What is ICD-10 code F72?

F72 is the ICD-10-CM diagnosis code for Severe intellectual disabilities. A developmental condition where a person has severe intellectual disability, meaning they have significantly below-average intellectual functioning and require substantial support for daily living activities. F72 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. F72 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. F72 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. F72 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for F72?

F72 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither model rewards F72 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a payment HCC.

What should coders know when reporting F72?

Document IQ scores and adaptive functioning assessments that support severe level classification Note the extent of support needed for self-care, communication, and safety

F72 ICD-10 Code: Severe intellectual disabilities

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupF72Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Intellectual Disabilities (F70-F79)

F72

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Severe intellectual disabilities

A developmental condition where a person has severe intellectual disability, meaning they have significantly below-average intellectual functioning and require substantial support for daily living activities.

Buddy Insight

Severe intellectual disability represents an IQ range of approximately 20-34 with very limited language and communication abilities.

CMS-HCC V28

Not risk-adjusted for this model/period.

RAF 0

CMS-HCC V24

Not risk-adjusted for this model/period.

RAF 0

ACA/HHS

Not risk-adjusted for this model/period.

RAF 0

ESRD/PACE

Not risk-adjusted for this model/period.

RAF 0

RXHCC

Mapped

HCC 146

Severe Intellectual Disabilities

RAF 0.0

Code Trumping

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Code Book Path

Official

F7Intellectual Disabilities (F70-F79)

F72Severe intellectual disabilities

Inclusion Terms

Official

IQ 20-25 to 35-40
Severe mental subnormality

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for F72 in this effective period.

Related Child Codes

Official

ICD-10-CM does not list child codes under F72 for this display context.

Includes

Official

ICD-10-CM does not list Includes notes for F72 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for F72 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for F72 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for F72 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for F72 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Provider documentation of intellectual disability with specification of severity as severe

Formal cognitive testing (IQ approximately 20-34) or clinical assessment supporting severe severity

Documentation of extensive adaptive functioning deficits requiring constant supervision

Assessment of communication modality and capacity for healthcare participation

MEAT Support

HCC Buddy guidance

Provider documentation of intellectual disability with specification of severity as severe

Formal cognitive testing (IQ approximately 20-34) or clinical assessment supporting severe severity

Documentation of extensive adaptive functioning deficits requiring constant supervision

Assessment of communication modality and capacity for healthcare participation

Audit Caution

HCC Buddy guidance

Using F79 (unspecified) when severe intellectual disability is clearly documented

Failing to code comorbid conditions (epilepsy, cerebral palsy, behavioral disorders) that are highly prevalent in this population

Not reporting severe ID at encounters where it affects care delivery — it should be captured at every relevant visit

Confusing severity levels — severe requires extensive support for basic self-care activities

Common Mistakes

HCC Buddy guidance

F71 — Moderate intellectual disabilities; moderate ID (IQ 35-49) allows for some independent self-care, unlike severe

F73 — Profound intellectual disabilities; profound ID (IQ below 20) represents even more limited functioning than severe

F79 — Unspecified intellectual disabilities; always use the specified severity code when documented

G80.x — Cerebral palsy; motor impairments in cerebral palsy are separate from intellectual disability even when co-occurring

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is F72 an HCC code?

No. F72 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

HCC Category Mapping

RxHCCHCC 146, Severe Intellectual Disabilities

0.000

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 F72

For F72to 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 F72 during that encounter, not just copy-forwarded from a problem list.

What This Code Means

F72 is the ICD-10-CM diagnosis code for severe intellectual disabilities. A developmental condition where a person has severe intellectual disability, meaning they have significantly below-average intellectual functioning and require substantial support for daily living activities. F72 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering intellectual disabilities (f70-f79).

F72 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.

F72 does not map to any HCC in V28 or V24 models. RxHCC maps to RxHCC 146 (0.000 weight). No direct RAF score impact. Clinical coding remains essential for care coordination and resource allocation for these high-need patients. Coders reviewing F72 should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for F72 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Document IQ scores and adaptive functioning assessments that support severe level classification
•Note the extent of support needed for self-care, communication, and safety

Clinical Significance

Severe intellectual disability represents an IQ range of approximately 20-34 with very limited language and communication abilities. These individuals require extensive daily support for all self-care activities and are unable to live independently. They have high rates of comorbid conditions including epilepsy, motor impairments, and behavioral disorders. Healthcare encounters are complex and require specialized communication approaches.

Documentation Requirements

✓Provider documentation of intellectual disability with specification of severity as severe
✓Formal cognitive testing (IQ approximately 20-34) or clinical assessment supporting severe severity
✓Documentation of extensive adaptive functioning deficits requiring constant supervision
✓Assessment of communication modality and capacity for healthcare participation
✓Documentation of caregiving arrangements, guardianship status, and multidisciplinary support team

Commonly Confused Codes

•F71: Moderate intellectual disabilities; moderate ID (IQ 35-49) allows for some independent self-care, unlike severe
•F73: Profound intellectual disabilities; profound ID (IQ below 20) represents even more limited functioning than severe
•F79: Unspecified intellectual disabilities; always use the specified severity code when documented
•G80.x: Cerebral palsy; motor impairments in cerebral palsy are separate from intellectual disability even when co-occurring

Code Hierarchy

└F72Severe intellectual disabilities

F72 ICD-10-CM Code: Severe intellectual disabilities

HCC Buddy Code Card

F72

Is F72 an HCC code?

HCC Category Mapping

MEAT Criteria for F72

What This Code Means

Coding Tips

Clinical Significance

Documentation Requirements

Commonly Confused Codes

Code Hierarchy

Open F72 in the Interactive Encoder