J66.2 ICD-10-CM Code: Cannabinosis
J66.2 maps to CMS-HCC V28 280 (RAF 0.319). Documentation must support MEAT. MEAT criteria · RAF calculator · free HCC coding tools
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FY 2026 Apr update / Diseases of the respiratory system (J00-J99) / Lung diseases due to external agents (J60-J70)
J66.2
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCannabinosis
A lung disease caused by inhaling cannabis dust or particles, resulting in airway inflammation. This may occur in workers involved in cannabis cultivation, processing, or handling.
Buddy Insight
Cannabinosis is an occupational lung disease caused by industrial cannabis (hemp) dust exposure, distinct from recreational cannabis use complications.
CMS-HCC V28
MappedHCC 280
RAF 0.319
CMS-HCC V24
MappedHCC 112
RAF 0.219
ACA/HHS
MappedHCC 162
Varies by metal level
ESRD/PACE
MappedHCC 112
RAF 0.058
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for J66.2 in this effective period.
Excludes 2
Official- allergic alveolitis (J67.-)
- asbestosis (J61)
- bagassosis (J67.1)
- farmer's lung (J67.0)
- hypersensitivity pneumonitis due to organic dust (J67.-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for J66.2 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for J66.2 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for J66.2 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for J66.2 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for J66.2 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
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 J66.2 an HCC code?
Yes. J66.2 (Cannabinosis) maps to Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders under the CMS-HCC V28 risk adjustment model (and Fibrosis of Lung and Other Chronic Lung Disorders under V24), with a community non-dual aged RAF of 0.319. It is billable for payment year 2026.
Coder answer: J66.2 is billable and maps to V28 HCC 280, Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- J66.2
- Description
- Cannabinosis
- HCC (V28)
- HCC 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders
- RAF
- 0.319
- 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 J66.2 in the Code Book — tabular path, V28 RAF, and MEAT checklist →
MEAT Criteria for J66.2
For J66.2 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 J66.2 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
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What This Code Means
J66.2 is the ICD-10-CM diagnosis code for cannabinosis. A lung disease caused by inhaling cannabis dust or particles, resulting in airway inflammation. This may occur in workers involved in cannabis cultivation, processing, or handling. J66.2 sits in the ICD-10-CM chapter for diseases of the respiratory system (j00-j99), within the section covering lung diseases due to external agents (j60-j70).
Under the CMS-HCC V28 risk adjustment model, J66.2 maps to Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders (HCC 280) with a community, non-dual, aged base RAF weight of 0.319. Under the older CMS-HCC V24 model, J66.2 maps to Fibrosis of Lung and Other Chronic Lung Disorders (HCC 112) with a community, non-dual, aged base RAF weight of 0.219. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Document the specific occupational exposure to cannabis dust or smoke inhalation. Because J66.2 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for J66.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the specific occupational exposure to cannabis dust or smoke inhalation
- •Ensure this is occupational exposure; distinguish from recreational cannabis use complications
Clinical Significance
Cannabinosis is an occupational lung disease caused by industrial cannabis (hemp) dust exposure, distinct from recreational cannabis use complications. It is relevant for risk adjustment as it represents a chronic occupational respiratory condition requiring medical management, though it is relatively rare in current clinical practice.
Documentation Requirements
- ✓Documented occupational exposure to cannabis (hemp) dust in cultivation, processing, or handling operations
- ✓Clear distinction between occupational hemp dust exposure and recreational cannabis use
- ✓Chest imaging findings and pulmonary function test results
- ✓Duration and intensity of occupational exposure
- ✓Current respiratory symptoms and functional status
- ✓Treatment plan and workplace modifications
Commonly Confused Codes
- •J66.0 (Byssinosis): cotton/flax/hemp textile dust generally; cannabinosis is specific to cannabis/hemp dust
- •F12.x (Cannabis-related disorders): recreational use complications, not occupational dust disease
- •J66.8 (Airway disease due to other specific organic dusts): use J66.2 when cannabis/hemp dust is identified
- •J66.1 (Flax-dressers' disease): flax fiber, not hemp/cannabis fiber