H40.849 ICD-10-CM Code: Neovascular secondary angle closure glaucoma, unspecified eye
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Glaucoma (H40-H42)
H40.849
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceNeovascular secondary angle closure glaucoma, unspecified eye
A type of glaucoma caused by abnormal blood vessel growth that blocks fluid drainage, but the specific eye affected is not documented.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
MappedHCC 243
RAF 0.196
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for H40.849 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H40.849 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H40.849 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H40.849 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H40.849 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H40.849 in this effective period.
Code Also
Official- the underlying condition such as:
- central retinal vein occlusion (H34.81)
- diabetes mellitus (E08.39, E09.39, E10.39, E11.39, E13.39)
- retinal ischemia (H35.82)
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is H40.849 an HCC code?
H40.849 is not in the CMS-HCC V28 or V24 community payment model, but it does map to Glaucoma under the Part D RxHCC model.
- Code
- H40.849
- Description
- Neovascular secondary angle closure glaucoma, unspecified eye
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. 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 H40.849 in the Code Book — tabular path, V28 RAF, and MEAT checklist →
MEAT Criteria for H40.849
For H40.849 to 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 H40.849 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
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What This Code Means
H40.849 is the ICD-10-CM diagnosis code for neovascular secondary angle closure glaucoma, unspecified eye. A type of glaucoma caused by abnormal blood vessel growth that blocks fluid drainage, but the specific eye affected is not documented. H40.849 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering glaucoma (h40-h42).
H40.849 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.
Use only when laterality cannot be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H40.849 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use only when laterality cannot be determined from documentation
- •Query the provider to determine if one or both eyes are affected for more specific coding