2027 ICD-10-CM Diagnosis Code F70Mild intellectual disabilities
ICD-10-CM Codes›F01–F99›F70-F79›F70
- Billable — Valid for Submission
- Chronic Condition
F70 is a billable ICD-10-CM diagnosis code for mild intellectual disabilities. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 884. Coders also document this condition as micrognathia, recurrent infections, behavioral abnormalities, mild intellectual disability syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neurodevelopmental disorders.
F70 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 148 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F70 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Micrognathia, recurrent infections, behavioral abnormalities, mild intellectual disability syndrome
- Mild intellectual disability
- Primary microcephaly, mild intellectual disability, young-onset diabetes syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F70: its own notes plus those printed at block F70-F79 and Chapter 5. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- disorders of psychological development
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- IQ level 50-55 to approximately 70
- Mild mental subnormality
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- borderline intellectual functioning, IQ above 70 to 84 (R41.83)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Code First
The underlying condition named in the note is sequenced before this code.
- any associated physical or developmental disorders
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F70, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming F70: they are not reported together with it, unless the two conditions are unrelated.
- R41.83 Borderline intellectual functioning
Excludes2 4
These codes carry an Excludes2 note naming F70: its condition is not part of those codes, and both may be reported when the patient has both.
Code First 1
These codes say to code first a condition named in the note, and F70 is one of the conditions named.
- Z91.83 Wandering in diseases classified elsewhere
Use Additional Code 5
These codes say to use an additional code from the note, and F70 is one of the codes named.
Code Also 4
These codes say F70 may also be needed to fully describe the condition. The note gives no sequencing direction.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Feeble-minded F70
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Developmental Disabilities
Developmental disabilities are conditions that are usually present at birth. They can affect a child's growth and development. These conditions can cause physical, learning, language, or behavior issues. They can include:
The full article covers:
- What are developmental disabilities?
- What causes developmental disabilities?
- How are developmental disabilities diagnosed?
- What are the treatments for developmental disabilities?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F70 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F70Overview
What is the ICD-10 code for mild intellectual disabilities?
The ICD-10-CM code for mild intellectual disabilities is F70. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is F70 (Mild intellectual disabilities) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report mild intellectual disabilities on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does F70 group to?
When mild intellectual disabilities is the principal diagnosis on an inpatient stay, it groups to MS-DRG 884 (organic Disturbances and Intellectual Disability), which carries a relative weight of 1.5998. Higher weights mean higher Medicare reimbursement.
Can F70 be reported with R41.83?
Not as a rule. The Excludes1 note at block F70-F79, which applies to F70, lists "borderline intellectual functioning, IQ above 70 to 84 (R41.83)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of F70?
Under the General Equivalence Mappings, mild intellectual disabilities converts to ICD-9-CM 317 (mild intellect disabilty). The mapping is a direct match.
Does F70 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: F70 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 148 (Mild or Unspecified Intellectual Disability/Developmental Disorder).
