Skip to content
Dx

ICD-10-CM 2027 diagnosis code

F70Mild intellectual disabilities

✓ Billable / specific

F70 is a valid, billable ICD-10-CM code for mild intellectual disabilities. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Moron, ICD-10 code for Feeble-minded.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F70

F70 is the ICD-10-CM diagnosis code for mild intellectual disabilities. It belongs to block F70-F79 (intellectual Disabilities) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 884 (Organic Disturbances and Intellectual Disability, relative weight 1.6001), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 317 (mild intellectual disabilities).

Coding notes

Applicable toConditions and synonyms classified to this code
  • IQ level 50-55 to approximately 70
  • Mild mental subnormality

Notes that apply from higher levels

Instructions written at a parent level also apply to F70.

Broader instructions also apply from F70-F79 Intellectual Disabilities and Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to F70.

Codes whose notes reference F70

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 317Mild intellectual disabilitiesexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about F70

Is F70 billable?

Yes. F70 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F70 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F70 as a principal diagnosis.

Is F70 a CC or MCC?

No. F70 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F70 group to?

F70 is used in the MS-DRG v44.0 logic for MS-DRG 884 (Organic Disturbances and Intellectual Disability). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for F70?

The CMS General Equivalence Mappings map F70 to ICD-9-CM 317.