F18.11 ICD-10-CM Code: Inhalant abuse, in remission
F18.11 maps to CMS-HCC V28 138. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Mental and behavioral disorders due to psychoactive substance use (F10-F19)
F18.11
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceInhalant abuse, in remission
A person previously abused inhalants but is now in remission, meaning they have stopped using or are in recovery.
Buddy Insight
Inhalant abuse in remission indicates a patient who previously met criteria for inhalant abuse but has achieved sustained abstinence.
CMS-HCC V28
MappedHCC 138
Coefficient HCC 138: 0.423 (Community Non-Dual Aged (CNA))
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
MappedHCC 56
Code-level coefficient reference
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Inhalant use disorder, mild, in early remission
- Inhalant use disorder, mild, in sustained remission
Excludes 2
Official- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)Inherited from F01-F99
Related Codes
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
OfficialNo Code First sequencing instructions are included in this display for F18.11. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for F18.11. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for F18.11. Check the code and parent instructions in the Code Book.
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 F18.11 an HCC code?
Yes. F18.11 (Inhalant abuse, in remission) maps to HCC 138, Drug Use Disorder, Mild, Uncomplicated, Except Cannabis under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.423. 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: F18.11 is billable and maps to V28 HCC 138, Drug Use Disorder, Mild, Uncomplicated, Except Cannabis. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- F18.11
- Description
- Inhalant abuse, in remission
- HCC (V28)
- HCC 138 — Drug Use Disorder, Mild, Uncomplicated, Except Cannabis
- RAF reference coefficient
- 0.423
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
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 F18.11 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for F18.11
For F18.11, 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
Get the V28 mapping + MEAT cheat sheet
One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
F18.11 is the ICD-10-CM diagnosis code for inhalant abuse, in remission. A person previously abused inhalants but is now in remission, meaning they have stopped using or are in recovery. F18.11 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, F18.11 maps to Drug Use Disorder, Mild, Uncomplicated, Except Cannabis (HCC 138) with a source-labeled community, non-dual, aged reference coefficient of 0.423. 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.
Only assign this code when documentation explicitly states the patient is in remission or sustained recovery. For F18.11, 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 F18.11 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Only assign this code when documentation explicitly states the patient is in remission or sustained recovery
- •This code indicates the abuse disorder is no longer active, though history of abuse may still be relevant
Clinical Significance
Inhalant abuse in remission indicates a patient who previously met criteria for inhalant abuse but has achieved sustained abstinence. Given the severe neurotoxic and cardiotoxic effects of inhalants, remission monitoring is important for detecting residual organ damage and preventing relapse.
Documentation Requirements
- ✓Documentation of prior inhalant abuse diagnosis
- ✓Provider statement that the patient is in remission
- ✓Duration and type of remission (early vs sustained)
- ✓Ongoing monitoring plan for residual effects (neurocognitive testing, cardiac monitoring)
- ✓Relapse prevention strategy documented
Commonly Confused Codes
- •F18.10: Inhalant abuse, uncomplicated; use for active abuse without complications
- •F18.21: Inhalant dependence, in remission; use when the prior condition was dependence
- •Z86.59: Personal history of other mental and behavioral disorders; less specific and does not capture HCC
- •F18.90: Inhalant use, unspecified; does not capture abuse or remission status