DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

E51 Thiamine deficiency

  • Header · not billable

E51 is not billable. The category heads 5 billable codes in FY2027, grouped under 4 subdivisions.

Index → code

Where it sits

  1. Chapter 4 Endocrine, nutritional and metabolic diseases (E00-E89)
  2. E50-E64 Other nutritional deficiencies (E50-E64)
  3. E51 Thiamine deficiency
Billable codes
5
Subdivisions
4
CC / MCC codes
5 / 0
HCC V28 codes
0
New FY2027
0
Index entries
47

Codes in E51

  1. E51.1
    Beriberi
    Header
  2. E51.11
    Dry beriberi
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Beriberi NOS
    • Beriberi with polyneuropathy
  3. E51.12
    Wet beriberi
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Beriberi with cardiovascular manifestations
    • Cardiovascular beriberi
    • Shoshin disease
  4. E51.2
    Wernicke's encephalopathy
    BillableCC
  5. E51.8
    Other manifestations of thiamine deficiency
    BillableCC
  6. E51.9
    Thiamine deficiency, unspecified
    BillableCC

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At E51

Excludes1

  • sequelae of thiamine deficiency (E64.8) E64.8

Notes that also apply

Block E50-E64 instructions (Excludes2 1): printed on the block page.

Chapter 4 instructions (Notes 1, Excludes1 1): printed on the chapter 4 page.

Index entries

  • Beriberi (dry) → E51.11
  • Kakke → E51.11
  • Panneuritis endemica → E51.11
  • Shoshin (acute fulminating beriberi) → E51.11
  • Thiaminic deficiency with beriberi → E51.11
  • Polioencephalopathy, superior hemorrhagic → E51.2
  • Aneurin deficiency → E51.9
  • Thiamin deficiency → E51.9
  • Beriberi (dry)polyneuropathy → E51.11
  • Neuritis (rheumatoid)endemic → E51.11
  • Neuritis (rheumatoid)multiplex endemica → E51.11
  • Polyneuritis, polyneuriticendemic → E51.11
  • Beriberi (dry)heart (disease) → E51.12
  • Beriberi (dry)wet → E51.12
  • Cardiomyopathy (familial) (idiopathic)beriberi → E51.12
  • Encephalopathy (acute)Wernicke's → E51.2
  • Hemorrhage, hemorrhagic (concealed)polioencephalitis, superior → E51.2
  • Polioencephalitis (acute) (bulbar)superior hemorrhagic (acute) (Wernicke's) → E51.2
  • Polioencephalitis (acute) (bulbar)Wernicke's → E51.2
  • Polioencephalomyelitis (acute) (anterior)with beriberi → E51.2
  • Wernicke'sdisease or syndrome → E51.2
  • Wernicke'sencephalopathy → E51.2
  • Wernicke'spolioencephalitis, superior → E51.2
  • Thiamin deficiencyspecified NEC → E51.8
  • Deficiency, deficientaneurin → E51.9
  • Deficiency, deficientthiamin, thiaminic (chloride) → E51.9
  • Beriberi (dry)wetinvolving circulatory system → E51.11
  • Deficiency, deficientthiamin, thiaminic (chloride)beriberi (dry) → E51.11
  • Neuritis (rheumatoid)due toberiberi → E51.11
  • Neuritis (rheumatoid)multipleendemic → E51.11
  • Polioencephalopathy, superior hemorrhagicwithberiberi → E51.11
  • Polyneuropathy (peripheral)in (due to)beriberi → E51.11
  • Cardiomyopathy (familial) (idiopathic)due toberiberi → E51.12
  • Cardiomyopathy (familial) (idiopathic)nutritionalberiberi → E51.12
  • Disease, diseasedheart (organic)beriberi (wet) → E51.12
  • Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic)in (due to)beriberi → E51.12
  • Encephalopathy (acute)vitamin B deficiency NECvitamin B1 → E51.2
  • Deficiency, deficientvitamin (multiple) NOSB1 NOS → E51.9
  • Deficiency, deficientvitamin (multiple) NOSthiamin → E51.9
  • Avitaminosis (multiple)Bwithberiberi → E51.11

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