Other manifestations of thiamine deficiency

This code represents thiamine deficiency presenting with symptoms other than those specifically classified as beriberi (E51.1) or Wernicke's encephalopathy (E51.2). It encompasses a range of non-specific neurological, cardiovascular, or gastrointestinal manifestations attributable to insufficient thiamine intake or absorption. These can include peripheral neuropathy, cardiac dysfunction not meeting beriberi criteria, or unexplained digestive issues linked to thiamine deficiency.

Use this code when documentation clearly indicates a diagnosis of thiamine deficiency and the patient's symptoms do not align with the specific criteria for beriberi or Wernicke's encephalopathy. This is appropriate for conditions like mild thiamine-related neuropathies, subclinical cardiac involvement, or other systemic effects where thiamine deficiency is the underlying cause. Supporting documentation should include laboratory confirmation of low thiamine levels or a strong clinical suspicion with a positive response to thiamine supplementation.

• Do not use this code if the documentation specifies beriberi (E51.1) or Wernicke's encephalopathy (E51.2); those codes are more specific.
• Ensure the medical record explicitly links the patient's "other manifestations" to thiamine deficiency, rather than simply noting low thiamine levels without associated symptoms.
• Consider sequencing this code as a secondary diagnosis if the primary reason for the encounter is a symptom (e.g., peripheral neuropathy) that is a manifestation of the thiamine deficiency.