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G72.3

G72.3Periodic paralysis

Billable / specific codeICD-10-CM

G72.3 is a billable, specific ICD-10-CM code for periodic paralysis. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • paramyotonia congenita (of von Eulenburg) (G71.19)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

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

Other codes that can never be billed with G72.3

These codes carry an Excludes1 note pointing at G72.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G72.3 alone.

  • E87Other disorders of fluid, electrolyte and acid-base balance

Risk adjustment

G72.3 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

G72.3 is named in 12 Medicare coverage policies 12 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A53052Billing and Coding: Home Health Speech-Language Pathology
  • A54095Billing and Coding: Nerve Conduction Studies and Electromyography
  • A54095Billing and Coding: Nerve Conduction Studies and Electromyography
  • A54969Billing and Coding: Nerve Conduction Studies and Electromyography

How G72.3 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G72.3.

  • Adynamia(episodica) (hereditary) (periodic)
  • Cavare's disease(familial periodic paralysis)
  • Gamstorp's disease(adynamia episodica hereditaria)
  • Disease, diseasedCavare's(familial periodic paralysis)
  • Disease, diseasedfamilial periodic paralysis
  • Disease, diseasedGamstorp's(adynamia episodica hereditaria)
  • Paralysis, paralyticfamilial(recurrent) (periodic)
  • Paralysis, paralytichyperkalemic periodic(familial)
  • Paralysis, paralytichypokalemic periodic
  • Paralysis, paralyticnormokalemic periodic
  • Paralysis, paralyticperiodic(familial) (hyperkalemic) (hypokalemic) (myotonic) (normokalemic) (potassium sensitive) (secondary)

Related codes at this level

Codes that share G72. If G72.3 is not quite right, the correct code is usually one of these.

Questions about G72.3

Is G72.3 a billable ICD-10-CM code?
Yes. G72.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G72.3 sit in the tabular list?
Diseases of the nervous system (G00-G99), in the block Diseases of myoneural junction and muscle (G70-G73).
What cannot be coded together with G72.3?
G72.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.