ICD-10-CM 2027
ICD-10 code for muscle weak
From the official ICD-10-CM alphabetic index entry “Weak, weakening, weakness (generalized) › muscle”. Page updated September 29, 2026.
About coding muscle weak
The ICD-10-CM code for muscle weak is M62.81 (Muscle weakness (generalized)).
Within M62.8 (other specified disorders of muscle), M62.81 is specifically for muscle weakness (generalized). Related codes cover Rhabdomyolysis (M62.82), muscle spasm (M62.83), Sarcopenia (M62.84), dysfunction of the multifidus muscles, lumbar region (M62.85) and other specified disorders of muscle (M62.89).
Don't report M62.81 together with the conditions in its Excludes1 note: muscle weakness in sarcopenia (M62.84).
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 M62.81)
- muscle weakness in sarcopenia (M62.84)
Common questions about muscle weak ICD-10 codes
What is the ICD-10 code for muscle weak?
- M62.81 — Muscle weakness (generalized).
Is M62.81 billable?
- Yes. M62.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M62.81 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M62.81 as a principal diagnosis.
Is M62.81 a CC or MCC?
- No. M62.81 is neither a CC nor an MCC under MS-DRG v44.0.