Conjunctivitis ICD-10-CM Codes

What ICD-10 Codes are Used for Conjunctivitis 

Conjunctivitis, also called “pink eye,” when the conjunctiva swells or is inflamed, has several types. Listed below are the ICD Codes under Conjunctivitis listed according to type:

H10.0: Mucopurulent conjunctivitis

This type of conjunctivitis differs from the others because of the secretion of mucus and pus from one’s eyes. Under this code are two more specific types of mucopurulent conjunctivitis:

• H10.01: Acute follicular conjunctivitis
• H10.02: Other mucopurulent conjunctivitis

Note that under the codes mentioned above are more specific codes that determine the affected eye. 

H10.1: Acute atopic conjunctivitis

Also known as atopic keratoconjunctivitis or acute allergic conjunctivitis, acute atopic conjunctivitis is a type of conjunctivitis that’s caused by allergies. Under this code are four specific codes: 

• 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

Aside from allergens, as mentioned above, there are other causes for acute conjunctivitis, like irritants, chemicals, and viruses. The following specific codes are used for billing and diagnosing conjunctivitis caused by the ones mentioned above:

• H10.21: Acute toxic conjunctivitis
• H10.22: Pseudomembranous conjunctivitis
• H10.23: Serous conjunctivitis except viral

Note that under the codes mentioned above are more specific codes that determine the affected eye. 

H10.3: Unspecified acute conjunctivitis

The following codes are used if the patient has acute conjunctivitis - the symptoms only last for 3 to 4 weeks - but the source or cause is unspecified. 

• 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

The following codes are used if the patient has chronic conjunctivitis, wherein the symptoms last for more than 4 weeks. Allergies, bacteria, or viruses may cause the conditions being referred to below. 

• H10.40: Unspecified chronic conjunctivitis
• H10.41: Chronic giant papillary conjunctivitis
• H10.42: Simple chronic conjunctivitis
• H10.43: Chronic follicular conjunctivitis
• H10.44: Vernal conjunctivitis
• H10.45: Other chronic allergic conjunctivitis

Note that codes under H10.40 to H10.43 there are more specific codes that determine the affected eye. 

H10.5: Blepharoconjunctivitis

Blepharoconjunctivitis is a type of conjunctivitis that combines blepharitis and conjunctivitis which has symptoms of swollen eyelids and inflammation of the conjunctiva. Below are the different codes for blepharoconjunctivitis according to the cause, which may be bacteria, genes, etc. 

• H10.50: Unspecified blepharoconjunctivitis
• H10.51: Ligneous conjunctivitis
• H10.52: Angular blepharoconjunctivitis
• H10.53: Contact blepharoconjuntivitis

Note that under the codes mentioned above are more specific codes that determine the affected eye. 

H10.8: Other conjunctivitis

• H10.81: Pingueculitis
• H10.82: Rosacea conjunctivitis
• H10.89: Other conjunctivitis

Note that codes under H10.81 to H10.82 there are more specific codes that determine the affected eye. 

H10.9: Unspecified conjunctivitis