DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

E79 Disorders of purine and pyrimidine metabolism

  • Header · not billable

E79 is not billable. The category heads 7 billable codes in FY2027, grouped under 5 subdivisions.

Index → code

  • Lithemia → E79.0
  • Lesch-Nyhan syndrome → E79.1
  • Uricemia (asymptomatic) → E79.0

Where it sits

  1. Chapter 4 Endocrine, nutritional and metabolic diseases (E00-E89)
  2. E70-E88 Metabolic disorders (E70-E88)
  3. E79 Disorders of purine and pyrimidine metabolism
Billable codes
7
Subdivisions
5
CC / MCC codes
6 / 0
HCC V28 codes
1
New FY2027
0
Index entries
21

Codes in E79

  1. E79.0
    Hyperuricemia without signs of inflammatory arthritis and tophaceous disease
    Billable
    Inclusion terms 1

    Inclusion terms

    • Asymptomatic hyperuricemia
  2. E79.1
    Lesch-Nyhan syndrome
    BillableCC50
    Inclusion terms 1

    Inclusion terms

    • HGPRT deficiency
  3. E79.2
    Myoadenylate deaminase deficiency
    BillableCC
  4. E79.8
    Other disorders of purine and pyrimidine metabolism
    Header
  5. E79.81
    Aicardi-Goutières syndrome
    BillableCC
  6. E79.82
    Hereditary xanthinuria
    BillableCC
  7. E79.89
    Other specified disorders of purine and pyrimidine metabolism
    BillableCC
  8. E79.9
    Disorder of purine and pyrimidine metabolism, 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 E79

Excludes1

  • Ataxia-telangiectasia (Q87.19) Q87.19
  • Bloom's syndrome (Q82.8) Q82.8
  • Cockayne's syndrome (Q87.19) Q87.19
  • calculus of kidney (N20.0) N20.0
  • combined immunodeficiency disorders (D81.-) D81
  • Fanconi's anemia (D61.09) D61.09
  • gout (M1A.-, M10.-) M1A M10
  • orotaciduric anemia (D53.0) D53.0
  • progeria (E34.8) E34.8
  • Werner's syndrome (E34.8) E34.8
  • xeroderma pigmentosum (Q82.1) Q82.1

Notes that also apply

Block E70-E88 instructions (Excludes1 5, Excludes2 1): printed on the block page.

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

Index entries

  • Hyperuricemia (asymptomatic) → E79.0
  • Lithemia → E79.0
  • Uric acid in blood (increased) → E79.0
  • Uricacidemia (asymptomatic) → E79.0
  • Uricemia (asymptomatic) → E79.0
  • Lesch-Nyhan syndrome → E79.1
  • Xanthinuria, hereditary → E79.82
  • Orotaciduria, oroticaciduria (congenital) (hereditary) (pyrimidine deficiency) → E79.89
  • Deficiency, deficienthypoxanthine- (guanine)-phosphoribosyltransferase (HG- PRT) (total H-PRT) → E79.1
  • Deficiency, deficientmyoadenylate deaminase → E79.2
  • SyndromeAicardi-Goutières → E79.81
  • Calculus, calculi, calculousxanthine → E79.82 [N22]
  • Stone(s)xanthine → E79.82 [N22]
  • Aciduriaorotic (congenital) (hereditary) (pyrimidine deficiency) → E79.89
  • Disorder (of)purine metabolism → E79.9
  • Disorder (of)pyrimidine metabolism → E79.9
  • Disorder (of)metabolism NOSpurine → E79.9
  • Disorder (of)metabolism NOSpyrimidine → E79.9
  • Arthropathygoutyin (due to)Lesch-Nyhan syndrome → E79.1 [M14.8-]
  • Disorder (of)metabolism NOSpurinespecified NEC → E79.89
  • Disorder (of)metabolism NOSpyrimidinespecified NEC → E79.89

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

Hierarchy