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F18.188 ICD-10-CM Code: Inhalant abuse with other inhalant-induced disorder

F18.188 maps to CMS-HCC V28 137. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupF18.188

FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Mental and behavioral disorders due to psychoactive substance use (F10-F19)

F18.188

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

Inhalant abuse with other inhalant-induced disorder

A person who abuses inhalants and has developed other mental or physical health problems directly caused by the inhalant use, not including anxiety or mood disorders.

Buddy the Bee presenting code insight

Buddy Insight

Inhalant abuse with other induced disorders captures conditions like inhalant-induced sleep disorders, sexual dysfunction, or other neurological effects not classified under mood, anxiety, psychotic, or dementia categories.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 137

Coefficient HCC 137: 0.424 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

HCC 082

Code-level coefficient reference

ESRD/PACE

HCC 55

Code-level coefficient reference

RXHCC

N/A

—

Not mapped

Code Book Path

Official
F18.1Inhalant abuseF18.18Inhalant abuse with other inhalant-induced disordersF18.188Inhalant abuse with other inhalant-induced disorder

Inclusion Terms

Official
  • Inhalant use disorder, mild, with inhalant induced mild neurocognitive disorder

Excludes 2

Official
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)Inherited from F01-F99

Related Codes

Official
F18.180Inhalant abuse with inhalant-induced anxiety disorder

Includes

Official
  • disorders of psychological developmentInherited from F01-F99, F18
  • volatile solventsInherited from F01-F99, F18

Excludes 1

Official
  • inhalant dependence (F18.2-)Inherited from F18.1
  • inhalant use, unspecified (F18.9-)Inherited from F18.1

Code First

Official

No Code First sequencing instructions are included in this display for F18.188. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for F18.188. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for F18.188. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance
Documentation of inhalant abuse
Specific identification of the induced disorder
Causal link between inhalant use and the condition
Evidence the disorder does not fit mood, anxiety, psychotic, or dementia categories

MEAT Support

HCC Buddy guidance
Documentation of inhalant abuse
Specific identification of the induced disorder
Causal link between inhalant use and the condition
Evidence the disorder does not fit mood, anxiety, psychotic, or dementia categories

Audit Caution

HCC Buddy guidance
Using this code when a more specific induced disorder category exists
Not documenting what the 'other' induced disorder is
Confusing 'other specified' with 'unspecified'
Missing organ-specific damage codes that should be reported additionally

Common Mistakes

HCC Buddy guidance
F18.19 — With unspecified induced disorder; use only when disorder cannot be identified
F18.14 — With induced mood disorder; use when mood symptoms predominate
F18.180 — With induced anxiety disorder; use when anxiety is the complication
F18.288 — Inhalant dependence with other induced disorder; use when dependence documented

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 F18.188 an HCC code?

Yes. F18.188 (Inhalant abuse with other inhalant-induced disorder) maps to HCC 137, Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.424. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: F18.188 is billable and maps to V28 HCC 137, Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code
F18.188
Description
Inhalant abuse with other inhalant-induced disorder
HCC (V28)
HCC 137 — Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications
RAF reference coefficient
0.424
Billable
Yes
Payment year
2026

HCC Category Mapping

V28HCC 137, Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications
0.424
ESRDHCC 55, Substance Use Disorder/Moderate/Severe/Substance Use with Complications
Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. 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 context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work F18.188 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for F18.188

For F18.188, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

  • 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

Coder workflow notes

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What This Code Means

F18.188 is the ICD-10-CM diagnosis code for inhalant abuse with other inhalant-induced disorder. A person who abuses inhalants and has developed other mental or physical health problems directly caused by the inhalant use, not including anxiety or mood disorders. F18.188 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering mental and behavioral disorders due to psychoactive substance use (f10-f19).

Under the CMS-HCC V28 risk adjustment model, F18.188 maps to Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications (HCC 137) with a source-labeled community, non-dual, aged reference coefficient of 0.424. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Use this code when inhalant-induced disorders other than anxiety, mood, or psychotic disorders are present. For F18.188, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. 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, source-labeled coefficient references, and MEAT documentation criteria for F18.188 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •Use this code when inhalant-induced disorders other than anxiety, mood, or psychotic disorders are present
  • •Document the specific inhalant-induced condition in the medical record for clarity

Clinical Significance

Inhalant abuse with other induced disorders captures conditions like inhalant-induced sleep disorders, sexual dysfunction, or other neurological effects not classified under mood, anxiety, psychotic, or dementia categories. Inhalants cause diverse organ toxicity affecting multiple body systems.

Documentation Requirements

  • ✓Documentation of inhalant abuse
  • ✓Specific identification of the induced disorder
  • ✓Causal link between inhalant use and the condition
  • ✓Evidence the disorder does not fit mood, anxiety, psychotic, or dementia categories
  • ✓Clinical assessment supporting the induced condition diagnosis

Commonly Confused Codes

  • •F18.19: With unspecified induced disorder; use only when disorder cannot be identified
  • •F18.14: With induced mood disorder; use when mood symptoms predominate
  • •F18.180: With induced anxiety disorder; use when anxiety is the complication
  • •F18.288: Inhalant dependence with other induced disorder; use when dependence documented

Child Codes

F18.180Inhalant abuse with inhalant-induced anxiety disorder
HCC 137
F18.188Inhalant abuse with other inhalant-induced disorder
HCC 137

Code Hierarchy

└F18Inhalant related disorders└F18.1Inhalant abuse└F18.18Inhalant abuse with other inhalant-induced disorders└F18.188Inhalant abuse with other inhalant-induced disorder
└F18.188Inhalant abuse with other inhalant-induced disorder

Also searched as

  • F18 188
  • F18188

For F18.188, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

F18.188 maps to CMS-HCC V28 category 137, Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for F18.188. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

Work F18.188 in HCC Buddy

Open F18.188 in the Code Book for the full Index-to-Tabular path, MEAT checklist, and V28 HCC mapping, or in the Encoder to code from a keyword search. Pro includes 7 days to try everything, no card required.

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