D neither a nor b is right
<span>The answer is M62.81. It is
a billable ICD code used to specify a diagnosis of muscle weakness
(generalized). A 'billable code' is detailed enough to be used to specify a
medical diagnosis. The ICD code M628 is used to code Muscle weakness. Muscle
weakness or myasthenia is a lack of muscle strength. The reasons are various
and can be divided into conditions that have either true or perceived muscle
weakness.</span>
You should stretch before you exercise
