F70
BillableMild intellectual disabilities
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is F70 an HCC code?
No. F70 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for F70
For F70to 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 F70 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
F70 is the ICD-10-CM diagnosis code for mild intellectual disabilities. A developmental condition where a person has mild intellectual disability, meaning they have below-average intellectual functioning and adaptive behavior limitations but can often live independently with some support. F70 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering intellectual disabilities (f70-f79).
F70 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
F70 does not map to any HCC in V28 or V24 models and has no RAF score impact for Medicare Advantage. RxHCC maps to RxHCC 148 (0.000 weight). While not directly affecting risk adjustment, documentation is essential for care management and identifying patients needing additional support.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for F70 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify IQ testing results and adaptive functioning assessments are documented
- •Confirm the condition originated during the developmental period (before age 18)
Clinical Significance
Mild intellectual disability represents an IQ range of approximately 50-69, with the individual typically able to acquire practical skills and functional literacy but requiring some support in complex daily living tasks. These patients have increased healthcare needs related to communication barriers, difficulty understanding medical instructions, and higher rates of comorbid psychiatric and medical conditions. Proper coding supports appropriate care coordination.
Documentation Requirements
- ✓Provider documentation of intellectual disability with specification of severity as mild
- ✓Formal cognitive testing results (IQ approximately 50-69) or clinical assessment supporting the severity level
- ✓Documentation of adaptive functioning deficits in conceptual, social, or practical domains
- ✓Assessment of the impact on the patient's ability to manage their healthcare and daily living activities
- ✓Documentation of any comorbid conditions and current support services
Commonly Confused Codes
- •F71 — Moderate intellectual disabilities; moderate ID involves IQ approximately 35-49 with more significant support needs
- •F79 — Unspecified intellectual disabilities; use F70 when mild severity is documented, not the unspecified code
- •F81.x — Specific developmental disorders of scholastic skills; learning disabilities are specific skill deficits, not global intellectual disability
- •F88 — Other disorders of psychological development; developmental delays may not meet criteria for intellectual disability