F78.A1 — SYNGAP1-related intellectual disability
Is F78.A1 billable?
Yes — F78.A1 is billable for FY2027. F78.A1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. F78.A1 may be submitted for encounters from October 1, 2026 through September 30, 2027.
F78.A1 at a glance
| Code | F78.A1 |
|---|---|
| Description | SYNGAP1-related intellectual disability |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F78.A1 group to?
F78.A1 sits in MDC 19 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 884Organic Disturbances and Intellectual Disabilitymedical
How is F78.A1 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F78.A1. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Disability, disabilities › intellectual › SYNGAP1-related
- Disability, disabilities › intellectual › with › pathogenic SYNGAP1
- Disability, disabilities › intellectual › genetic related › SYNGAP1-related
- Disability, disabilities › intellectual › genetic related › with › pathogenic SYNGAP1
Code also
Two codes may be needed to describe the condition fully. Whether F78.A1 is sequenced first depends on the reason for the encounter.
Excludes1 — never code together — inherited from F70-F79
The conditions below can never be reported together with F78.A1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- borderline intellectual functioning, IQ above 70 to 84 (R41.83)
Code first — inherited from F70-F79
The underlying condition below must be sequenced before F78.A1. F78.A1 describes a manifestation and cannot be the principal or first-listed diagnosis.
- any associated physical or developmental disorders
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F78.A1, but a patient may have both at the same time. When documentation supports it, F78.A1 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
How long has F78.A1 existed?
F78.A1 first appears in FY2022.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.