Is H16.21 a billable code?
No. H16.21 is a header code that groups 4 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
H16.21: Exposure keratoconjunctivitis
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
H16.21 groups related diagnoses under exposure keratoconjunctivitis. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under H16.21
- H16.211Exposure keratoconjunctivitis, right eye
- H16.212Exposure keratoconjunctivitis, left eye
- H16.213Exposure keratoconjunctivitis, bilateral
- H16.219Exposure keratoconjunctivitis, unspecified eye
Other codes in H16.2 Keratoconjunctivitis
- H16.20Unspecified keratoconjunctivitisheader
- H16.22Keratoconjunctivitis sicca, not specified as Sjogren'sheader
- H16.23Neurotrophic keratoconjunctivitisheader
- H16.24Ophthalmia nodosaheader
- H16.25Phlyctenular keratoconjunctivitisheader
- H16.26Vernal keratoconjunctivitis, with limbar and corneal involvementheader
- H16.29Other keratoconjunctivitisheader
H16.21 questions
What does H16.21 mean?
H16.21 is the ICD-10-CM code for Exposure keratoconjunctivitis. It is in chapter 7, Diseases of the eye and adnexa (H00-H59).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.