| H16.329 | Diffuse interstitial keratitis, unspecified eye | ✓ |
| H16.331 | Sclerosing keratitis, right eye | ✓ |
| H16.331 | Sclerosing keratitis, right eye | ✓ |
| H16.332 | Sclerosing keratitis, left eye | ✓ |
| H16.332 | Sclerosing keratitis, left eye | ✓ |
| H16.333 | Sclerosing keratitis, bilateral | ✓ |
| H16.333 | Sclerosing keratitis, bilateral | ✓ |
| H16.339 | Sclerosing keratitis, unspecified eye | ✓ |
| H16.339 | Sclerosing keratitis, unspecified eye | ✓ |
| H16.391 | Other interstitial and deep keratitis, right eye | ✓ |
| H16.391 | Other interstitial and deep keratitis, right eye | ✓ |
| H16.392 | Other interstitial and deep keratitis, left eye | ✓ |
| H16.392 | Other interstitial and deep keratitis, left eye | ✓ |
| H16.393 | Other interstitial and deep keratitis, bilateral | ✓ |
| H16.393 | Other interstitial and deep keratitis, bilateral | ✓ |
| H16.399 | Other interstitial and deep keratitis, unspecified eye | ✓ |
| H16.399 | Other interstitial and deep keratitis, unspecified eye | ✓ |
| H16.401 | Unspecified corneal neovascularization, right eye | ✓ |
| H16.401 | Unspecified corneal neovascularization, right eye | ✓ |
| H16.402 | Unspecified corneal neovascularization, left eye | ✓ |
| H16.402 | Unspecified corneal neovascularization, left eye | ✓ |
| H16.403 | Unspecified corneal neovascularization, bilateral | ✓ |
| H16.403 | Unspecified corneal neovascularization, bilateral | ✓ |
| H16.409 | Unspecified corneal neovascularization, unspecified eye | ✓ |
| H16.409 | Unspecified corneal neovascularization, unspecified eye | ✓ |
| H16.411 | Ghost vessels (corneal), right eye | ✓ |
| H16.411 | Ghost vessels (corneal), right eye | ✓ |
| H16.412 | Ghost vessels (corneal), left eye | ✓ |
| H16.412 | Ghost vessels (corneal), left eye | ✓ |
| H16.413 | Ghost vessels (corneal), bilateral | ✓ |
| H16.413 | Ghost vessels (corneal), bilateral | ✓ |
| H16.419 | Ghost vessels (corneal), unspecified eye | ✓ |
| H16.419 | Ghost vessels (corneal), unspecified eye | ✓ |
| H16.421 | Pannus (corneal), right eye | ✓ |
| H16.421 | Pannus (corneal), right eye | ✓ |
| H16.422 | Pannus (corneal), left eye | ✓ |
| H16.422 | Pannus (corneal), left eye | ✓ |
| H16.423 | Pannus (corneal), bilateral | ✓ |
| H16.423 | Pannus (corneal), bilateral | ✓ |
| H16.429 | Pannus (corneal), unspecified eye | ✓ |
| H16.429 | Pannus (corneal), unspecified eye | ✓ |
| H16.431 | Localized vascularization of cornea, right eye | ✓ |
| H16.431 | Localized vascularization of cornea, right eye | ✓ |
| H16.432 | Localized vascularization of cornea, left eye | ✓ |
| H16.432 | Localized vascularization of cornea, left eye | ✓ |
| H16.433 | Localized vascularization of cornea, bilateral | ✓ |
| H16.433 | Localized vascularization of cornea, bilateral | ✓ |
| H16.439 | Localized vascularization of cornea, unspecified eye | ✓ |
| H16.439 | Localized vascularization of cornea, unspecified eye | ✓ |
| H16.441 | Deep vascularization of cornea, right eye | ✓ |
| H16.441 | Deep vascularization of cornea, right eye | ✓ |
| H16.442 | Deep vascularization of cornea, left eye | ✓ |
| H16.442 | Deep vascularization of cornea, left eye | ✓ |
| H16.443 | Deep vascularization of cornea, bilateral | ✓ |
| H16.443 | Deep vascularization of cornea, bilateral | ✓ |
| H16.449 | Deep vascularization of cornea, unspecified eye | ✓ |
| H16.449 | Deep vascularization of cornea, unspecified eye | ✓ |
Frequently asked questions
What is ICD-10-CM code H16?
H16 is an ICD-10-CM category covering Keratitis. It contains 324 more specific diagnosis codes, 252 of which are billable.
Is H16 a billable code?
No — H16 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example H16.0 — Corneal ulcer). 252 of the 324 codes under H16 are billable.
What codes fall under H16?
H16 includes H16.0, H16.0, H16.00, H16.00, H16.001, plus 319 more. See the full list with descriptions and billable status above.
More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees
Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
Code the diagnosis right
Join providers across the country delivering modern virtual care with CareNiva. Free to start, ready in minutes.
100% Satisfaction Guaranteed — try it risk-free