ICD-10 F18.120
Billable / Specific HCC v28: 55Inhalant abuse with intoxication, uncomplicated
About ICD-10-CM F18.120
ICD-10-CM code F18.120 represents Inhalant abuse with intoxication, uncomplicated. This is a billable/specific code in the Mental, Behavioral, and Neurodevelopmental chapter (block F18). The 2026 edition of ICD-10-CM F18.120 became effective on October 1, 2025.
Coding Tips for F18.120
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
F18.120 is a CMS-HCC v28 risk-adjustment code (category 55). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for F18.120
Local Coverage Determinations (LCDs) from CMS MACs that list F18.120 as a covered diagnosis.
Showing top 10 of 392 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing F18.120.
5 Medicare
1 Aetna
CPT Codes Commonly Billed with F18.120
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- G0480 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- 80306 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- G0482 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- 0603U CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- 80305 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- G0659 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- G0483 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- 80307 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- G0481 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
- 80323 CMS LCD: Billing and Coding: Urine Drug Testing CMS LCD
Convert F18.120 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| F18.120 | 2922 | 10000 |
| F18.120 | 30590 | 10000 |
| F18.120 | 30591 | 10000 |
| F18.120 | 30592 | 10000 |
| F18.120 | 30593 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To F18.120
Other codes in section F10-F19 (Mental and behavioral disorders due to psychoactive substance use).
ICD-10 F18.120, Billing FAQ
Is ICD-10 code F18.120 billable? +
Yes, F18.120 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does F18.120 affect Medicare Advantage HCC risk adjustment? +
Yes. F18.120 maps to CMS-HCC v28 category 55. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with F18.120? +
Procedures frequently paired with F18.120 include: G0480, 80306, G0482, 0603U, 80305.
What ICD-9 codes does F18.120 map to? +
Per CMS GEMs, F18.120 maps to ICD-9 codes: 2922, 30590, 30591, 30592, 30593. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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