Skip to content
Dx

ICD-10-CM 2027 diagnosis code

G47.13Recurrent hypersomnia

✓ Billable / specific

G47.13 is a valid, billable ICD-10-CM code for recurrent hypersomnia. 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 Klein-Levin syndrome.

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 G47.13

G47.13 is the ICD-10-CM diagnosis code for recurrent hypersomnia. It belongs to category G47 (sleep disorders), block G40-G47 (episodic and paroxysmal disorders) and chapter 6 (diseases of the nervous system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within G47.1 (hypersomnia), G47.13 is specifically for recurrent hypersomnia. Related codes cover unspecified (G47.10), idiopathic hypersomnia with long sleep time (G47.11), idiopathic hypersomnia without long sleep time (G47.12), due to medical condition (G47.14) and other hypersomnia (G47.19).

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 887 (Other Mental Disorder Diagnoses, relative weight 1.1139), 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 327.13 (recurrent hypersomnia).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Kleine-Levin syndrome
  • Menstrual related hypersomnia

Notes that apply from higher levels

Instructions written at a parent level also apply to G47.13.

› From G47.1 Hypersomnia
Excludes2
› From G47 Sleep disorders
Excludes2
  • nightmares (F51.5)
  • nonorganic sleep disorders (F51.-)
  • sleep terrors (F51.4)
  • sleepwalking (F51.3)

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to G47.13.

Codes whose notes reference G47.13

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.

MDC 19 · Mental Diseases and Disorders

ICD-9-CM equivalent

Converter →
  • 327.13Recurrent hypersomniaexact

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 G47.13

Is G47.13 billable?

Yes. G47.13 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G47.13 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G47.13 as a principal diagnosis.

Is G47.13 a CC or MCC?

No. G47.13 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does G47.13 group to?

G47.13 is used in the MS-DRG v44.0 logic for MS-DRG 887 (Other Mental Disorder Diagnoses). 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 G47.13?

The CMS General Equivalence Mappings map G47.13 to ICD-9-CM 327.13.