ICD-10-CM 2027 diagnosis code
G72.3Periodic paralysis
G72.3 is a valid, billable ICD-10-CM code for periodic paralysis. 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 Adynamia, ICD-10 code for Cavare's disease.
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 G72.3
G72.3 is the ICD-10-CM diagnosis code for periodic paralysis. It belongs to category G72 (other and unspecified myopathies), block G70-G73 (diseases of myoneural junction and muscle) 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 G72 (other and unspecified myopathies), G72.3 is specifically for periodic paralysis. Related codes cover drug-induced myopathy (G72.0), alcoholic myopathy (G72.1), myopathy due to other toxic agents (G72.2), inflammatory and immune myopathies, not elsewhere classified (G72.4), other specified myopathies (G72.8) and myopathy, unspecified (G72.9).
Don't report G72.3 together with the conditions in its Excludes1 note: paramyotonia congenita (of von Eulenburg) (G71.19).
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 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous 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 359.3 (periodic paralysis).
Coding notes
- Familial periodic paralysis
- Hyperkalemic periodic paralysis (familial)
- Hypokalemic periodic paralysis (familial)
- Myotonic periodic paralysis (familial)
- Normokalemic paralysis (familial)
- Potassium sensitive periodic paralysis
- paramyotonia congenita (of von Eulenburg) (G71.19)
Notes that apply from higher levels
Instructions written at a parent level also apply to G72.3.
Broader instructions also apply from Chapter 6: Diseases of the nervous system.
Alphabetic index entries
11 entriesTerms in the official ICD-10-CM index that lead to G72.3.
- 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)
Codes whose notes reference G72.3
- E87Excludes1
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 01 · Diseases and Disorders of the Nervous System
ICD-9-CM equivalent
Converter →- 359.3Periodic paralysisexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about G72.3
Is G72.3 billable?
- Yes. G72.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G72.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G72.3 as a principal diagnosis.
Is G72.3 a CC or MCC?
- No. G72.3 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does G72.3 group to?
- G72.3 is used in the MS-DRG v44.0 logic for MS-DRG 091 (Other Disorders of Nervous System with MCC), MS-DRG 092 (Other Disorders of Nervous System with CC) and MS-DRG 093 (Other Disorders of Nervous System without CC/MCC). 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 G72.3?
- The CMS General Equivalence Mappings map G72.3 to ICD-9-CM 359.3.