F15.10 ICD-10-CM Code: Other stimulant abuse, uncomplicated
F15.10 maps to CMS-HCC V28 138. A source-labeled RAF reference is available. Documentation must support MEAT. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Mental and behavioral disorders due to psychoactive substance use (F10-F19)
F15.10
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther stimulant abuse, uncomplicated
Abuse of stimulant drugs other than cocaine (such as amphetamines or prescription stimulants) without complications.
Buddy Insight
Other stimulant abuse, uncomplicated captures abuse of stimulant drugs other than cocaine, including amphetamines, methamphetamine, prescription stimulants (such as methylphenidate or dextroamphetamine), and caffeine-type stimulants.
CMS-HCC V28
MappedHCC 138
Code-level coefficient reference
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- Amphetamine type substance use disorder, mild
- Other or unspecified stimulant use disorder, mild
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for F15.10 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for F15.10 in this effective period.
Excludes 1
Official- other stimulant dependence (F15.2-)
- other stimulant use, unspecified (F15.9-)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for F15.10 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for F15.10 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for F15.10 in this effective period.
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 F15.10 an HCC code?
Yes. F15.10 (Other stimulant abuse, uncomplicated) 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: F15.10 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
- F15.10
- Description
- Other stimulant abuse, uncomplicated
- 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 F15.10 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT Criteria for F15.10
For F15.10 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- 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
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed F15.10 during that encounter, not just copy-forwarded from a problem list.
Coder workflow notes
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What This Code Means
F15.10 is the ICD-10-CM diagnosis code for other stimulant abuse, uncomplicated. Abuse of stimulant drugs other than cocaine (such as amphetamines or prescription stimulants) without complications. F15.10 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, F15.10 maps to Drug Use Disorder, Mild, Uncomplicated, Except Cannabis (HCC 138) with a source-labeled community, non-dual, aged reference coefficient of 0.423. No V24 mapping is shown for F15.10; use the applicable model and payment year when reviewing the V28 mapping. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. 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.
Other stimulant abuse, uncomplicated, captures amphetamine, methamphetamine, and related stimulants. Provider narrative must identify the stimulant class. Because F15.10 maps to an HCC category, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) before the diagnosis is used for risk adjustment. 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 F15.10 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Other stimulant abuse, uncomplicated, captures amphetamine, methamphetamine, and related stimulants. Provider narrative must identify the stimulant class.
- •Do not use F15.10 for cocaine, that is F14.*. The F15.* family is for other stimulants including prescription stimulants misused.
- •Methamphetamine use has risen in some Medicare populations, and uncomplicated abuse maps to the mild drug-use HCC.
Clinical Significance
Other stimulant abuse, uncomplicated captures abuse of stimulant drugs other than cocaine, including amphetamines, methamphetamine, prescription stimulants (such as methylphenidate or dextroamphetamine), and caffeine-type stimulants. This code is significant for risk adjustment as stimulant abuse is a growing public health concern, particularly methamphetamine. Uncomplicated means no intoxication, withdrawal, or induced disorders are present at the time of the encounter, but the abuse pattern itself requires monitoring and intervention.
Documentation Requirements
- ✓Provider documentation specifying stimulant abuse (not dependence)
- ✓Identification of the specific stimulant being abused when possible (amphetamine, methamphetamine, prescription stimulant)
- ✓Documentation establishing an abuse pattern per DSM-5 criteria
- ✓Confirmation that no current complications (intoxication, withdrawal, induced disorders) are present
- ✓Current treatment plan or referral for substance abuse treatment
Commonly Confused Codes
- •F15.20: Other stimulant dependence, uncomplicated: use when the pattern meets dependence criteria (more severe)
- •F15.11: Other stimulant abuse, in remission: use when the patient is in recovery from stimulant abuse
- •F14.10: Cocaine abuse, uncomplicated: cocaine has its own code series (F14); this code is for OTHER stimulants
- •F15.90: Other stimulant use, unspecified, uncomplicated: use when abuse vs. dependence cannot be determined
- •F15.120: Other stimulant abuse with intoxication, uncomplicated: use when intoxication is present