ICD-10-CM Section · R90-R94
Abnormal findings on diagnostic imaging and in function studies, without diagnosis
85 codes in this section
85
Total Codes
64
Billable
21
Header (Non-Billable)
5
Top-Level Codes
About Section R90-R94
Section R90-R94 (R90-R94) covers abnormal findings on diagnostic imaging and in function studies, without diagnosis. It sits within the Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified chapter (R00-R99). This section contains 85 ICD-10-CM codes, 64 billable diagnoses you can submit on a claim, and 21 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in R90-R94
Grouped by 3-character root code. Click any code for full detail.
R90
Abnormal findings on diagnostic imaging of central nervous system
5 subcodes
| R90.0 | Intracranial space-occupying lesion found on diagnostic imaging of central nervous system | Billable |
| R90.8 | Other abnormal findings on diagnostic imaging of central nervous system | Header |
| R90.81 | Abnormal echoencephalogram | Billable |
| R90.82 | White matter disease, unspecified | Billable |
| R90.89 | Other abnormal findings on diagnostic imaging of central nervous system | Billable |
R91
Abnormal findings on diagnostic imaging of lung
2 subcodes
| R91.1 | Solitary pulmonary nodule | Billable |
| R91.8 | Other nonspecific abnormal finding of lung field | Billable |
R92
Abnormal and inconclusive findings on diagnostic imaging of breast
22 subcodes
| R92.0 | Mammographic microcalcification found on diagnostic imaging of breast | Billable |
| R92.1 | Mammographic calcification found on diagnostic imaging of breast | Billable |
| R92.2 | Inconclusive mammogram | Billable |
| R92.3 | Mammographic density found on imaging of breast | Header |
| R92.30 | Dense breasts, unspecified | Billable |
| R92.31 | Mammographic fatty tissue density of breast | Header |
| R92.311 | Mammographic fatty tissue density, right breast | Billable |
| R92.312 | Mammographic fatty tissue density, left breast | Billable |
| R92.313 | Mammographic fatty tissue density, bilateral breasts | Billable |
| R92.32 | Mammographic fibroglandular density of breast | Header |
| R92.321 | Mammographic fibroglandular density, right breast | Billable |
| R92.322 | Mammographic fibroglandular density, left breast | Billable |
| R92.323 | Mammographic fibroglandular density, bilateral breasts | Billable |
| R92.33 | Mammographic heterogeneous density of breast | Header |
| R92.331 | Mammographic heterogeneous density, right breast | Billable |
| R92.332 | Mammographic heterogeneous density, left breast | Billable |
| R92.333 | Mammographic heterogeneous density, bilateral breasts | Billable |
| R92.34 | Mammographic extreme density of breast | Header |
| R92.341 | Mammographic extreme density, right breast | Billable |
| R92.342 | Mammographic extreme density, left breast | Billable |
| R92.343 | Mammographic extreme density, bilateral breasts | Billable |
| R92.8 | Other abnormal and inconclusive findings on diagnostic imaging of breast | Billable |
R93
Abnormal findings on diagnostic imaging of other body structures
22 subcodes
| R93.0 | Abnormal findings on diagnostic imaging of skull and head, not elsewhere classified | Billable |
| R93.1 | Abnormal findings on diagnostic imaging of heart and coronary circulation | Billable |
| R93.2 | Abnormal findings on diagnostic imaging of liver and biliary tract | Billable |
| R93.3 | Abnormal findings on diagnostic imaging of other parts of digestive tract | Billable |
| R93.4 | Abnormal findings on diagnostic imaging of urinary organs | Header |
| R93.41 | Abnormal radiologic findings on diagnostic imaging of renal pelvis, ureter, or bladder | Billable |
| R93.42 | Abnormal radiologic findings on diagnostic imaging of kidney | Header |
| R93.421 | Abnormal radiologic findings on diagnostic imaging of right kidney | Billable |
| R93.422 | Abnormal radiologic findings on diagnostic imaging of left kidney | Billable |
| R93.429 | Abnormal radiologic findings on diagnostic imaging of unspecified kidney | Billable |
| R93.49 | Abnormal radiologic findings on diagnostic imaging of other urinary organs | Billable |
| R93.5 | Abnormal findings on diagnostic imaging of other abdominal regions, including retroperitoneum | Billable |
| R93.6 | Abnormal findings on diagnostic imaging of limbs | Billable |
| R93.7 | Abnormal findings on diagnostic imaging of other parts of musculoskeletal system | Billable |
| R93.8 | Abnormal findings on diagnostic imaging of other specified body structures | Header |
| R93.81 | Abnormal radiologic findings on diagnostic imaging of testis | Header |
| R93.811 | Abnormal radiologic findings on diagnostic imaging of right testicle | Billable |
| R93.812 | Abnormal radiologic findings on diagnostic imaging of left testicle | Billable |
| R93.813 | Abnormal radiologic findings on diagnostic imaging of testicles, bilateral | Billable |
| R93.819 | Abnormal radiologic findings on diagnostic imaging of unspecified testicle | Billable |
| R93.89 | Abnormal findings on diagnostic imaging of other specified body structures | Billable |
| R93.9 | Diagnostic imaging inconclusive due to excess body fat of patient | Billable |
R94
Abnormal results of function studies
29 subcodes
| R94.0 | Abnormal results of function studies of central nervous system | Header |
| R94.01 | Abnormal electroencephalogram [EEG] | Billable |
| R94.02 | Abnormal brain scan | Billable |
| R94.09 | Abnormal results of other function studies of central nervous system | Billable |
| R94.1 | Abnormal results of function studies of peripheral nervous system and special senses | Header |
| R94.11 | Abnormal results of function studies of eye | Header |
| R94.110 | Abnormal electro-oculogram [EOG] | Billable |
| R94.111 | Abnormal electroretinogram [ERG] | Billable |
| R94.112 | Abnormal visually evoked potential [VEP] | Billable |
| R94.113 | Abnormal oculomotor study | Billable |
| R94.118 | Abnormal results of other function studies of eye | Billable |
| R94.12 | Abnormal results of function studies of ear and other special senses | Header |
| R94.120 | Abnormal auditory function study | Billable |
| R94.121 | Abnormal vestibular function study | Billable |
| R94.128 | Abnormal results of other function studies of ear and other special senses | Billable |
| R94.13 | Abnormal results of function studies of peripheral nervous system | Header |
| R94.130 | Abnormal response to nerve stimulation, unspecified | Billable |
| R94.131 | Abnormal electromyogram [EMG] | Billable |
| R94.138 | Abnormal results of other function studies of peripheral nervous system | Billable |
| R94.2 | Abnormal results of pulmonary function studies | Billable |
| R94.3 | Abnormal results of cardiovascular function studies | Header |
| R94.30 | Abnormal result of cardiovascular function study, unspecified | Billable |
| R94.31 | Abnormal electrocardiogram [ECG] [EKG] | Billable |
| R94.39 | Abnormal result of other cardiovascular function study | Billable |
| R94.4 | Abnormal results of kidney function studies | Billable |
| R94.5 | Abnormal results of liver function studies | Billable |
| R94.6 | Abnormal results of thyroid function studies | Billable |
| R94.7 | Abnormal results of other endocrine function studies | Billable |
| R94.8 | Abnormal results of function studies of other organs and systems | Billable |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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