Endocrine, Nutritional and Metabolic Diseases

ICD-10 Code: E11.40

Type 2 Diabetes Mellitus with Diabetic Neuropathy, Unspecified

Type 2 diabetes mellitus with diabetic neuropathy represents nerve damage caused by prolonged hyperglycemia affecting peripheral, autonomic, or focal nerve function, with the specific type of neuropathy not specified or documented.

Clinical Information

Diabetic neuropathy is one of the most common chronic complications of diabetes, affecting up to 50% of patients with longstanding disease. The pathophysiology involves multiple metabolic pathways including polyol pathway activation, oxidative stress, and microvascular damage leading to nerve ischemia and demyelination. The most common form is distal symmetric polyneuropathy (DSPN), presenting as bilateral glove-and-stocking distribution of numbness, paresthesias, and pain in the feet and hands. Patients may describe burning, tingling, sharp/shooting pain, or complete numbness. Symptoms typically worsen at night and can significantly impact quality of life. Other forms include autonomic neuropathy (affecting cardiovascular, gastrointestinal, and genitourinary systems), focal/multifocal neuropathies (cranial nerve palsies, radiculoplexus neuropathy), and proximal neuropathy (diabetic amyotrophy). Complications include foot ulcers, Charcot arthropathy, falls due to loss of proprioception, and cardiovascular autonomic dysfunction.

Coding Guidelines

  • 1Use E11.40 when diabetic neuropathy is documented but the specific type is not specified
  • 2For specific types of neuropathy, use more specific codes: E11.41 (mononeuropathy), E11.42 (polyneuropathy), E11.43 (autonomic neuropathy), E11.44 (amyotrophy), E11.49 (other)
  • 3Do not code E11.40 if a more specific neuropathy code applies based on documentation
  • 4Symptoms such as 'numbness,' 'tingling,' 'burning feet' alone do not establish diabetic neuropathy diagnosis - provider must document causality
  • 5If both neuropathy and related conditions exist (foot ulcer, Charcot foot), code the most specific complication
  • 6Do not separately code symptoms that are integral to neuropathy (paresthesia, hyperesthesia) unless they require separate treatment

Common Uses

  • Office visit for diabetic patient complaining of foot pain and numbness, physician documents 'diabetic neuropathy'
  • Referral to podiatry for diabetic neuropathy without specification of type
  • Prescription of gabapentin or pregabalin for 'painful diabetic neuropathy'
  • Annual diabetic foot exam revealing sensory loss, documented as diabetic neuropathy
  • Inpatient consultation for 'diabetic peripheral neuropathy' during hospitalization
  • Initial diagnosis of neuropathy pending further nerve conduction studies

Related ICD-10 Codes

E11.42Type 2 diabetes with diabetic polyneuropathy (use when specified)
E11.41Type 2 diabetes with diabetic mononeuropathy
E11.43Type 2 diabetes with diabetic autonomic (poly)neuropathy
E11.44Type 2 diabetes with diabetic amyotrophy
E11.9Type 2 diabetes without complications
G63Polyneuropathy in diseases classified elsewhere (do not code separately)

Documentation Requirements

  • Provider must document causal relationship: 'diabetic neuropathy,' 'neuropathy due to diabetes,' or 'diabetes with neuropathy'
  • Document neurological examination findings: sensory testing (monofilament, vibration, pinprick), motor examination, reflexes
  • Describe symptoms: location (feet, hands), quality (burning, tingling, numbness, pain), duration, severity
  • Document impact on function and activities of daily living
  • Specify type of neuropathy if known (peripheral, autonomic, focal) to allow more specific coding
  • Current treatment plan (medications for neuropathic pain, foot care education, physical therapy)

Real-World Coding Examples

62-year-old with 12-year history of type 2 diabetes presents with bilateral foot burning and numbness for 6 months. Monofilament testing shows decreased sensation. Physician documents: 'diabetic neuropathy.' Diagnosis: Type 2 diabetes mellitus with diabetic neuropathy, unspecified (E11.40). Prescribed gabapentin.

Patient admitted for pneumonia. History includes type 2 diabetes with known neuropathy per previous records. Problem list updated with 'Type 2 DM with neuropathy.' Code: E11.40 as secondary diagnosis.

Endocrinology consultation documents: '15-year history of diabetes now with sensory neuropathy in feet.' Started on duloxetine for painful diabetic neuropathy. Diagnosis: E11.40.

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Medical coding for Endocrine, Nutritional and Metabolic Diseases