---
title: "ICD-10-CM H10.221: Pseudomembranous conjunctivitis, right… | BillingBrief"
description: "ICD-10-CM code H10.221: Pseudomembranous conjunctivitis, right eye. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/h10.221/"
language: "en"
---

# H10.221 Pseudomembranous conjunctivitis, right eye

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Pseudomembranous conjunctivitis, right eye

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   keratoconjunctivitis (H16.2-)

## Related codes

-   [`H10.211` Acute toxic conjunctivitis, right eye ICD-10-CM](https://billingbrief.com/icd10/h10.211/)
-   [`H10.212` Acute toxic conjunctivitis, left eye ICD-10-CM](https://billingbrief.com/icd10/h10.212/)
-   [`H10.213` Acute toxic conjunctivitis, bilateral ICD-10-CM](https://billingbrief.com/icd10/h10.213/)
-   [`H10.219` Acute toxic conjunctivitis, unspecified eye ICD-10-CM](https://billingbrief.com/icd10/h10.219/)
-   [`H10.222` Pseudomembranous conjunctivitis, left eye ICD-10-CM](https://billingbrief.com/icd10/h10.222/)
-   [`H10.223` Pseudomembranous conjunctivitis, bilateral ICD-10-CM](https://billingbrief.com/icd10/h10.223/)
-   [`H10.229` Pseudomembranous conjunctivitis, unspecified eye ICD-10-CM](https://billingbrief.com/icd10/h10.229/)
-   [`H10.231` Serous conjunctivitis, except viral, right eye ICD-10-CM](https://billingbrief.com/icd10/h10.231/)

## Common questions

### Is H10.221 a billable code?

Yes. H10.221 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

H10 Conjunctivitis

Chapter

Diseases of the eye and adnexa

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).