F40.218 ICD-10-CM Code: Other animal type phobia
F40.218 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48)
F40.218
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther animal type phobia
An intense, irrational fear of animals other than spiders, such as dogs, snakes, insects, or birds.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
MappedHCC 133
Code-level coefficient reference
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for F40.218. 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, F40.2
- dysmorphophobia (nondelusional) (F45.22)Inherited from F01-F99, F40.2
- nosophobia (F45.22)Inherited from F01-F99, F40.2
Related Codes
Includes
Official- disorders of psychological developmentInherited from F01-F99
Excludes 1
OfficialNo Excludes 1 notes are included in this display for F40.218. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for F40.218. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for F40.218. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for F40.218. 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 F40.218 an HCC code?
F40.218 has no mapping under the current CMS-HCC V28 community payment model. F40.218 has a separate mapping under the Part D RxHCC model (HCC 133 (Anxiety and Other Psychiatric Disorders)); the applicable result needs member context.
- Code
- F40.218
- Description
- Other animal type phobia
- 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 F40.218 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for F40.218
For F40.218, 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
F40.218 is the ICD-10-CM diagnosis code for other animal type phobia. An intense, irrational fear of animals other than spiders, such as dogs, snakes, insects, or birds. F40.218 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (f40-f48).
F40.218 has no mapping under the current CMS-HCC V28 community payment model. F40.218 has a separate mapping under the Part D RxHCC model (HCC 133 (Anxiety and Other Psychiatric Disorders)); 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.
Use this code for animal phobias not specifically coded elsewhere.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for F40.218 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code for animal phobias not specifically coded elsewhere
- •Specify the animal type in documentation for clarity and clinical reference
Documentation Requirements
- ✓Specific animal or animals feared documented by the provider
- ✓Marked fear or anxiety disproportionate to actual danger posed
- ✓Consistent anxiety response when exposed to or anticipating exposure to the animal
- ✓Active avoidance or endurance with intense distress
- ✓Duration of 6+ months
- ✓Functional impairment documented
Commonly Confused Codes
- •F40.210 (Arachnophobia): Use F40.210 specifically for spider phobia; F40.218 is for all other animal phobias
- •F40.228 (Other natural environment type phobia): Natural environment phobias involve storms, heights, water; animal phobias involve living creatures
- •F40.9 (Phobic anxiety disorder, unspecified): Use F40.218 when the specific animal phobia is documented rather than defaulting to unspecified