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  3. H00–H59
  4. H10-H11
  5. Conjunctivitis (H10)

Conjunctivitis (H10)

ICD-10 codes in the H10 section cover various types of conjunctivitis, an inflammation or infection of the eye's conjunctiva. These codes specify different forms such as acute, chronic, allergic, toxic, and other specialized conjunctivitis types, allowing precise diagnosis by eye and condition.

This section includes codes like H10.011 for acute follicular conjunctivitis of the right eye, also known simply as acute follicular conjunctivitis, and H10.021 for mucopurulent conjunctivitis (or purulent conjunctivitis) which can affect one or both eyes. Allergy-related codes such as H10.10 identify acute atopic conjunctivitis, commonly called seasonal allergic conjunctivitis or papillary conjunctivitis. Toxic conjunctivitis caused by chemicals or drugs is coded under H10.211 and related subcodes. Chronic conditions such as giant papillary conjunctivitis appear at H10.41. Other unique forms like ligneous conjunctivitis (H10.51) and rosacea conjunctivitis (H10.82) are also included. For unspecified or less common cases, H10.9 covers unspecified conjunctivitis conditions often described as bacterial, protozoal, or parasitic conjunctivitis. Understanding these distinctions aids medical coders and healthcare professionals in selecting the accurate ICD-10 code for specific conjunctival disorders.

  • Diseases of the eye and adnexa (H00–H59)

    • Disorders of conjunctiva (H10-H11)

        • Conjunctivitis (H10)

