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F78.A9 ICD-10-CM Code: Other genetic related intellectual disability

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 884 — ORGANIC DISTURBANCES AND INTELLECTUAL DISABILITY (MDC 19)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Other genetic related intellectual disability is a billable ICD-10-CM diagnosis code (F78.A9).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for F78.A9 in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Code First

Underlying conditions that must be sequenced before this code.

  • any associated physical or developmental disorders

Code Also

Additional codes that may be required to fully describe the encounter.

  • Code also, if applicable, any associated disorders

Indexed Clinical Terms (22)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Disability, disabilities, intellectual, autosomal dominant
  • Disability, disabilities, intellectual, autosomal recessive
  • Disability, disabilities, intellectual, genetic related
  • Disability, disabilities, intellectual, genetic related, specified NEC
  • Disability, disabilities, intellectual, genetic related, with, pathogenic CHAMP1 (variant)
  • Disability, disabilities, intellectual, genetic related, with, pathogenic HNRNPH2 (variant)
  • Disability, disabilities, intellectual, genetic related, with, pathogenic SATB2 (variant)
  • Disability, disabilities, intellectual, genetic related, with, pathogenic SETBP1 (variant)
  • Disability, disabilities, intellectual, genetic related, with, pathogenic STXBP1 (variant)
  • Disability, disabilities, intellectual, in, autosomal dominant mental retardation
  • Disability, disabilities, intellectual, in, autosomal recessive mental retardation
  • Disability, disabilities, intellectual, in, SATB2-associated syndrome
  • Disability, disabilities, intellectual, in, SETBP1 disorder
  • Disability, disabilities, intellectual, in, STXBP1 encephalopathy with epilepsy
  • Disability, disabilities, intellectual, in, X-linked mental retardation (syndromic) (Bain type)
  • Disability, disabilities, intellectual, specified level NEC
  • Disability, disabilities, intellectual, with, pathogenic CHAMP1 (genetic) (variant)
  • Disability, disabilities, intellectual, with, pathogenic HNRNPH2 (genetic) (variant)
  • Disability, disabilities, intellectual, with, pathogenic SATB2 (genetic) (variant)
  • Disability, disabilities, intellectual, with, pathogenic SETBP1 (genetic) (variant)
  • Disability, disabilities, intellectual, with, pathogenic STXBP1 (genetic) (variant)
  • Disability, disabilities, intellectual, X-linked (syndromic) (Bain type)

Frequently Compared Codes

The official Excludes notes on F78.A9 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

  • FY2022 — 2021-10-01
    Added to the code set
    Other genetic related intellectual disability
    FY2022 changes

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Relationships & Classification

Potential MS-DRG Relationships (FY2026)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Named in the grouper logic of 1 MS-DRG: DRG 884 (MDC 19).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):MBD014 — Neurodevelopmental disorders (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

F70 — Mild intellectual disabilities, F71 — Moderate intellectual disabilities, F72 — Severe intellectual disabilities, F73 — Profound intellectual disabilities, F78.A1 — SYNGAP1-related intellectual disability, F79 — Unspecified intellectual disabilities, F80.0 — Phonological disorder, F80.1 — Expressive language disorder, F80.2 — Mixed receptive-expressive language disorder, F80.4 — Speech and language development delay due to hearing loss, +284 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Neurodevelopmental disorders).

F71 — Moderate intellectual disabilities, F72 — Severe intellectual disabilities, F73 — Profound intellectual disabilities, F78 — Other intellectual disabilities, F78.A1 — SYNGAP1-related intellectual disability, F79 — Unspecified intellectual disabilities, F80.0 — Phonological disorder, F80.1 — Expressive language disorder, F80.2 — Mixed receptive-expressive language disorder, F80.4 — Speech and language development delay due to hearing loss, +34 more

Contextual Map

Every relationship of F78.A9 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • F01-F99 — Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) (F01-F99) [Hierarchy]
  • F70-F79 — Intellectual Disabilities [Hierarchy]

Clinical classification (CCSR)

  • MBD014 — Neurodevelopmental disorders [CCSR]

Potential MS-DRG

  • DRG 884 — ORGANIC DISTURBANCES AND INTELLECTUAL DISABILITY [MS-DRG]: “ORGANIC DISTURBANCES AND INTELLECTUAL DISABILITY (MDC 19)”

MDC crossing · procedures

  • MDC 19 — Mental Diseases and Disorders [MDC crossing]: “Mental Diseases and Disorders — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”

Index entries (22)

  • Disability, disabilities, intellectual, autosomal dominant[Index term]
  • Disability, disabilities, intellectual, autosomal recessive[Index term]
  • Disability, disabilities, intellectual, genetic related[Index term]
  • Disability, disabilities, intellectual, genetic related, specified NEC[Index term]
  • Disability, disabilities, intellectual, genetic related, with, pathogenic CHAMP1 (variant)[Index term]
  • Disability, disabilities, intellectual, genetic related, with, pathogenic HNRNPH2 (variant)[Index term]
  • Disability, disabilities, intellectual, genetic related, with, pathogenic SATB2 (variant)[Index term]
  • Disability, disabilities, intellectual, genetic related, with, pathogenic SETBP1 (variant)[Index term]
  • and 14 more

Nearest codes

  • F78 — Other intellectual disabilities [Sibling]
  • F78.A — Other genetic related intellectual disabilities [Sibling]
  • F78.A1 — SYNGAP1-related intellectual disability [Sibling]

Change history

  • FY2022 — Added to the code set [Change history]

Nearest Codes in This Family

Official ICD-10-CM classifications closest to F78.A9 in its code family, with their registry titles.

  • F78 — Other intellectual disabilities
  • F78.A — Other genetic related intellectual disabilities
  • F78.A1 — SYNGAP1-related intellectual disability

View all codes in the F78 family