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ICD-10-CM 2027 diagnosis code

G47.32High altitude periodic breathing

✓ Billable / specific

G47.32 is a valid, billable ICD-10-CM code for high altitude periodic breathing. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 G47.32

G47.32 is the ICD-10-CM diagnosis code for high altitude periodic breathing. 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 G47.3 (sleep apnea), G47.32 is specifically for high altitude periodic breathing. Related codes cover unspecified (G47.30), primary central sleep apnea (G47.31), obstructive sleep apnea (adult) (pediatric) (G47.33), idiopathic sleep related nonobstructive alveolar hypoventilation (G47.34), congenital central alveolar hypoventilation syndrome (G47.35), sleep related hypoventilation in conditions classified elsewhere (G47.36), central sleep apnea in conditions classified elsewhere (G47.37) and other sleep apnea (G47.39).

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 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC, relative weight 5.6154), DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC, relative weight 4.381), DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC, relative weight 2.7307) and DRG 204 (Respiratory Signs and Symptoms, relative weight 0.821), in Pre-MDC and MDC 04 (Diseases and Disorders of the Respiratory System), 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 327.22 (high altitude periodic breathing).

Notes that apply from higher levels

Instructions written at a parent level also apply to G47.32.

› From G47.3 Sleep apnea
Excludes1
Code also
  • any associated underlying condition
› 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

1 entries

Terms in the official ICD-10-CM index that lead to G47.32.

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 04 · Diseases and Disorders of the Respiratory System

ICD-9-CM equivalent

Converter →
  • 327.22High altitude periodic breathingexact

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 G47.32

Is G47.32 billable?

Yes. G47.32 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G47.32 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G47.32 as a principal diagnosis.

Is G47.32 a CC or MCC?

No. G47.32 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does G47.32 group to?

G47.32 is used in the MS-DRG v44.0 logic for MS-DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC), MS-DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC), MS-DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC) and MS-DRG 204 (Respiratory Signs and Symptoms). 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 G47.32?

The CMS General Equivalence Mappings map G47.32 to ICD-9-CM 327.22.