DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

R94 Abnormal results of function studies

  • Header · not billable

R94 is not billable. The category heads 23 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

  • Lowbasal metabolic rate → R94.8
  • Highbasal metabolic rate → R94.8
  • Diminished, diminutionvital capacity → R94.2

Where it sits

  1. Chapter 18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
  2. R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)
  3. R94 Abnormal results of function studies
Billable codes
23
Subdivisions
9
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
70

Codes in R94

  1. R94.0
    Abnormal results of function studies of central nervous system
    Header
  2. R94.01
    Abnormal electroencephalogram [EEG]
    Billable
  3. R94.02
    Abnormal brain scan
    Billable
  4. R94.09
    Abnormal results of other function studies of central nervous system
    Billable
  5. R94.1
    Abnormal results of function studies of peripheral nervous system and special senses
    Header
  6. R94.11
    Abnormal results of function studies of eye
    Header
  7. R94.110
    Abnormal electro-oculogram [EOG]
    Billable
  8. R94.111
    Abnormal electroretinogram [ERG]
    Billable
    Inclusion terms 1

    Inclusion terms

    • Abnormal retinal function study
  9. R94.112
    Abnormal visually evoked potential [VEP]
    Billable
  10. R94.113
    Abnormal oculomotor study
    Billable
  11. R94.118
    Abnormal results of other function studies of eye
    Billable
  12. R94.12
    Abnormal results of function studies of ear and other special senses
    Header
  13. R94.120
    Abnormal auditory function study
    Billable
  14. R94.121
    Abnormal vestibular function study
    Billable
  15. R94.128
    Abnormal results of other function studies of ear and other special senses
    Billable
  16. R94.13
    Abnormal results of function studies of peripheral nervous system
    Header
  17. R94.130
    Abnormal response to nerve stimulation, unspecified
    Billable
  18. R94.131
    Abnormal electromyogram [EMG]
    Billable
    Excludes1 1

    Excludes1

    • electromyogram of eye (R94.113) R94.113
  19. R94.138
    Abnormal results of other function studies of peripheral nervous system
    Billable
  20. R94.2
    Abnormal results of pulmonary function studies
    Billable
    Inclusion terms 2

    Inclusion terms

    • Reduced ventilatory capacity
    • Reduced vital capacity
  21. R94.3
    Abnormal results of cardiovascular function studies
    Header
  22. R94.30
    Abnormal result of cardiovascular function study, unspecified
    Billable
  23. R94.31
    Abnormal electrocardiogram [ECG] [EKG]
    Billable
    Excludes1 1

    Excludes1

    • long QT syndrome (I45.81) I45.81
  24. R94.39
    Abnormal result of other cardiovascular function study
    Billable
    Inclusion terms 3

    Inclusion terms

    • Abnormal electrophysiological intracardiac studies
    • Abnormal phonocardiogram
    • Abnormal vectorcardiogram
  25. R94.4
    Abnormal results of kidney function studies
    Billable
    Inclusion terms 1

    Inclusion terms

    • Abnormal renal function test
  26. R94.5
    Abnormal results of liver function studies
    Billable
  27. R94.6
    Abnormal results of thyroid function studies
    Billable
  28. R94.7
    Abnormal results of other endocrine function studies
    Billable
    Excludes2 1

    Excludes2

    • abnormal glucose (R73.0-) R73.0
  29. R94.8
    Abnormal results of function studies of other organs and systems
    Billable
    Inclusion terms 3

    Inclusion terms

    • Abnormal basal metabolic rate [BMR]
    • Abnormal bladder function test
    • Abnormal splenic function test

Sources of each column.

Instructions

At R94

Includes

  • abnormal results of radionuclide [radioisotope] uptake studies
  • abnormal results of scintigraphy

Notes that also apply

Block R90-R94 instructions (Includes 6, Excludes1 2): printed on the block page.

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

Index entries

  • Abnormal, abnormality, abnormalitieselectroencephalogram [EEG] → R94.01
  • Abnormal, abnormality, abnormalitiesbrain scan → R94.02
  • Abnormal, abnormality, abnormalitieselectro-oculogram [EOG] → R94.110
  • Abnormal, abnormality, abnormalitieselectroretinogram [ERG] → R94.111
  • Abnormal, abnormality, abnormalitiesretinal function study → R94.111
  • Abnormal, abnormality, abnormalitiesvisually evoked potential (VEP) → R94.112
  • Abnormal, abnormality, abnormalitiesoculomotor study → R94.113
  • Abnormal, abnormality, abnormalitiesresponse to nerve stimulation → R94.130
  • Abnormal, abnormality, abnormalitieselectromyogram [EMG] → R94.131
  • Abnormal, abnormality, abnormalitiescaloric test → R94.138
  • Diminished, diminutionvital capacity → R94.2
  • Reducedventilatory or vital capacity → R94.2
  • Abnormal, abnormality, abnormalitieselectrocardiogram [ECG] [EKG] → R94.31
  • Prolonged, prolongation (of)QT interval → R94.31
  • Abnormal, abnormality, abnormalitieselectrophysiological intracardiac studies → R94.39
  • Abnormal, abnormality, abnormalitiesphonocardiogram → R94.39
  • Abnormal, abnormality, abnormalitiesvectorcardiogram → R94.39
  • Findings, abnormal, inconclusive, without diagnosisstress test → R94.39
  • Findings, abnormal, inconclusive, without diagnosisvectorcardiogram (VCG) → R94.39
  • Abnormal, abnormality, abnormalitiescreatinine clearance → R94.4
  • Abnormal, abnormality, abnormalitieskidney function test → R94.4
  • Abnormal, abnormality, abnormalitiesrenal function test → R94.4
  • Findings, abnormal, inconclusive, without diagnosiscreatinine clearance → R94.4
  • Findings, abnormal, inconclusive, without diagnosisthyroid (function) (metabolic rate) (scan) (uptake) → R94.6
  • Abnormal, abnormality, abnormalitiesbasal metabolic rate → R94.8
  • Depression (acute) (mental)basal metabolic rate → R94.8
  • Elevated, elevationbasal metabolic rate → R94.8
  • Findings, abnormal, inconclusive, without diagnosisfunction study NEC → R94.8
  • Findings, abnormal, inconclusive, without diagnosisscan NEC → R94.8
  • Highbasal metabolic rate → R94.8
  • Lowbasal metabolic rate → R94.8
  • Abnormal, abnormality, abnormalitiesfunction studiesbrain → R94.09
  • Abnormal, abnormality, abnormalitiesfunction studieseye NEC → R94.118
  • Abnormal, abnormality, abnormalitiesfunction studiesauditory → R94.120
  • Abnormal, abnormality, abnormalitiesfunction studiesvestibular → R94.121
  • Abnormal, abnormality, abnormalitiesfunction studiesear → R94.128
  • Abnormal, abnormality, abnormalitiesfunction studiesspecial senses NEC → R94.128
  • Abnormal, abnormality, abnormalitiesfunction studiespulmonary → R94.2
  • Abnormal, abnormality, abnormalitiespulmonarytest results → R94.2
  • Findings, abnormal, inconclusive, without diagnosisfunction study NECpulmonary → R94.2

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

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