2027 ICD-10-CM Diagnosis Code G72.3Periodic paralysis
ICD-10-CM Codes›G00–G99›G70-G73›G72
- Billable — Valid for Submission
- Chronic Condition
G72.3 is a billable ICD-10-CM diagnosis code for periodic paralysis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. Coders also document this condition as familial hyperkalemic periodic paralysis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Myopathies.
G72.3 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the ESRD (V21) category 75 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
G72.3 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G72.3: its own notes plus those printed at G72 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Familial periodic paralysis
- Hyperkalemic periodic paralysis (familial)
- Hypokalemic periodic paralysis (familial)
- Myotonic periodic paralysis (familial)
- Normokalemic paralysis (familial)
- Potassium sensitive periodic paralysis
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- paramyotonia congenita (of von Eulenburg) (G71.19)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name G72.3, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming G72.3: they are not reported together with it, unless the two conditions are unrelated.
- E87 Other disorders of fluid, electrolyte and acid-base balancefamilial periodic paralysis (G72.3)
Excludes2 1
These codes carry an Excludes2 note naming G72.3: its condition is not part of those codes, and both may be reported when the patient has both.
- Block M60-M63 Disorders of muscles
Code First 1
These codes say to code first a condition named in the note, and G72.3 is one of the conditions named.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Paralysis, Hyperkalemic Periodic
an autosomal dominant familial disorder which presents in infancy or childhood and is characterized by episodes of weakness associated with hyperkalemia. during attacks, muscles of the lower extremities are initially affected, followed by the lower trunk and arms. episodes last from 15-60 minutes and typically occur after a period of rest following exercise. a defect in skeletal muscle sodium channels has been identified as the cause of this condition. normokalemic periodic paralysis is a closely related disorder marked by a lack of alterations in potassium levels during attacks of weakness. (adams et al., principles of neurology, 6th ed, p1481)
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.
Code HistoryHistory
Questions About G72.3Overview
What is the ICD-10 code for periodic paralysis?
The ICD-10-CM code for periodic paralysis is G72.3 (sometimes written as G723). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
What MS-DRG does G72.3 group to?
When periodic paralysis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.
Can G72.3 be reported with G71.19?
Not as a rule. The Excludes1 note on G72.3 lists "paramyotonia congenita (of von Eulenburg) (G71.19)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
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.
Does G72.3 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: G72.3 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the ESRD (V21) category 75 (Polyneuropathy).
