H16.309 Unspecified interstitial keratitis, unspecified eye

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 370.50 Interstitial keratitis, unspecified (approximate)

Diagnosis Index entries for H16.309

• Keratitis (nodular) (nonulcerative) (simple) (zonular) › deep

Nearby codes

• H16.3 Interstitial and deep keratitis
• H16.30 Unspecified interstitial keratitis
• H16.301 Unspecified interstitial keratitis, right eye
• H16.302 Unspecified interstitial keratitis, left eye
• H16.303 Unspecified interstitial keratitis, bilateral
• H16.309 Unspecified interstitial keratitis, unspecified eye (this code)
• H16.31 Corneal abscess
• H16.311 Corneal abscess, right eye
• H16.312 Corneal abscess, left eye
• H16.313 Corneal abscess, bilateral
• H16.319 Corneal abscess, unspecified eye