H40.232 ICD-10-CM Code: Intermittent angle-closure glaucoma, left eye
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FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Glaucoma (H40-H42)
H40.232
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceIntermittent angle-closure glaucoma, left eye
A recurring form of glaucoma in the left eye where the drainage angle periodically closes, causing temporary increases in eye pressure.
Buddy Insight
Intermittent angle-closure glaucoma of the left eye represents periodic angle closure in the left eye with episodic intraocular pressure elevation.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
MappedHCC 244
RAF 0.0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for H40.232 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H40.232 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H40.232 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H40.232 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H40.232 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H40.232 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for H40.232 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is H40.232 an HCC code?
No. H40.232 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
Work H40.232 in the Code Book — tabular path, V28 RAF, and MEAT checklist →
MEAT Criteria for H40.232
For H40.232to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed H40.232 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
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What This Code Means
H40.232 is the ICD-10-CM diagnosis code for intermittent angle-closure glaucoma, left eye. A recurring form of glaucoma in the left eye where the drainage angle periodically closes, causing temporary increases in eye pressure. H40.232 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering glaucoma (h40-h42).
H40.232 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
In the RxHCC model, H40.232 maps to RxHCC 244 (Glaucoma, Other) with a RAF weight of 0.0. No V28, V24, or ESRD HCC mappings exist. The RxHCC 244 mapping is specific to angle-closure and other glaucoma types, distinguishing the medication management profile from open-angle glaucoma (RxHCC 243).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H40.232 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Distinguish this from acute angle-closure glaucoma; intermittent episodes may resolve spontaneously or with treatment
- •Document the frequency and severity of episodes to support medical necessity for ongoing management
Clinical Significance
Intermittent angle-closure glaucoma of the left eye represents periodic angle closure in the left eye with episodic intraocular pressure elevation. Like the right eye counterpart, this condition requires identification and prophylactic treatment to prevent progression to acute angle-closure crisis. Bilateral assessment is important since anatomical predisposition to angle closure often affects both eyes.
Documentation Requirements
- ✓Gonioscopy documenting intermittent angle closure specifically in the left eye
- ✓Intraocular pressure measurements during and between episodes
- ✓Symptom documentation including episodic visual symptoms
- ✓Optic nerve and visual field assessment for the left eye
- ✓Treatment status including laser peripheral iridotomy
Commonly Confused Codes
- •H40.231: Intermittent angle-closure glaucoma, right eye: contralateral side
- •H40.212: Acute angle-closure glaucoma, left eye: sustained acute closure, more urgent
- •H40.222: Chronic angle-closure glaucoma, left eye: persistent rather than intermittent closure
- •H40.233: Intermittent angle-closure glaucoma, bilateral: use when both eyes are affected