Charcot-Marie-Tooth disease with diabetes

Created Oct 2012
Reviewed Dec 2019

Query

A patient who suffers from Type 2 Diabetes Mellitus on insulin with a variety of other comorbidities has Charcot-Marie-Tooth (CMT) type I disease.  There is no ‘diabetes with’ look up under Charcot-Marie-Tooth specifically, however as this is a neuropathic condition, we wondered if it should be coded out as:

E11.42  Type 2 diabetes mellitus with diabetic polyneuropathy
G60.0   Hereditary motor and sensory neuropathy

The Charcot-Marie-Tooth Disease article on the Medscape website was used as a first line investigation and this might be helpful.

Response

Charcot-Marie-Tooth (CMT) disease is a hereditary neurological disorder which affects both motor and sensory nerves.  CMT is divided into types I-IV.  Type I affects the myelin sheath (the protective covering of the nerve) and type II affects the nerve fibers (axons).

Following the classification principles in ACS 0401 Diabetes Mellitus and Intermediate Hyperglycaemia and the ICD-10-AM Alphabetic Index for ‘Diabetes, diabetic’ assign E11.42 Type 2 diabetes mellitus with diabetic polyneuropathy.  Refer to ACS 0401 Rule 4b to determine if the additional diagnosis of G60.0 Hereditary motor and sensory neuropathy is assigned.

Diabetes, diabetic (controlled) (mellitus)
- with
....
- - neuropathy
....
- - - polyneuropathy E1-.42
....
- - - - sensorimotor E1-.42

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