F10.121 ICD-10-CM Code: Alcohol abuse with intoxication delirium
F10.121 is not a CMS-HCC payment code. 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)
F10.121
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAlcohol abuse with intoxication delirium
Alcohol abuse accompanied by delirium (confusion, hallucinations, agitation) that occurs during intoxication.
Buddy Insight
This code captures alcohol abuse with intoxication delirium, documenting an acute episode of alcohol intoxication in a patient with an established pattern of alcohol abuse.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
MappedHCC 55
Code-level coefficient reference
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for F10.121. Check the code and parent instructions in the Code Book.
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
Excludes 1
Official- alcohol dependence (F10.2-)Inherited from F10.1
- alcohol use, unspecified (F10.9-)Inherited from F10.1
Code First
OfficialNo Code First sequencing instructions are included in this display for F10.121. Check the code and parent instructions in the Code Book.
Use Additional
Official- code for blood alcohol level, if applicable (Y90.-)Inherited from F10
Code Also
OfficialNo Code Also instructions are included in this display for F10.121. 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 F10.121 an HCC code?
F10.121 has no mapping under the current CMS-HCC V28 community payment model. F10.121 has a separate mapping under the CMS-HCC ESRD model (HCC 55 (Substance Use Disorder/Moderate/Severe/Substance Use with Complications)); the applicable result needs member context.
- Code
- F10.121
- Description
- Alcohol abuse with intoxication delirium
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- 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 F10.121 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for F10.121
For F10.121, 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
F10.121 is the ICD-10-CM diagnosis code for alcohol abuse with intoxication delirium. Alcohol abuse accompanied by delirium (confusion, hallucinations, agitation) that occurs during intoxication. F10.121 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).
F10.121 has no mapping under the current CMS-HCC V28 community payment model. F10.121 has a separate mapping under the CMS-HCC ESRD model (HCC 55 (Substance Use Disorder/Moderate/Severe/Substance Use with Complications)); the applicable result needs member context. Do not assign V28 risk adjustment value from this page; verify the applicable model and payment year before using this code for risk adjustment.
Document the presence of delirium symptoms and their temporal relationship to alcohol intoxication.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for F10.121 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the presence of delirium symptoms and their temporal relationship to alcohol intoxication
- •Distinguish from withdrawal delirium, which occurs when alcohol levels are decreasing
Clinical Significance
This code captures alcohol abuse with intoxication delirium, documenting an acute episode of alcohol intoxication in a patient with an established pattern of alcohol abuse. Intoxication delirium represents a more severe presentation with altered consciousness and cognitive disturbance requiring urgent medical attention. Accurate coding of the use level (abuse) and intoxication status is critical for tracking substance use severity and ensuring appropriate risk adjustment.
Documentation Requirements
- ✓Documentation of a maladaptive pattern of alcohol use with clinically significant impairment or distress (recurrent use causing role failure, hazardous use, legal problems, or social/interpersonal problems)
- ✓Confirmation that criteria for alcohol dependence are NOT met (no tolerance, withdrawal, or compulsive use pattern)
- ✓Documentation of acute intoxication at the time of the encounter, with clinical findings (e.g., blood alcohol level, slurred speech, impaired coordination)
- ✓Documentation of delirium symptoms: acute onset of confusion, altered consciousness, disorientation, agitation, or perceptual disturbances during intoxication
- ✓Assessment and plan addressing alcohol use disorder with treatment recommendations (counseling, medication-assisted treatment, referral, etc.)
Commonly Confused Codes
- •F10.2x: Alcohol dependence codes; dependence is a more severe pattern with tolerance/withdrawal/compulsive use: verify provider intent
- •F10.9x: Alcohol use, unspecified; less specific: always code to the highest documented specificity (abuse > unspecified)
- •F10.220-F10.229: Alcohol dependence with intoxication; check whether the patient meets criteria for dependence vs. abuse