H16.32

Non-Billable
ChapterH00–H59
Ranksubcategory
Official Description

Diffuse interstitial keratitis

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 7: Diseases of the Eye and Adnexa (H00-H59).

Instructional Notes

Includes
  • Cogan's syndrome
General instructions are available for the parent sections:
View CH7 Notes

Clinical Hierarchy

CH7Diseases of the eye and adnexa (H00-H59)
H15-H22Disorders of sclera, cornea, iris and ciliary body (H15-H22)
H16Keratitis
H16.3Interstitial and deep keratitis
H16.32Diffuse interstitial keratitis
H16.321Diffuse interstitial keratitis, right eye
H16.322Diffuse interstitial keratitis, left eye
H16.323Diffuse interstitial keratitis, bilateral
H16.329Diffuse interstitial keratitis, unspecified eye

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to H16.32:

chapterCH7
Diseases of the eye and adnexa (H00-H59)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to H16.32. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths
Cogan's syndrome1 unique routes
Direct index entry→H16.32
Keratitis (nodular) (nonulcerative) (simple) (zonular)1 unique routes
interstitial (nonsyphilitic)
diffuse→H16.32

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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