2027 ICD-10-CM Diagnosis Code H10Conjunctivitis

ICD-10-CM Codes›H00–H59›H10-H11›H10

ICD-10-CM H10
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H10 is a non-billable ICD-10-CM category code for conjunctivitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as H10.011, H10.012, H10.013, and H10.019.

Code Identity

ICD-10-CM Code
H10
Billable Status
No — Non-Billable Category
Code Describes
Conjunctivitis
Short Description
Conjunctivitis
Same as the full description in the CMS dataset.
Chapter
H10-H11
Disorders of conjunctiva

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH10-H11Disorders of conjunctiva
CategoryH10Conjunctivitis
This CodeH10Conjunctivitis

Specific Coding for ConjunctivitisOverview

Non-specific codes like H10 require more characters. Use one of these billable codes instead:

  • H10.0 for Mucopurulent conjunctivitis

  • H10.01 for Acute follicular conjunctivitis

  • H10.02 for Other mucopurulent conjunctivitis

  • H10.1 for Acute atopic conjunctivitis

  • Use H10.10 for Acute atopic conjunctivitis, unspecified eye

  • Use H10.11 for Acute atopic conjunctivitis, right eye

  • Use H10.12 for Acute atopic conjunctivitis, left eye

  • Use H10.13 for Acute atopic conjunctivitis, bilateral

  • H10.2 for Other acute conjunctivitis

  • H10.21 for Acute toxic conjunctivitis

  • H10.22 for Pseudomembranous conjunctivitis

  • H10.23 for Serous conjunctivitis, except viral

  • H10.3 for Unspecified acute conjunctivitis

  • Use H10.30 for Unspecified acute conjunctivitis, unspecified eye

  • Use H10.31 for Unspecified acute conjunctivitis, right eye

  • Use H10.32 for Unspecified acute conjunctivitis, left eye

  • Use H10.33 for Unspecified acute conjunctivitis, bilateral

  • H10.4 for Chronic conjunctivitis

  • H10.40 for Unspecified chronic conjunctivitis

  • H10.41 for Chronic giant papillary conjunctivitis

  • H10.42 for Simple chronic conjunctivitis

  • H10.43 for Chronic follicular conjunctivitis

  • Use H10.44 for Vernal conjunctivitis

  • Use H10.45 for Other chronic allergic conjunctivitis

  • H10.5 for Blepharoconjunctivitis

  • H10.50 for Unspecified blepharoconjunctivitis

  • H10.51 for Ligneous conjunctivitis

  • H10.52 for Angular blepharoconjunctivitis

  • H10.53 for Contact blepharoconjunctivitis

  • H10.8 for Other conjunctivitis

  • H10.81 for Pingueculitis

  • H10.82 for Rosacea conjunctivitis

  • Use H10.89 for Other conjunctivitis

  • Use H10.9 for Unspecified conjunctivitis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H10: its own notes plus those printed at Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical InformationClinical

  • Conjunctivitis

    inflammation of the conjunctiva.

Patient EducationClinical

Pink Eye

Conjunctivitis is the medical name for pink eye. It involves inflammation of the outer layer of the eye and inside of the eyelid. It can cause swelling, itching, burning, discharge, and redness. Causes include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H10Overview

What is the ICD-10 code for conjunctivitis?

H10 is the ICD-10-CM category for conjunctivitis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is H10 (Conjunctivitis) a billable code?

No. This is a category header that groups the codes for conjunctivitis, and headers cannot be submitted on claims. Claims for conjunctivitis need a more specific code from this category, such as H10.011, H10.012, and H10.013.

Can H10 be reported with a code from H16.2?

Not as a rule. The Excludes1 note on H10 lists "keratoconjunctivitis (H16.2-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).