DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 18

R70-R79 Abnormal findings on examination of blood, without diagnosis (R70-R79)

Block R70-R79 groups 9 categories with 45 billable codes in FY2027. One code is new this year.

Where it sits

  1. Chapter 18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
  2. R70-R79 Abnormal findings on examination of blood, without diagnosis (R70-R79)

Neighbouring blocks

Categories
9
Billable codes
45
CC codes
2
MCC codes
0
HCC V28 codes
0
New FY2027
1

Categories in R70-R79

  • R70

    Elevated erythrocyte sedimentation rate and abnormality of plasma viscosity

    Reticulocytosis → R70.1

    • 2 billable codes
  • R71

    Abnormality of red blood cells

    Anisocytosis → R71.8

    • 2 billable codes
    • 1 CC
  • R73

    Elevated blood glucose level

    Prediabetes, prediabetic → R73.03

    • 5 billable codes
  • R74

    Abnormal serum enzyme levels

    Transaminasemia → R74.01

    • 4 billable codes
  • R75

    Inconclusive laboratory evidence of human immunodeficiency virus [HIV]

    HIVnonconclusive test (in infants) → R75

    • Billable, no subdivisions
  • R76

    Other abnormal immunological findings in serum

    Converter, tuberculosis (test reaction) → R76.11

    • 6 billable codes
  • R77

    Other abnormalities of plasma proteins

    Proteinemia → R77.9

    • 5 billable codes
  • R78

    Findings of drugs and other substances, not normally found in blood

    Bacteremia → R78.81

    • 13 billable codes
    • 1 CC
    • 1 new
  • R79

    Other abnormal findings of blood chemistry

    Azotemia → R79.89

    • 7 billable codes

FY2027 changes in R70-R79

  • R78.72 Abnormal gadolinium level in blood New FY2027

Index main terms

  • Abnormal, abnormality, abnormalities → R70, R71, R73, R74, R76, R77, R78, R79 (44 entries)
  • Findings, abnormal, inconclusive, without diagnosis → R70, R71, R73, R74, R76, R78, R79 (36 entries)
  • Elevated, elevation → R70, R73, R74, R76, R79 (22 entries)
  • Antibody → R76 (5 entries)
  • Positive → R75, R76, R78 (5 entries)
  • Prolonged, prolongation (of) → R79 (4 entries)
  • Reaction → R76 (4 entries)
  • Decrease (d) → R71, R73 (3 entries)
  • Test, tests, testing (for) → R75, R76 (3 entries)
  • Drop (in) → R71 (2 entries)
  • HIV → R75 (2 entries)
  • Impaired, impairment (function) → R73 (2 entries)
  • Lupus → R76 (2 entries)
  • Acetonemia → R79 (1 entry)
  • Anisocytosis → R71 (1 entry)

+22 more main terms; the search box finds them by word.

Block instructions

Excludes2

  • abnormal findings on antenatal screening of mother (O28.-) O28
  • abnormalities of lipids (E78.-) E78
  • abnormalities of platelets and thrombocytes (D69.-) D69
  • abnormalities of white blood cells classified elsewhere (D70-D72) D70 D72
  • coagulation hemorrhagic disorders (D65-D68) D65 D68
  • diagnostic abnormal findings classified elsewhere - see Alphabetical Index
  • hemorrhagic and hematological disorders of newborn (P50-P61) P50 P61

Notes that also apply

Chapter 18 instructions (Notes 9, Excludes2 4): printed on the chapter 18 page.