2026 ICD-10-CM Diagnosis Code H10Conjunctivitis

ICD-10-CM Codes›H00–H59›H10-H11›H10

ICD-10-CM H10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H10 is a non-billable ICD-10-CM category code for conjunctivitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as H10.011, H10.012, H10.013, and H10.019.

Code Identity

ICD-10-CM Code
H10
Billable Status
No — Non-Billable Category
Code Describes
Conjunctivitis
Short Description
Conjunctivitis
Same as the full description in the CMS dataset.
Chapter
H10-H11
Disorders of conjunctiva

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH10-H11Disorders of conjunctiva
CategoryH10Conjunctivitis
This CodeH10Conjunctivitis

Specific Coding for ConjunctivitisOverview

Non-specific codes like H10 require more characters. Use one of these billable codes instead:

  • H10.0 for Mucopurulent conjunctivitis

  • H10.01 for Acute follicular conjunctivitis

  • H10.02 for Other mucopurulent conjunctivitis

  • H10.1 for Acute atopic conjunctivitis

  • Use H10.10 for Acute atopic conjunctivitis, unspecified eye

  • Use H10.11 for Acute atopic conjunctivitis, right eye

  • Use H10.12 for Acute atopic conjunctivitis, left eye

  • Use H10.13 for Acute atopic conjunctivitis, bilateral

  • H10.2 for Other acute conjunctivitis

  • H10.21 for Acute toxic conjunctivitis

  • H10.22 for Pseudomembranous conjunctivitis

  • H10.23 for Serous conjunctivitis, except viral

  • H10.3 for Unspecified acute conjunctivitis

  • Use H10.30 for Unspecified acute conjunctivitis, unspecified eye

  • Use H10.31 for Unspecified acute conjunctivitis, right eye

  • Use H10.32 for Unspecified acute conjunctivitis, left eye

  • Use H10.33 for Unspecified acute conjunctivitis, bilateral

  • H10.4 for Chronic conjunctivitis

  • H10.40 for Unspecified chronic conjunctivitis

  • H10.41 for Chronic giant papillary conjunctivitis

  • H10.42 for Simple chronic conjunctivitis

  • H10.43 for Chronic follicular conjunctivitis

  • Use H10.44 for Vernal conjunctivitis

  • Use H10.45 for Other chronic allergic conjunctivitis

  • H10.5 for Blepharoconjunctivitis

  • H10.50 for Unspecified blepharoconjunctivitis

  • H10.51 for Ligneous conjunctivitis

  • H10.52 for Angular blepharoconjunctivitis

  • H10.53 for Contact blepharoconjunctivitis

  • H10.8 for Other conjunctivitis

  • H10.81 for Pingueculitis

  • H10.82 for Rosacea conjunctivitis

  • Use H10.89 for Other conjunctivitis

  • Use H10.9 for Unspecified conjunctivitis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • keratoconjunctivitis H16.2

Clinical InformationClinical

  • 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.

Patient EducationClinical

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:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H10Overview

Is H10 (Conjunctivitis) a billable code?

No. This is a category header that groups the codes for conjunctivitis, and headers cannot be submitted on claims. Claims for conjunctivitis need a more specific code from this category, such as H10.011, H10.012, and H10.013.