ICD-10-CM 2027
ICD-10 code for congenita amyotonia
From the official ICD-10-CM alphabetic index entry “Amyotonia › congenita”. Page updated September 29, 2026.
About coding congenita amyotonia
The ICD-10-CM code for congenita amyotonia is G70.2 (Congenital and developmental myasthenia).
Within G70 (myasthenia gravis and other myoneural disorders), G70.2 is specifically for congenital and developmental myasthenia. Related codes cover myasthenia gravis (G70.0), toxic myoneural disorders (G70.1), other specified myoneural disorders (G70.8) and myoneural disorder, unspecified (G70.9).
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 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), 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.
Common questions about congenita amyotonia ICD-10 codes
What is the ICD-10 code for congenita amyotonia?
- G70.2 — Congenital and developmental myasthenia.
Is G70.2 billable?
- Yes. G70.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G70.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G70.2 as a principal diagnosis.
Is G70.2 a CC or MCC?
- No. G70.2 is neither a CC nor an MCC under MS-DRG v44.0.