2026 ICD-10-CM Diagnosis Code H16.222Keratoconjunctivitis sicca, not specified as Sjogren's, left eye

ICD-10-CM Codes›H00–H59›H15-H22›H16

ICD-10-CM H16.222
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H16.222 is a billable ICD-10-CM diagnosis code for keratoconjunctivitis sicca, not specified as Sjogren's, left eye. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease.

Code Identity

ICD-10-CM Code
H16.222
Billable Status
Yes — Valid for Submission
Code Describes
Keratoconjunctivitis sicca, not specified as Sjogren's, left eye
Short Description
Keratoconjunct sicca, not specified as Sjogren's, left eye
Parent Code
H16.22
Keratoconjunctivitis sicca, not specified as Sjogren's

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH15-H22Disorders of sclera, cornea, iris and ciliary body
CategoryH16Keratitis
This CodeH16.222Keratoconjunctivitis sicca, not specified as Sjogren's, left eye

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

Corneal Disorders

Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas.

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Convert H16.222 to ICD-9-CMHistory

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

ICD-9-CM
370.33 Keratoconjunctivit sicca
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H16.222Overview

Is H16.222 (Keratoconjunctivitis sicca, not specified as Sjogren's) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report keratoconjunctivitis sicca, not specified as Sjogren's, left eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H16.222 group to?

When keratoconjunctivitis sicca, not specified as Sjogren's, left eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H16.222?

Under the General Equivalence Mappings, keratoconjunctivitis sicca, not specified as Sjogren's, left eye converts to ICD-9-CM 370.33 (keratoconjunctivit sicca). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.