2024 ICD-10-CM Diagnosis Code H16.8

Other keratitis

ICD-10-CM Code:
H16.8
ICD-10 Code for:
Other keratitis
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

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

H16.8 is a billable diagnosis code used to specify a medical diagnosis of other keratitis. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Autoimmune keratitis
  • Autosomal dominant keratitis
  • Bacterial keratitis
  • Bilateral diffuse lamellar keratitis of eyes
  • Bilateral marginal keratitis of eyes caused by staphylococcus toxin
  • Bilateral scleritis of eyes
  • Bilateral sclerokeratitis
  • Bullous keratopathy
  • Chemical injury to cornea
  • Chemical keratitis
  • Contact lens related sterile keratitis
  • Corneal inflammatory stromal infiltration
  • Diffuse lamellar keratitis
  • Diffuse lamellar keratitis of left eye
  • Diffuse lamellar keratitis of right eye
  • Disorder of eosinophil
  • Enlargement of corneal endothelial cells
  • Eosinophilic keratitis
  • Focal stromal keratitis
  • Fungal keratitis
  • Fungal keratitis
  • Fungal keratitis
  • Fungal keratitis
  • Fusarium infection
  • Fusarium infection
  • Fusarium infection
  • Granulomatous keratitis
  • Inflammatory pseudoguttae
  • Keratitis bullosa
  • Keratitis due to trauma
  • Keratitis due to trauma
  • Lyme keratitis
  • Marginal keratitis
  • Marginal keratitis
  • Marginal keratitis
  • Marginal keratitis
  • Marginal keratitis of left eye caused by staphylococcus toxin
  • Marginal keratitis of right eye caused by staphylococcus toxin
  • Microsporidia keratitis
  • Mycobacterial keratitis
  • Mycotic keratitis due to Fusarium
  • Mycotic keratitis due to Fusarium oxysporum
  • Mycotic keratitis due to Fusarium solani
  • Necrotizing keratitis
  • Ophthalmic Lyme borreliosis
  • Parasitic keratitis
  • Sclerokeratitis
  • Sclerokeratitis of left eye
  • Sclerokeratitis of right eye
  • Sterile keratitis
  • Sterile keratitis
  • Vaccinia keratitis
  • Viral keratitis
  • Xerotic keratitis

Clinical Classification

Clinical Information

  • Acanthamoeba Keratitis

    infection of the cornea by an ameboid protozoan which may cause corneal ulceration leading to blindness.
  • Corneal Ulcer

    loss of epithelial tissue from the surface of the cornea due to progressive erosion and necrosis of the tissue; usually caused by bacterial, fungal, or viral infection.
  • Keratitis

    inflammation of the cornea.
  • Keratitis, Dendritic

    a form of herpetic keratitis characterized by the formation of small vesicles which break down and coalesce to form recurring dendritic ulcers, characteristically irregular, linear, branching, and ending in knoblike extremities. (dictionary of visual science, 3d ed)
  • Keratitis, Herpetic

    a superficial, epithelial herpesvirus hominis infection of the cornea, characterized by the presence of small vesicles which may break down and coalesce to form dendritic ulcers (keratitis, dendritic). (dictionary of visual science, 3d ed)
  • Acanthamoeba Keratitis

    keratitis due to infection by acanthamoeba; it is usually associated with soft contact lens wear, particularly overnight wear.
  • Dendritic Keratitis

    infection of the cornea with herpes simplex virus, resulting in branching ulcers of the corneal tissue.
  • Fungal Keratitis

    keratitis caused by fungi.
  • Grade 1 Keratitis, CTCAE|CTCAE Grade 1 Keratitis (corneal inflammation/corneal ulceration)|Grade 1 Keratitis|Grade 1 Keratitis (corneal inflammation/corneal ulceration)

    asymptomatic; clinical or diagnostic observations only; intervention not indicated
  • Grade 2 Keratitis, CTCAE|CTCAE Grade 2 Keratitis (corneal inflammation/corneal ulceration)|Grade 2 Keratitis|Grade 2 Keratitis (corneal inflammation/corneal ulceration)

    symptomatic; moderate decrease in visual acuity (best corrected visual acuity 20/40 and better or 3 lines or less decreased vision from known baseline)
  • Grade 3 Keratitis, CTCAE|CTCAE Grade 3 Keratitis (corneal inflammation/corneal ulceration)|Grade 3 Keratitis|Grade 3 Keratitis (corneal inflammation/corneal ulceration)

    symptomatic with marked decrease in visual acuity (best corrected visual acuity worse than 20/40 or more than 3 lines of decreased vision from known baseline, up to 20/200); corneal ulcer; limiting self care adl
  • Grade 4 Keratitis, CTCAE|CTCAE Grade 4 Keratitis (corneal inflammation/corneal ulceration)|Grade 4 Keratitis|Grade 4 Keratitis (corneal inflammation/corneal ulceration)

    perforation; best corrected visual acuity of 20/200 or worse in the affected eye
  • Infectious Keratitis|Infective Keratitis

    inflammation of the cornea secondary to an infectious process.
  • Keratitis, CTCAE|Keratitis|Keratitis|Keratitis (corneal inflammation/corneal ulceration)

    a disorder characterized by inflammation to the cornea of the eye.
  • PAX6 wt Allele|AN|AN2|Aniridia, Keratitis Gene|D11S812E|MGC17209|MGDA|Paired Box 6 wt Allele|Paired Box Gene 6 (Aniridia, Keratitis) Gene|WAGR

    human pax6 wild-type allele is located in the vicinity of 11p13 and is approximately 29 kb in length. this allele, which encodes paired box protein pax-6, plays a role in the mediation of transcription. mutations in the gene are associated with a number of congenital disorders of the eye.
  • Photokeratitis|Ultraviolet Keratitis|Ultraviolet Keratitis

    injury to the cornea secondary to ultraviolet light.
  • Bullous Keratopathy

    keratopathy that is characterized by the presence of epithelial bullae.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10-CM Code Edits are applicable to this code:

  • Unacceptable principal diagnosis - There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Convert H16.8 to ICD-9-CM

  • ICD-9-CM Code: 370.8 - Keratitis NEC
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


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:

  • Refractive errors
  • Allergies
  • Infections
  • Injuries
  • Dystrophies - conditions in which parts of the cornea lose clarity due to a buildup of cloudy material

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

NIH: National Eye Institute


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.