2022 ICD-10-CM Code H16.3

Interstitial and deep keratitis

Version 2021

Not Valid for Submission

ICD-10:H16.3
Short Description:Interstitial and deep keratitis
Long Description:Interstitial and deep keratitis

Code Classification

  • Diseases of the eye and adnexa (H00–H59)
    • Disorders of sclera, cornea, iris and ciliary body (H15-H22)
      • Keratitis (H16)

H16.3 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of interstitial and deep keratitis. The code is not specific and is NOT valid for the year 2022 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding for Interstitial and deep keratitis

Non-specific codes like H16.3 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for interstitial and deep keratitis:

  • NON-BILLABLE CODE - H16.30 for Unspecified interstitial keratitis
  • BILLABLE CODE - Use H16.301 for Unspecified interstitial keratitis, right eye
  • BILLABLE CODE - Use H16.302 for Unspecified interstitial keratitis, left eye
  • BILLABLE CODE - Use H16.303 for Unspecified interstitial keratitis, bilateral
  • BILLABLE CODE - Use H16.309 for Unspecified interstitial keratitis, unspecified eye
  • NON-BILLABLE CODE - H16.31 for Corneal abscess
  • BILLABLE CODE - Use H16.311 for Corneal abscess, right eye
  • BILLABLE CODE - Use H16.312 for Corneal abscess, left eye
  • BILLABLE CODE - Use H16.313 for Corneal abscess, bilateral
  • BILLABLE CODE - Use H16.319 for Corneal abscess, unspecified eye
  • NON-BILLABLE CODE - H16.32 for Diffuse interstitial keratitis
  • BILLABLE CODE - Use H16.321 for Diffuse interstitial keratitis, right eye
  • BILLABLE CODE - Use H16.322 for Diffuse interstitial keratitis, left eye
  • BILLABLE CODE - Use H16.323 for Diffuse interstitial keratitis, bilateral
  • BILLABLE CODE - Use H16.329 for Diffuse interstitial keratitis, unspecified eye
  • NON-BILLABLE CODE - H16.33 for Sclerosing keratitis
  • BILLABLE CODE - Use H16.331 for Sclerosing keratitis, right eye
  • BILLABLE CODE - Use H16.332 for Sclerosing keratitis, left eye
  • BILLABLE CODE - Use H16.333 for Sclerosing keratitis, bilateral
  • BILLABLE CODE - Use H16.339 for Sclerosing keratitis, unspecified eye
  • NON-BILLABLE CODE - H16.39 for Other interstitial and deep keratitis
  • BILLABLE CODE - Use H16.391 for Other interstitial and deep keratitis, right eye
  • BILLABLE CODE - Use H16.392 for Other interstitial and deep keratitis, left eye
  • BILLABLE CODE - Use H16.393 for Other interstitial and deep keratitis, bilateral
  • BILLABLE CODE - Use H16.399 for Other interstitial and deep keratitis, unspecified eye

Information for Patients


Corneal Disorders

Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas.

Problems with the cornea include

Treatments of corneal disorders include medicines, corneal transplantation, and corneal laser surgery.

NIH: National Eye Institute


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)