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ICD-10-CM 2027

ICD-10 code for intellectual disability

F79

Unspecified intellectual disabilities

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Disability, disabilities › intellectual”. Page updated September 29, 2026.

About coding intellectual disability

The ICD-10-CM code for intellectual disability is F79 (Unspecified intellectual disabilities). The official index lists 31 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F79.

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.

More specific intellectual disability codes (official index)

  • with
  • autistic features F84.9 — Pervasive developmental disorder, unspecified
  • pathogenic CHAMP1 (genetic) (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic HNRNPH2 (genetic) (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic SATB2 (genetic) (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic SETBP1 (genetic) (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic STXBP1 (genetic) (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic SYNGAP1 (genetic) (variant) F78.A1 — SYNGAP1-related intellectual disability
  • autosomal dominant F78.A9 — Other genetic related intellectual disability
  • autosomal recessive F78.A9 — Other genetic related intellectual disability
  • genetic related F78.A9 — Other genetic related intellectual disability
  • with
  • pathogenic CHAMP1 (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic HNRNPH2 (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic SATB2 (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic SETBP1 (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic STXBP1 (variant) F78.A9 — Other genetic related intellectual disability
  • pathogenic SYNGAP1 (variant) F78.A1 — SYNGAP1-related intellectual disability
  • specified NEC F78.A9 — Other genetic related intellectual disability
  • SYNGAP1-related F78.A1 — SYNGAP1-related intellectual disability
  • in
  • autosomal dominant mental retardation F78.A9 — Other genetic related intellectual disability
  • autosomal recessive mental retardation F78.A9 — Other genetic related intellectual disability
  • SATB2-associated syndrome F78.A9 — Other genetic related intellectual disability
  • SETBP1 disorder F78.A9 — Other genetic related intellectual disability
  • STXBP1 encephalopathy with epilepsy F78.A9 — Other genetic related intellectual disability
  • X-linked mental retardation (syndromic) (Bain type) F78.A9 — Other genetic related intellectual disability
  • mild (I.Q.50-69) F70 — Mild intellectual disabilities
  • moderate (I.Q.35-49) F71 — Moderate intellectual disabilities
  • profound (I.Q. under 20) F73 — Profound intellectual disabilities
  • severe (I.Q.20-34) F72 — Severe intellectual disabilities
  • specified level NEC F78.A9 — Other genetic related intellectual disability
  • SYNGAP1-related F78.A1 — SYNGAP1-related intellectual disability
  • X-linked (syndromic) (Bain type) F78.A9 — Other genetic related intellectual disability

Common questions about intellectual disability ICD-10 codes

What is the ICD-10 code for intellectual disability?

F79 — Unspecified intellectual disabilities. More specific codes apply when the documentation supports them: F84.9, F78.A9, F78.A9, F78.A9 and others below.

What is the ICD-10 code for autosomal dominant intellectual disability?

F78.A9 — Other genetic related intellectual disability.

What is the ICD-10 code for autosomal recessive intellectual disability?

F78.A9 — Other genetic related intellectual disability.

What is the ICD-10 code for genetic related intellectual disability?

F78.A9 — Other genetic related intellectual disability.

What is the ICD-10 code for mild intellectual disability?

F70 — Mild intellectual disabilities.

What is the ICD-10 code for moderate intellectual disability?

F71 — Moderate intellectual disabilities.

What is the ICD-10 code for profound intellectual disability?

F73 — Profound intellectual disabilities.

Is F79 billable?

Yes. F79 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F79 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F79 as a principal diagnosis.

Is F79 a CC or MCC?

No. F79 is neither a CC nor an MCC under MS-DRG v44.0.