---
title: "ICD-10-CM F51.12: Insufficient sleep syndrome | BillingBrief"
description: "F51.12 is insufficient sleep syndrome, filed under hypersomnia not due to a substance or known physiological condition. If the record documents sleep…"
canonical: "https://billingbrief.com/icd10/f51.12/"
language: "en"
---

# F51.12 Insufficient sleep syndrome

ICD-10-CM · [CMS code reference](#source)

F51.12 is insufficient sleep syndrome, filed under hypersomnia not due to a substance or known physiological condition. If the record documents sleep deprivation instead, use Z72.820.

## What to know

-   Excludes1: F51.12 and Z72.820 (sleep deprivation) are not reported together. Choose the one the documentation supports.

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   sleep deprivation ([Z72.820](https://billingbrief.com/icd10/z72.820/))

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   alcohol related hypersomnia ([F10.182](https://billingbrief.com/icd10/f10.182/), [F10.282](https://billingbrief.com/icd10/f10.282/), [F10.982](https://billingbrief.com/icd10/f10.982/))
-   drug-related hypersomnia ([F11.182](https://billingbrief.com/icd10/f11.182/), [F11.282](https://billingbrief.com/icd10/f11.282/), [F11.982](https://billingbrief.com/icd10/f11.982/), F13.182, F13.282, F13.982, F14.182, F14.282, F14.982, F15.182, F15.282, F15.982, F19.182, F19.282, F19.982)
-   hypersomnia NOS ([G47.10](https://billingbrief.com/icd10/g47.10/))
-   hypersomnia due to known physiological condition ([G47.10](https://billingbrief.com/icd10/g47.10/))
-   idiopathic hypersomnia ([G47.11](https://billingbrief.com/icd10/g47.11/), [G47.12](https://billingbrief.com/icd10/g47.12/))
-   narcolepsy (G47.4-)
-   organic sleep disorders (G47.-)

## Related codes

-   [`F51.04` Psychophysiologic insomnia ICD-10-CM](https://billingbrief.com/icd10/f51.04/)
-   [`F51.05` Insomnia due to other mental disorder ICD-10-CM](https://billingbrief.com/icd10/f51.05/)
-   [`F51.09` Other insomnia not due to a substance or known physiological condition ICD-10-CM](https://billingbrief.com/icd10/f51.09/)
-   [`F51.11` Primary hypersomnia ICD-10-CM](https://billingbrief.com/icd10/f51.11/)
-   [`F51.13` Hypersomnia due to other mental disorder ICD-10-CM](https://billingbrief.com/icd10/f51.13/)
-   [`F51.19` Other hypersomnia not due to a substance or known physiological condition ICD-10-CM](https://billingbrief.com/icd10/f51.19/)
-   [`F51.3` Sleepwalking \[somnambulism\] ICD-10-CM](https://billingbrief.com/icd10/f51.3/)
-   [`F51.4` Sleep terrors \[night terrors\] ICD-10-CM](https://billingbrief.com/icd10/f51.4/)

## Common questions

### Is F51.12 a billable code?

Yes. F51.12 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

F51 Sleep disorders not due to a substance or known physiological condition

Chapter

Mental, behavioral and neurodevelopmental disorders

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).