2027 ICD-10-CM Diagnosis Code H11.9Unspecified disorder of conjunctiva

ICD-10-CM Codes›H00–H59›H10-H11›H11

ICD-10-CM H11.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H11.9 is a billable ICD-10-CM diagnosis code for unspecified disorder of conjunctiva. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. Coders also document this condition as disorder of conjunctiva. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease.

Code Identity

ICD-10-CM Code
H11.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified disorder of conjunctiva
Short Description
Unspecified disorder of conjunctiva
Same as the full description in the CMS dataset.
Parent Code
H11
Other disorders of conjunctiva

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH10-H11Disorders of conjunctiva
CategoryH11Other disorders of conjunctiva
This CodeH11.9Unspecified disorder of conjunctiva

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of conjunctiva
  • Disorder of conjunctiva caused by radiation
  • Lesion of conjunctiva
  • Lesion of plica semilunaris
  • Lesion of plica semilunaris of both eyes
  • Lesion of plica semilunaris of left eye
  • Lesion of plica semilunaris of right eye
  • Pale conjunctiva
  • Plica semilunaris finding

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H11.9: its own notes plus those printed at H11 and 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.

From H11 Other disorders of conjunctiva applies to 95 codes

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.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE001
Cornea and external disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Eye Diseases

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Read the full article at MedlinePlus

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

Convert H11.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
372.9 Conjunctiva disorder NOS
Exact Match The mapping is direct, with no qualifiers.

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 H11.9Overview

What is the ICD-10 code for unspecified disorder of conjunctiva?

The ICD-10-CM code for unspecified disorder of conjunctiva is H11.9 (sometimes written as H119). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is H11.9 (Other disorders of conjunctiva) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified disorder of conjunctiva on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does H11.9 group to?

When unspecified disorder of conjunctiva is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

Can H11.9 be reported with a code from H16.2?

Not as a rule. The Excludes1 note at H11, which applies to H11.9, 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).

What is the ICD-9 equivalent of H11.9?

Under the General Equivalence Mappings, unspecified disorder of conjunctiva converts to ICD-9-CM 372.9 (conjunctiva disorder NOS). The mapping is a direct match.