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H40.9

H40.9: Unspecified glaucoma

Billable / specific codeICD-10-CM

H40.9 is a billable, specific ICD-10-CM code for unspecified glaucoma. It is valid for submission on a claim.

Check H40.9 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above H40.9

A category’s note binds every code beneath it.

Written on H40: Glaucoma

  • absolute glaucoma (H44.51-)
  • congenital glaucoma (Q15.0)
  • traumatic glaucoma due to birth injury (P15.3)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

H40.9 is named in 11 Medicare coverage policies: 11 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56457Billing and Coding: Corneal Pachymetry
  • A56537Billing and Coding: Scanning Computerized Ophthalmic Diagnostic Imaging (SCODI)
  • A56544Billing and Coding: Cataract Extraction
  • A56548Billing and Coding: Corneal Pachymetry

Alphabetic index entries that lead here

  • Glaucoma

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under H40

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.