ICD-10-CM Tabular Index · Chapter 7 · FY 2027 H10

Conjunctivitis (H10) ICD-10-CM

The H10 code range covers conjunctivitis with 95 ICD-10-CM diagnosis codes. 72 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.

✓ Built from the official CMS FY 2027 datasetEffective Oct 1, 2026 – Sep 30, 2027
95
Diagnosis Codes
72
Billable Codes
H10
Code Range
H10–H11
Parent Section

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.

ICD-10-CM

Codes in the H10 Range 95 codes · 72 billable

95 of 95 shown
  • H10 ConjunctivitisNon-billable
  • H10.0 Mucopurulent conjunctivitisNon-billable
  • H10.01 Acute follicular conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • H10.21 Acute toxic conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • 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 viralNon-billable
  • 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 conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • H10.40 Unspecified chronic conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • 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 BlepharoconjunctivitisNon-billable
  • H10.50 Unspecified blepharoconjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • 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 blepharoconjunctivitisNon-billable
  • 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 blepharoconjunctivitisNon-billable
  • 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 conjunctivitisNon-billable
  • H10.81 PingueculitisNon-billable
  • H10.811 Pingueculitis, right eye
  • H10.812 Pingueculitis, left eye
  • H10.813 Pingueculitis, bilateral
  • H10.819 Pingueculitis, unspecified eye
  • H10.82 Rosacea conjunctivitisNon-billable
  • 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

Clinical Terms in This Code Range

Definitions from the National Library of Medicine for conditions coded in the H10 range.

Acute Atopic Conjunctivitis

Atopic conjunctivitis that is of relatively short duration and that has a rapid onset.

Acute Follicular Conjunctivitis

Follicular conjunctivitis caused by viruses and a few bacteria (e.g., Chlamydia).

Blepharoconjunctivitis

Inflammation of both the eyelids and the conjunctiva.

Chronic Conjunctivitis

Conjunctivitis that is persistent and long-standing.

Chronic Follicular Conjunctivitis

Follicular conjunctivitis caused by Chlamydia trachomatis, Moraxella, Borrelia, Molluscum contagiosum, or toxicity from eye make-up and eye drops.

Conjunctivitis

INFLAMMATION of the CONJUNCTIVA.

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.

Endophthalmitis

Suppurative inflammation of the tissues of the internal structures of the eye frequently associated with an infection.

Pseudomembranous Conjunctivitis

Conjunctivitis that is characterized by formation of a pseudomembrane.

Vernal Conjunctivitis

Inflammation of the cornea that is seasonal in nature.

About the H10 Code Range

Conjunctivitis means inflammation of the conjunctiva of the eye. The codes distinguish acute and chronic forms, along with other named forms and unspecified conjunctivitis.

Acute forms include mucopurulent H10.0, atopic H10.1, and other acute H10.2 conjunctivitis. The atopic and unspecified acute subdivisions distinguish the right eye, left eye, both eyes, or an unspecified eye.

Chronic conjunctivitis H10.4 separates named forms, including follicular and vernal. Other branches identify blepharoconjunctivitis H10.5 and forms such as pingueculitis and rosacea conjunctivitis under H10.8.

Questions About This Page

How many billable codes are in the H10 range?

Of the 95 codes in this range, 72 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.

What does the H10 range classify?

The range classifies conjunctivitis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.

Related References

All ICD-10-CM ChaptersAll of Chapter 7ICD-10-CM Code LookupMS-DRG ReferenceMedicare Code EditsPOA Exempt Codes

Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.