H40.829
BillableHypersecretion glaucoma, unspecified eye
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is H40.829 an HCC code?
No. H40.829 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.
MEAT Criteria for H40.829
For H40.829to 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 H40.829 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
H40.829 is the ICD-10-CM diagnosis code for hypersecretion glaucoma, unspecified eye. A type of glaucoma caused by excessive production of eye fluid when the specific eye affected is not documented or is unclear. H40.829 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering glaucoma (h40-h42).
H40.829 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.
Maps to RxHCC 244 (Glaucoma, Other) with a RAF weight of 0.000 in the prescription drug model. Does not map to CMS-HCC v28, v24, or ESRD models. The RxHCC mapping reflects the pharmacy cost profile associated with ongoing glaucoma medication management. No hierarchies apply.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H40.829 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use only when laterality is not specified; attempt to query the provider for eye-specific information
- •This is a less specific code; strive to obtain laterality documentation for more precise coding
Clinical Significance
Hypersecretion glaucoma is a rare form of glaucoma caused by overproduction of aqueous humor by the ciliary body, rather than impaired outflow. This distinction is clinically important because standard drainage-focused treatments may be less effective. Accurate identification influences treatment selection and helps predict medication response patterns for risk adjustment.
Documentation Requirements
- ✓Laterality clearly specified as unspecified eye
- ✓Documented evidence of aqueous hypersecretion as the mechanism (e.g., fluorophotometry or clinical assessment)
- ✓Intraocular pressure measurement with documented elevation
- ✓Open angle confirmed on gonioscopy (to differentiate from angle-closure mechanisms)
- ✓Optic nerve head evaluation and cup-to-disc ratio
- ✓Ruling out other causes of elevated intraocular pressure
- ✓Treatment plan addressing the hypersecretory mechanism
Commonly Confused Codes
- •H40.10-H40.14 — Primary open-angle glaucoma (outflow problem, not hypersecretion)
- •H40.811-H40.819 — Glaucoma with increased episcleral venous pressure (venous outflow issue, not overproduction)
- •H40.831-H40.839 — Aqueous misdirection (aqueous goes to wrong compartment, not overproduced)
- •H40.89 — Other specified glaucoma (use the more specific hypersecretion code when documented)