DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 2

D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)

Block D37-D48 groups 12 categories with 115 billable codes in FY2027.

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)

Neighbouring blocks

Categories
12
Billable codes
115
CC codes
10
MCC codes
0
HCC V28 codes
34
New FY2027
0

Categories in D37-D48

  • D37

    Neoplasm of uncertain behavior of oral cavity and digestive organs

    Gastrinomaunspecified site → D37.9

    • 17 billable codes
  • D38

    Neoplasm of uncertain behavior of middle ear and respiratory and intrathoracic organs

    Adenomabronchial → D38.1

    • 7 billable codes
  • D39

    Neoplasm of uncertain behavior of female genital organs

    Mola destruens → D39.2

    • 7 billable codes
  • D40

    Neoplasm of uncertain behavior of male genital organs

    Tumortesticular → D40.10

    • 6 billable codes
  • D41

    Neoplasm of uncertain behavior of urinary organs

    Reninoma → D41.0-

    • 13 billable codes
  • D42

    Neoplasm of uncertain behavior of meninges

    –

    • 3 billable codes
    • 3 with HCC
  • D43

    Neoplasm of uncertain behavior of brain and central nervous system

    Subependymomaunspecified site → D43.2

    • 7 billable codes
    • 7 with HCC
  • D44

    Neoplasm of uncertain behavior of endocrine glands

    Pinealoma → D44.5

    • 11 billable codes
    • 5 with HCC
  • D45

    Polycythemia vera

    Heilmeyer-Schoner disease → D45

    • Billable, no subdivisions
    • 1 with HCC
  • D46

    Myelodysplastic syndromes

    Myelodysplasia → D46.9

    • 11 billable codes
    • 2 CC
    • 11 with HCC
  • D47

    Other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue

    Mastocytosis → D47.09

    • 11 billable codes
    • 8 CC
    • 7 with HCC
  • D48

    Neoplasm of uncertain behavior of other and unspecified sites

    Ecchondrosis → D48.0

    • 21 billable codes

Index main terms

  • Tumor → D37, D38, D39, D40, D41, D44, D47, D48 (34 entries)
  • Desmoid (extra-abdominal) (tumor) → D48 (16 entries)
  • Paraganglioma → D44 (14 entries)
  • Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) → D46, D47 (12 entries)
  • Syndrome → D46, D47 (11 entries)
  • Disease, diseased → D47 (8 entries)
  • Papilloma → D39, D41 (7 entries)
  • Adenoma → D38, D44 (5 entries)
  • Mastocytosis → D47 (5 entries)
  • Mole (pigmented) → D39 (5 entries)
  • Ependymoma (epithelial) (malignant) → D43 (4 entries)
  • Myelodysplastic syndrome → D46 (4 entries)
  • Myelofibrosis → D47 (4 entries)
  • Astrocytoma (cystic) → D43 (3 entries)
  • Gammopathy (of undetermined significance [MGUS]) → D47 (3 entries)

+62 more main terms; the search box finds them by word.

Block instructions

Notes

  • Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made. D37 D44 D48

Excludes1

  • neoplasms of unspecified behavior (D49.-) D49

Notes that also apply

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.