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J66.2 ICD-10-CM Code: Cannabinosis

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
8 Excludes2
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 112

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43, Appendix B.

  • MS-DRG 196 — INTERSTITIAL LUNG DISEASE WITH MCC (MDC 04)
  • MS-DRG 197 — INTERSTITIAL LUNG DISEASE WITH CC (MDC 04)
  • MS-DRG 198 — INTERSTITIAL LUNG DISEASE WITHOUT CC/MCC (MDC 04)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders

Other models: CMS-HCC V22 HCC 112

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for J66.2 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on J66.2 itself; “inherited from” names the category or block whose note applies here.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Coder workflow for J66.2

MedCoder structured workflow — derived from this code’s own official record

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

Official instructions as workflow

  • Excludes2 — not part of J66.2(8 notes)

    Coding workflow: The conditions named in this note are not included in J66.2. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareJ67, J61, J67.1, J67.0, J68.3, J45

    See the official tabular notes · Guidelines I.A.12.b

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Cannabinosis is a billable ICD-10-CM diagnosis code (J66.2).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (1)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name J66.2 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Excludes1 notes: J39.3 — Upper respiratory tract hypersensitivity reaction, site unspecified (via J66.-), J81 — Pulmonary edema (via J66.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 4 Excludes2 notes: J44.1 — Chronic obstructive pulmonary disease with (acute) exacerbation (via J66.-), J44.9 — Chronic obstructive pulmonary disease, unspecified (via J66.-), J45.909 — Unspecified asthma, uncomplicated (via J66.-), J84 — Other interstitial pulmonary diseases (via J66.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 1 Code First instruction: J84.170 — Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere (via J66.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 16 Use Additional Code instructions: T51 — Toxic effect of alcohol (via J66.-), T51-T65 — Toxic effects of substances chiefly nonmedicinal as to source (T51-T65) (via J66.-), T52 — Toxic effect of organic solvents (via J66.-), T53 — Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons (via J66.-), T54 — Toxic effect of corrosive substances (via J66.-), T55 — Toxic effect of soaps and detergents (via J66.-), T56 — Toxic effect of metals (via J66.-), T57 — Toxic effect of other inorganic substances (via J66.-), T58 — Toxic effect of carbon monoxide (via J66.-), T59 — Toxic effect of other gases, fumes and vapors (via J66.-), T60 — Toxic effect of pesticides (via J66.-), T61 — Toxic effect of noxious substances eaten as seafood (via J66.-), T62 — Toxic effect of other noxious substances eaten as food (via J66.-), T63 — Toxic effect of contact with venomous animals and plants (via J66.-), T64 — Toxic effect of aflatoxin and other mycotoxin food contaminants (via J66.-), T65 — Toxic effect of other and unspecified substances (via J66.-).

These codes instruct coders to additionally report this code when it applies.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 196 (MDC 04), DRG 197 (MDC 04), DRG 198 (MDC 04).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):RSP013 — Lung disease due to external agents (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders) for risk-adjusted payment.

J63.1 — Bauxite fibrosis (of lung), J63.2 — Berylliosis, J63.3 — Graphite fibrosis (of lung), J63.4 — Siderosis, J63.5 — Stannosis, J63.6 — Pneumoconiosis due to other specified inorganic dusts, J64 — Unspecified pneumoconiosis, J65 — Pneumoconiosis associated with tuberculosis, J66.0 — Byssinosis, J66.1 — Flax-dressers' disease, J66.8 — Airway disease due to other specific organic dusts, J67.0 — Farmer's lung, J67.1 — Bagassosis, J67.2 — Bird fancier's lung, J67.3 — Suberosis, J67.4 — Maltworker's lung, J67.5 — Mushroom-worker's lung, J67.6 — Maple-bark-stripper's lung, J67.7 — Air conditioner and humidifier lung, J67.8 — Hypersensitivity pneumonitis due to other organic dusts, +58 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Lung Transplant Status/Complications, Cystic Fibrosis, Idiopathic Pulmonary Fibrosis and Lung Involvement in Systemic Sclerosis, Severe Persistent Asthma

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Lung disease due to external agents).

J63.1 — Bauxite fibrosis (of lung), J63.2 — Berylliosis, J63.3 — Graphite fibrosis (of lung), J63.4 — Siderosis, J63.5 — Stannosis, J63.6 — Pneumoconiosis due to other specified inorganic dusts, J64 — Unspecified pneumoconiosis, J65 — Pneumoconiosis associated with tuberculosis, J66.0 — Byssinosis, J66.1 — Flax-dressers' disease, J66.8 — Airway disease due to other specific organic dusts, J67.0 — Farmer's lung, J67.1 — Bagassosis, J67.2 — Bird fancier's lung, J67.3 — Suberosis, J67.4 — Maltworker's lung, J67.5 — Mushroom-worker's lung, J67.6 — Maple-bark-stripper's lung, J67.7 — Air conditioner and humidifier lung, J67.8 — Hypersensitivity pneumonitis due to other organic dusts, +24 more

Contextual Map

Every relationship of J66.2 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run J66.2 with these 15 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Referenced by Code First instructions

Referenced by Use Additional Code instructions (16)

  • T51 — Toxic effect of alcohol[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • T51-T65 — Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • T52 — Toxic effect of organic solvents[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • T53 — Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • T54 — Toxic effect of corrosive substances[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • T55 — Toxic effect of soaps and detergents[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • T56 — Toxic effect of metals[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • T57 — Toxic effect of other inorganic substances[Use Additional Code](via J66.-): “for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
  • and 8 more

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 280 — Chronic Obstructive Pulmonary Disease, Interstitial Lung Disorders, and Other Chronic Lung Disorders [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper

MDC crossing

  • MDC 04 — Diseases and Disorders of the Respiratory System[MDC crossing]: “Diseases and Disorders of the Respiratory System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 3,998 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

  • Cannabinosis[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "J66.2 — Cannabinosis." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/j66.2-cannabinosis

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Cannabinosis

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to J66.2 in its code family, with their registry titles.

View all codes in the J66 family