2024 ICD-10-CM Diagnosis Code H10.9

Unspecified conjunctivitis

ICD-10-CM Code:
H10.9
ICD-10 Code for:
Unspecified conjunctivitis
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 conjunctiva
      (H10-H11)
      • Conjunctivitis
        (H10)

H10.9 is a billable diagnosis code used to specify a medical diagnosis of unspecified conjunctivitis. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like H10.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Bacterial conjunctivitis
  • Bilateral conjunctivitis
  • Bilateral infectious conjunctivitis
  • Conjunctivitis
  • Conjunctivitis associated with autoimmune skin disorder
  • Conjunctivitis associated with autoimmune skin disorder
  • Conjunctivitis associated with autoimmune skin disorder
  • Conjunctivitis associated with epidermolysis bullosa
  • Conjunctivitis due to Bordetella pertussis
  • Conjunctivitis due to lichen planus
  • Conjunctivitis due to reactive arthritis triad
  • Conjunctivitis of bilateral eyes caused by bacteria
  • Conjunctivitis of left eye
  • Conjunctivitis of left eye caused by bacteria
  • Conjunctivitis of left eye caused by bacteria
  • Conjunctivitis of right eye
  • Conjunctivitis of right eye caused by bacteria
  • Conjunctivitis of right eye caused by bacteria
  • Follicular conjunctivitis
  • Infection due to Bordetella
  • Infection of conjunctiva of left eye
  • Infection of conjunctiva of right eye
  • Parasitic conjunctivitis
  • Protozoal conjunctivitis
  • Rhinoconjunctivitis

Clinical Classification

Clinical Information

  • Conjunctivitis

    inflammation of the conjunctiva.
  • Conjunctivitis, Acute Hemorrhagic

    a highly contagious disease characterized by subconjunctival hemorrhage, sudden swelling of the eyelids and congestion, redness, and pain in the eye. epidemic conjunctivitis caused by enterovirus 70 (ev-70) was first described in africa in 1969. it is caused also by coxsackievirus a24 variant (ca24v). epidemics by this organism have appeared most frequently in asia.
  • Conjunctivitis, Allergic

    conjunctivitis due to hypersensitivity to various allergens.
  • Conjunctivitis, Bacterial

    purulent infections of the conjunctiva by several species of gram-negative, gram-positive, or acid-fast organisms. some of the more commonly found genera causing conjunctival infections are haemophilus, streptococcus, neisseria, and chlamydia.
  • Conjunctivitis, Inclusion

    an infection of the eyes characterized by the presence in conjunctival epithelial cells of inclusion bodies indistinguishable from those of trachoma. it is acquired by infants during birth and by adults from swimming pools. the etiological agent is chlamydia trachomatis whose natural habitat appears to be the genito-urinary tract. inclusion conjunctivitis is a less severe disease than trachoma and usually clears up spontaneously.
  • Conjunctivitis, Viral

    inflammation, often mild, of the conjunctiva caused by a variety of viral agents. conjunctival involvement may be part of a systemic infection.
  • Chlamydia trachomatis

    type species of chlamydia causing a variety of ocular and urogenital diseases.
  • Bacterial Conjunctivitis

    inflammation of the conjunctiva caused by a variety of bacterial agents.

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).

Convert H10.9 to ICD-9-CM

  • ICD-9-CM Code: 372.30 - Conjunctivitis NOS

Patient Education


Pink Eye

Conjunctivitis is the medical name for pink eye. It involves inflammation of the outer layer of the eye and inside of the eyelid. It can cause swelling, itching, burning, discharge, and redness. Causes include:

  • Bacterial or viral infection
  • Allergies
  • Substances that cause irritation
  • Contact lens products, eye drops, or eye ointments

Pink eye usually does not affect vision. Infectious pink eye can easily spread from one person to another. The infection will clear in most cases without medical care, but bacterial pink eye needs treatment with antibiotic eye drops or ointment.

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.