DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

E70 Disorders of aromatic amino-acid metabolism

  • Header · not billable

E70 is not billable. The category heads 26 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

Where it sits

  1. Chapter 4 Endocrine, nutritional and metabolic diseases (E00-E89)
  2. E70-E88 Metabolic disorders (E70-E88)
  3. E70 Disorders of aromatic amino-acid metabolism
Billable codes
26
Subdivisions
8
CC / MCC codes
26 / 0
HCC V28 codes
0
New FY2027
0
Index entries
73

Codes in E70

  1. E70.0
    Classical phenylketonuria
    BillableCC
  2. E70.1
    Other hyperphenylalaninemias
    BillableCC
  3. E70.2
    Disorders of tyrosine metabolism
    Header
    Excludes1 1

    Excludes1

    • transitory tyrosinemia of newborn (P74.5) P74.5
  4. E70.20
    Disorder of tyrosine metabolism, unspecified
    BillableCC
  5. E70.21
    Tyrosinemia
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Hypertyrosinemia
  6. E70.29
    Other disorders of tyrosine metabolism
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Alkaptonuria
    • Ochronosis
  7. E70.3
    Albinism
    Header
  8. E70.30
    Albinism, unspecified
    BillableCC
  9. E70.31
    Ocular albinism
    Header
  10. E70.310
    X-linked ocular albinism
    BillableCC
  11. E70.311
    Autosomal recessive ocular albinism
    BillableCC
  12. E70.318
    Other ocular albinism
    BillableCC
  13. E70.319
    Ocular albinism, unspecified
    BillableCC
  14. E70.32
    Oculocutaneous albinism
    Header
    Excludes1 2

    Excludes1

    • Chediak-Higashi syndrome (E70.330) E70.330
    • Hermansky-Pudlak syndrome (E70.331) E70.331
  15. E70.320
    Tyrosinase negative oculocutaneous albinism
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Albinism I
    • Oculocutaneous albinism ty-neg
  16. E70.321
    Tyrosinase positive oculocutaneous albinism
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Albinism II
    • Oculocutaneous albinism ty-pos
  17. E70.328
    Other oculocutaneous albinism
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Cross syndrome
  18. E70.329
    Oculocutaneous albinism, unspecified
    BillableCC
  19. E70.33
    Albinism with hematologic abnormality
    Header
  20. E70.330
    Chediak-Higashi syndrome
    BillableCC
  21. E70.331
    Hermansky-Pudlak syndrome
    BillableCC
  22. E70.338
    Other albinism with hematologic abnormality
    BillableCC
  23. E70.339
    Albinism with hematologic abnormality, unspecified
    BillableCC
  24. E70.39
    Other specified albinism
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Piebaldism
  25. E70.4
    Disorders of histidine metabolism
    Header
  26. E70.40
    Disorders of histidine metabolism, unspecified
    BillableCC
  27. E70.41
    Histidinemia
    BillableCC
  28. E70.49
    Other disorders of histidine metabolism
    BillableCC
  29. E70.5
    Disorders of tryptophan metabolism
    BillableCC
  30. E70.8
    Other disorders of aromatic amino-acid metabolism
    Header
  31. E70.81
    Aromatic L-amino acid decarboxylase deficiency
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • AADC deficiency
  32. E70.89
    Other disorders of aromatic amino-acid metabolism
    BillableCC
  33. E70.9
    Disorder of aromatic amino-acid 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

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

  • Følling's disease → E70.0
  • Hyperphenylalaninemia NEC → E70.1
  • Phenylketonuria → E70.1
  • Hypertyrosinemia → E70.21
  • Tyrosinemia → E70.21
  • Tyrosinosis → E70.21
  • Alcaptonuria → E70.29
  • Alkaptonuria → E70.29
  • Homogentisate 1,2-dioxygenase deficiency → E70.29
  • Ochronosis (endogenous) → E70.29
  • Tyrosinuria → E70.29
  • Albinism, albino → E70.30
  • Albinismus → E70.30
  • Cross syndrome → E70.328
  • Chédiak-Higashi (-Steinbrinck) syndrome (congenital gigantism of peroxidase granules) → E70.330
  • Hermansky-Pudlak syndrome → E70.331
  • Piebaldism → E70.39
  • Histidinemia, histidinuria → E70.41
  • Hyperhistidinemia → E70.41
  • Hydroxykynureninuria → E70.89
  • Aromatic amino-acid metabolism disorder → E70.9
  • Oligophreniaphenylpyruvic → E70.0
  • Phenylketonuriaclassical → E70.0
  • Deficiency, deficientphenylalanine hydroxylase → E70.1
  • Phenylketonuriamaternal → E70.1
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)ochronotic → E70.29
  • Deficiency, deficienthomogentisate 1,2-dioxygenase → E70.29
  • Osteoarthrosis (degenerative) (hypertrophic) (joint)deformans alkaptonurica → E70.29 [M36.8]
  • Albinism, albinoocular → E70.319
  • Albinism, albinoI → E70.320
  • Albinism, albinoII → E70.321
  • Albinism, albinooculocutaneous → E70.329
  • Anomaly, anomalous (congenital) (unspecified type)Chédiak-Higashi (-Steinbrinck) (congenital gigantism of peroxidase granules) → E70.330
  • Disease, diseasedChédiak-Steinbrinck (-Higashi) (congenital gigantism of peroxidase granules) → E70.330
  • SyndromeBéquez César (-Steinbrinck-Chédiak-Higashi) → E70.330
  • SyndromeChédiak-Higashi (-Steinbrinck) → E70.330
  • Albinism, albinowith hematologic abnormality → E70.339
  • Albinism, albinoother specified → E70.39
  • Disorder (of)histidine metabolism → E70.40
  • Disorder (of)tryptophan metabolism → E70.5

33 more, longer entries are not listed; the search box finds them by word.

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

Hierarchy