2026 ICD-10-CM Diagnosis Code G72.3Periodic paralysis

ICD-10-CM Codes›G00–G99›G70-G73›G72

ICD-10-CM G72.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G72.3 is a billable ICD-10-CM diagnosis code for periodic paralysis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Myopathies.

Code Identity

ICD-10-CM Code
G72.3
Billable Status
Yes — Valid for Submission
Code Describes
Periodic paralysis
Short Description
Periodic paralysis
Same as the full description in the CMS dataset.
Parent Code
G72
Other and unspecified myopathies

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG70-G73Diseases of myoneural junction and muscle
CategoryG72Other and unspecified myopathies
This CodeG72.3Periodic paralysis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Familial hyperkalemic periodic paralysis
  • Familial hypokalemic periodic paralysis
  • Familial normokalemic periodic paralysis
  • Familial periodic paralysis
  • Periodic paralysis
  • Periodic paralysis with later-onset distal motor neuropathy
  • Periodic paralysis with transient compartment-like syndrome
  • Secondary periodic paralysis
  • Thyrotoxic periodic paralysis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Familial periodic paralysis
  • Hyperkalemic periodic paralysis (familial)
  • Hypokalemic periodic paralysis (familial)
  • Myotonic periodic paralysis (familial)
  • Normokalemic paralysis (familial)
  • Potassium sensitive periodic paralysis

Type 1 Excludes

  • paramyotonia congenita of von Eulenburg G71.19

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Adynamia(episodica) (hereditary) (periodic)
    • Cavare's disease(familial periodic paralysis)
    • Disease, diseased
      • Cavare's (familial periodic paralysis)
    • Disease, diseased
      • familial periodic paralysis
    • Disease, diseased
      • Gamstorp's (adynamia episodica hereditaria)
    • Gamstorp's disease(adynamia episodica hereditaria)
    • Paralysis, paralytic(complete) (incomplete)
      • familial (recurrent) (periodic)
    • Paralysis, paralytic(complete) (incomplete)
      • hyperkalemic periodic (familial)
    • Paralysis, paralytic(complete) (incomplete)
      • hypokalemic periodic
    • Paralysis, paralytic(complete) (incomplete)
      • normokalemic periodic
    • Paralysis, paralytic(complete) (incomplete)
      • periodic (familial) (hyperkalemic) (hypokalemic) (myotonic) (normokalemic) (potassium sensitive) (secondary)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS018
Myopathies
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Familial Periodic Paralysis

    a group of genetic neurological disorders caused by mutations in genes involved in the sodium and calcium channels in nerve cells. it is characterized by episodes of muscle paralysis in which the affected muscles become flaccid and the deep tendon reflexes disappear. between the episodes the affected muscles usually work normally.

Patient EducationClinical

Paralysis

Paralysis is the loss of muscle function in part of your body. It happens when something goes wrong with the way messages pass between your brain and muscles. Paralysis can be complete or partial. It can occur on one or both sides of your body. It can also occur in just one area, or it can be widespread.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G72.3 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
359.3 Periodic paralysis
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G72.3Overview

Is G72.3 (Other and unspecified myopathies) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report periodic paralysis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of G72.3?

Under the General Equivalence Mappings, periodic paralysis converts to ICD-9-CM 359.3 (periodic paralysis). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.