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ICD-10-CM 2027 diagnosis code

H40.1133Primary open-angle glaucoma, bilateral, severe stage

✓ Billable / specificRequires 7th character

H40.1133 is a valid, billable ICD-10-CM code for primary open-angle glaucoma, bilateral, severe stage. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About H40.1133

H40.1133 is the ICD-10-CM diagnosis code for primary open-angle glaucoma, bilateral, severe stage. It belongs to category H40 (glaucoma), block H40-H42 (glaucoma) and chapter 7 (diseases of the eye and adnexa). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

The 7th character "3" means severe stage.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It was added in FY2017, effective October 1, 2016.

Before ICD-10, this condition was coded in ICD-9-CM as 365.11 (primary open angle glaucoma) and 365.73 (severe stage glaucoma).

7th character

3severe stage

Other encounter types for H40.113:

Notes that apply from higher levels

Instructions written at a parent level also apply to H40.1133.

› From H40 Glaucoma
Excludes1
  • absolute glaucoma (H44.51-)
  • congenital glaucoma (Q15.0)
  • traumatic glaucoma due to birth injury (P15.3)

Broader instructions also apply from Chapter 7: Diseases of the eye and adnexa.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 365.11Primary open angle glaucomaapproximate, combination
  • 365.73Severe stage glaucomaapproximate, combination

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about H40.1133

Is H40.1133 billable?

Yes. H40.1133 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "3" at the end of H40.1133 mean?

It is the 7th character for severe stage.

Can H40.1133 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict H40.1133 as a principal diagnosis.

Is H40.1133 a CC or MCC?

No. H40.1133 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does H40.1133 group to?

H40.1133 is used in the MS-DRG v44.0 logic for MS-DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent) and MS-DRG 125 (Other Disorders of the Eye without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for H40.1133?

The CMS General Equivalence Mappings map H40.1133 to ICD-9-CM 365.11 and 365.73.