DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

E20 Hypoparathyroidism

  • Header · not billable

E20 is not billable. The category heads 9 billable codes in FY2027, grouped under 4 subdivisions.

Index → code

  • Hypoparathyroidism → E20.9
  • Parathyroid tetany → E20.9
  • Pseudohypoparathyroidism → E20.1

Where it sits

  1. Chapter 4 Endocrine, nutritional and metabolic diseases (E00-E89)
  2. E20-E35 Disorders of other endocrine glands (E20-E35)
  3. E20 Hypoparathyroidism
Billable codes
9
Subdivisions
4
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
20

Codes in E20

  1. E20.0
    Idiopathic hypoparathyroidism
    Billable
  2. E20.1
    Pseudohypoparathyroidism
    Billable
  3. E20.8
    Other hypoparathyroidism
    Header
  4. E20.81
    Hypoparathyroidism due to impaired parathyroid hormone secretion
    Header
  5. E20.810
    Autosomal dominant hypocalcemia
    Billable
    Inclusion terms 2, Code also 5

    Inclusion terms

    • Autosomal dominant hypocalcemia type 1 (ADH1)
    • Autosomal dominant hypocalcemia type 2 (ADH2)

    Code also

    • , if applicable, any associated conditions, such as:
    • calculus of kidney (N20.0) N20.0
    • chronic kidney disease (N18.-) N18
    • respiratory distress (J80, R06.-) J80 R06
    • seizure disorder (G40.-, R56.9) G40 R56.9
  6. E20.811
    Secondary hypoparathyroidism in diseases classified elsewhere
    Billable
    Code first 1

    Code first

    • underlying condition, if known
  7. E20.812
    Autoimmune hypoparathyroidism
    Billable
    Code first 3

    Code first

    • , if applicable, underlying condition such as:
    • autoimmune polyglandular failure (E31.0) E31.0
    • Schmidt's syndrome (E31.0) E31.0
  8. E20.818
    Other specified hypoparathyroidism due to impaired parathyroid hormone secretion
    Billable
    Inclusion terms 1

    Inclusion terms

    • Familial isolated hypoparathyroidism
  9. E20.819
    Hypoparathyroidism due to impaired parathyroid hormone secretion, unspecified
    Billable
  10. E20.89
    Other specified hypoparathyroidism
    Billable
    Inclusion terms 1

    Inclusion terms

    • Familial hypoparathyroidism
  11. E20.9
    Hypoparathyroidism, unspecified
    Billable
    Inclusion terms 1

    Inclusion terms

    • Parathyroid tetany

Sources of each column.

Instructions

At E20

Excludes1

  • Di George's syndrome (D82.1) D82.1
  • postprocedural hypoparathyroidism (E89.2) E89.2
  • tetany NOS (R29.0) R29.0
  • transitory neonatal hypoparathyroidism (P71.4) P71.4

Notes that also apply

Block E20-E35 instructions (Excludes1 2): printed on the block page.

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

Index entries

  • Pseudohypoparathyroidism → E20.1
  • Pseudopseudohypoparathyroidism → E20.1
  • Hypoparathyroidism → E20.9
  • Parathyroid tetany → E20.9
  • Hypoparathyroidismidiopathic → E20.0
  • Hypocalcemiaautosomal dominant → E20.810
  • Hypoparathyroidismsecondary, in diseases classified elsewhere → E20.811
  • Hypoparathyroidismautoimmune → E20.812
  • Hypoparathyroidismdue to impaired parathyroid hormone secretion, unspecified → E20.819
  • Hypoparathyroidismfamilial → E20.89
  • Hypoparathyroidismspecified NEC → E20.89
  • Deficiency, deficientparathyroid (gland) → E20.9
  • Insufficiency, insufficientparathyroid (gland) → E20.9
  • Tetany (due to)parathyroid (gland) → E20.9
  • Hypocalcemiaautosomal dominanttype 1 (ADH1) → E20.810
  • Hypocalcemiaautosomal dominanttype 2 (ADH2) → E20.810
  • Hypoparathyroidismfamilialisolated → E20.818
  • Hypoparathyroidismspecified NECdue to impaired parathyroid hormone secretion → E20.818
  • Cataract (cortical) (immature) (incipient)in (due to)hypoparathyroidism → E20.9 [H28]
  • Myopathyin (due to)hypoparathyroidism → E20.9 [G73.7]

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy