ICD-10-CM 2027
ICD-10 code for Gamstorp's disease
From the official ICD-10-CM alphabetic index entry “Disease, diseased › Gamstorp's (adynamia episodica hereditaria)”. Page updated September 29, 2026.
About coding Gamstorp's disease
The ICD-10-CM code for Gamstorp's disease is G72.3 (Periodic paralysis).
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.
Don't confuse with (Excludes1 for G72.3)
- paramyotonia congenita (of von Eulenburg) (G71.19)
Common questions about Gamstorp's disease ICD-10 codes
What is the ICD-10 code for Gamstorp's disease?
- G72.3 — Periodic paralysis.
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.