R94 — Abnormal results of function studies
Is R94 billable?
No — R94 is a non-billable header code. R94 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 23 billable codes beneath R94.
Billable codes under this header
- R94.2Abnormal results of pulmonary function studies
- R94.4Abnormal results of kidney function studies
- R94.5Abnormal results of liver function studies
- R94.6Abnormal results of thyroid function studies
- R94.7Abnormal results of other endocrine function studies
- R94.8Abnormal results of function studies of other organs and systems
- R94.01Abnormal electroencephalogram [EEG]
- R94.02Abnormal brain scan
- R94.09Abnormal results of other function studies of central nervous system
- R94.30Abnormal result of cardiovascular function study, unspecified
- R94.31Abnormal electrocardiogram [ECG] [EKG]
- R94.39Abnormal result of other cardiovascular function study
- R94.110Abnormal electro-oculogram [EOG]
- R94.111Abnormal electroretinogram [ERG]
- R94.112Abnormal visually evoked potential [VEP]
- R94.113Abnormal oculomotor study
- R94.118Abnormal results of other function studies of eye
- R94.120Abnormal auditory function study
- R94.121Abnormal vestibular function study
- R94.128Abnormal results of other function studies of ear and other special senses
- R94.130Abnormal response to nerve stimulation, unspecified
- R94.131Abnormal electromyogram [EMG]
- R94.138Abnormal results of other function studies of peripheral nervous system
R94 at a glance
| Code | R94 |
|---|---|
| Description | Abnormal results of function studies |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Includes
Conditions classified to R94.
- abnormal results of radionuclide [radioisotope] uptake studies
- abnormal results of scintigraphy
Excludes1 — never code together — inherited from R90-R94
The conditions below can never be reported together with R94 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Excludes2 — not included here — inherited from Chapter 18
The conditions below are not part of R94, but a patient may have both at the same time. When documentation supports it, R94 and the excluded code may both be reported.
What codes fall under R94? (9)
- R94.0Abnormal results of function studies of central nervous systemnot billable
- R94.1Abnormal results of function studies of peripheral nervous system and special sensesnot billable
- R94.2Abnormal results of pulmonary function studies
- R94.3Abnormal results of cardiovascular function studiesnot billable
- R94.4Abnormal results of kidney function studies
- R94.5Abnormal results of liver function studies
- R94.6Abnormal results of thyroid function studies
- R94.7Abnormal results of other endocrine function studies
- R94.8Abnormal results of function studies of other organs and systems
How long has R94 existed?
R94 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with R94?
ICD-10-CM declares these codes mutually exclusive with R94 — exactly one of each pair can be correct for a given encounter.