What is ICD-10 code H40.822?

H40.822 is the ICD-10-CM diagnosis code for Hypersecretion glaucoma, left eye. A type of glaucoma in the left eye caused by the eye producing too much fluid (aqueous humor), leading to increased eye pressure and potential vision damage. H40.822 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. H40.822 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. H40.822 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. H40.822 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for H40.822?

H40.822 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither model rewards H40.822 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a payment HCC.

What should coders know when reporting H40.822?

Confirm left eye involvement is explicitly documented in the medical record Differentiate from hypersecretion in the right eye or bilateral involvement for accurate code selection

H40.822 ICD-10 Code: Hypersecretion glaucoma, left

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupH40.822Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Glaucoma (H40-H42)

H40.822

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Hypersecretion glaucoma, left eye

A type of glaucoma in the left eye caused by the eye producing too much fluid (aqueous humor), leading to increased eye pressure and potential vision damage.

Buddy Insight

Hypersecretion glaucoma is a rare form of glaucoma caused by overproduction of aqueous humor by the ciliary body, rather than impaired outflow.

CMS-HCC V28

Not risk-adjusted for this model/period.

RAF 0

CMS-HCC V24

Not risk-adjusted for this model/period.

RAF 0

ACA/HHS

Not risk-adjusted for this model/period.

RAF 0

ESRD/PACE

Not risk-adjusted for this model/period.

RAF 0

RXHCC

Mapped

HCC 244

Glaucoma, Other

RAF 0.0

Code Trumping

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Code Book Path

Official

H40.8Other glaucoma

H40.82Hypersecretion glaucoma

H40.822Hypersecretion glaucoma, left eye

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for H40.822 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for H40.822 in this effective period.

Related Child Codes

Official

H40.821Hypersecretion glaucoma, right eye

H40.823Hypersecretion glaucoma, bilateral

H40.829Hypersecretion glaucoma, unspecified eye

Includes

Official

ICD-10-CM does not list Includes notes for H40.822 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for H40.822 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for H40.822 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for H40.822 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for H40.822 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Laterality clearly specified as left 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)

MEAT Support

HCC Buddy guidance

Laterality clearly specified as left 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)

Audit Caution

HCC Buddy guidance

Defaulting to primary open-angle glaucoma when hypersecretion is the documented mechanism — these are clinically distinct entities

Confusing hypersecretion with aqueous misdirection (malignant glaucoma) — different pathophysiology and treatment

Failing to document the specific diagnostic workup that differentiates hypersecretion from other glaucoma types

Using unspecified eye when laterality is available in the record

Common Mistakes

HCC Buddy guidance

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)

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 H40.822 an HCC code?

No. H40.822 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

HCC Category Mapping

RxHCCHCC 244, Glaucoma, Other

0.000

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 H40.822

For H40.822to 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 H40.822 during that encounter, not just copy-forwarded from a problem list.

What This Code Means

H40.822 is the ICD-10-CM diagnosis code for hypersecretion glaucoma, left eye. A type of glaucoma in the left eye caused by the eye producing too much fluid (aqueous humor), leading to increased eye pressure and potential vision damage. H40.822 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering glaucoma (h40-h42).

H40.822 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 H40.822 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Confirm left eye involvement is explicitly documented in the medical record
•Differentiate from hypersecretion in the right eye or bilateral involvement for accurate code selection

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 left 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)