        • H10 Conjunctivitis
        • H10.0 Mucopurulent conjunctivitis
        • H10.01 Acute follicular conjunctivitis
        • H10.011 Acute follicular conjunctivitis, right eye
        • H10.012 Acute follicular conjunctivitis, left eye
        • H10.013 Acute follicular conjunctivitis, bilateral
        • H10.019 Acute follicular conjunctivitis, unspecified eye
        • H10.02 Other mucopurulent conjunctivitis
        • H10.021 Other mucopurulent conjunctivitis, right eye
        • H10.022 Other mucopurulent conjunctivitis, left eye
        • H10.023 Other mucopurulent conjunctivitis, bilateral
        • H10.029 Other mucopurulent conjunctivitis, unspecified eye
        • H10.1 Acute atopic conjunctivitis
        • H10.10 Acute atopic conjunctivitis, unspecified eye
        • H10.11 Acute atopic conjunctivitis, right eye
        • H10.12 Acute atopic conjunctivitis, left eye
        • H10.13 Acute atopic conjunctivitis, bilateral
        • H10.2 Other acute conjunctivitis
        • H10.21 Acute toxic conjunctivitis
        • H10.211 Acute toxic conjunctivitis, right eye
        • H10.212 Acute toxic conjunctivitis, left eye
        • H10.213 Acute toxic conjunctivitis, bilateral
        • H10.219 Acute toxic conjunctivitis, unspecified eye
        • H10.22 Pseudomembranous conjunctivitis
        • H10.221 Pseudomembranous conjunctivitis, right eye
        • H10.222 Pseudomembranous conjunctivitis, left eye
        • H10.223 Pseudomembranous conjunctivitis, bilateral
        • H10.229 Pseudomembranous conjunctivitis, unspecified eye
        • H10.23 Serous conjunctivitis, except viral
        • H10.231 Serous conjunctivitis, except viral, right eye
        • H10.232 Serous conjunctivitis, except viral, left eye
        • H10.233 Serous conjunctivitis, except viral, bilateral
        • H10.239 Serous conjunctivitis, except viral, unspecified eye
        • H10.3 Unspecified acute conjunctivitis
        • H10.30 Unspecified acute conjunctivitis, unspecified eye
        • H10.31 Unspecified acute conjunctivitis, right eye
        • H10.32 Unspecified acute conjunctivitis, left eye
        • H10.33 Unspecified acute conjunctivitis, bilateral
        • H10.4 Chronic conjunctivitis
        • H10.40 Unspecified chronic conjunctivitis
        • H10.401 Unspecified chronic conjunctivitis, right eye
        • H10.402 Unspecified chronic conjunctivitis, left eye
        • H10.403 Unspecified chronic conjunctivitis, bilateral
        • H10.409 Unspecified chronic conjunctivitis, unspecified eye
        • H10.41 Chronic giant papillary conjunctivitis
        • H10.411 Chronic giant papillary conjunctivitis, right eye
        • H10.412 Chronic giant papillary conjunctivitis, left eye
        • H10.413 Chronic giant papillary conjunctivitis, bilateral
        • H10.419 Chronic giant papillary conjunctivitis, unspecified eye
        • H10.42 Simple chronic conjunctivitis
        • H10.421 Simple chronic conjunctivitis, right eye
        • H10.422 Simple chronic conjunctivitis, left eye
        • H10.423 Simple chronic conjunctivitis, bilateral
        • H10.429 Simple chronic conjunctivitis, unspecified eye
        • H10.43 Chronic follicular conjunctivitis
        • H10.431 Chronic follicular conjunctivitis, right eye
        • H10.432 Chronic follicular conjunctivitis, left eye
        • H10.433 Chronic follicular conjunctivitis, bilateral
        • H10.439 Chronic follicular conjunctivitis, unspecified eye
        • H10.44 Vernal conjunctivitis
        • H10.45 Other chronic allergic conjunctivitis
        • H10.5 Blepharoconjunctivitis
        • H10.50 Unspecified blepharoconjunctivitis
        • H10.501 Unspecified blepharoconjunctivitis, right eye
        • H10.502 Unspecified blepharoconjunctivitis, left eye
        • H10.503 Unspecified blepharoconjunctivitis, bilateral
        • H10.509 Unspecified blepharoconjunctivitis, unspecified eye
        • H10.51 Ligneous conjunctivitis
        • H10.511 Ligneous conjunctivitis, right eye
        • H10.512 Ligneous conjunctivitis, left eye
        • H10.513 Ligneous conjunctivitis, bilateral
        • H10.519 Ligneous conjunctivitis, unspecified eye
        • H10.52 Angular blepharoconjunctivitis
        • H10.521 Angular blepharoconjunctivitis, right eye
        • H10.522 Angular blepharoconjunctivitis, left eye
        • H10.523 Angular blepharoconjunctivitis, bilateral
        • H10.529 Angular blepharoconjunctivitis, unspecified eye
        • H10.53 Contact blepharoconjunctivitis
        • H10.531 Contact blepharoconjunctivitis, right eye
        • H10.532 Contact blepharoconjunctivitis, left eye
        • H10.533 Contact blepharoconjunctivitis, bilateral
        • H10.539 Contact blepharoconjunctivitis, unspecified eye
        • H10.8 Other conjunctivitis
        • H10.81 Pingueculitis
        • H10.811 Pingueculitis, right eye
        • H10.812 Pingueculitis, left eye
        • H10.813 Pingueculitis, bilateral
        • H10.819 Pingueculitis, unspecified eye
        • H10.82 Rosacea conjunctivitis
        • H10.821 Rosacea conjunctivitis, right eye
        • H10.822 Rosacea conjunctivitis, left eye
        • H10.823 Rosacea conjunctivitis, bilateral
        • H10.829 Rosacea conjunctivitis, unspecified eye
        • H10.89 Other conjunctivitis
        • H10.9 Unspecified conjunctivitis

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • keratoconjunctivitis H16.2

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Chlamydia trachomatis

Type species of CHLAMYDIA causing a variety of ocular and urogenital diseases.

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.

Pinguecula

A yellowish thickened lesion on the conjunctiva near the CORNEA representing a benign degenerative change in the CONJUNCTIVA caused by the leakage and deposition of certain blood proteins through the permeable capillaries near the LIMBUS.