R94.6 Abnormal results of thyroid function studies

Billable ICD-10-CM code, FY2026.

Applies from R94 Abnormal results of function studies

Includes

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

MS-DRG index

Defines the logic of DRG(s) 643-645 in MDC 10.

Approximate ICD-9-CM (GEMs)

• 794.5 Nonspecific abnormal results of function study of thyroid

Code annotations containing back-references to R94.6

Back-references to R94

• Type 1 Excludes: T88.7 Unspecified adverse effect of drug or medicament ("specified adverse effects of drugs and medicaments (A00-R94 and T80-T88.6, T88.8)")

Diagnosis Index entries for R94.6

• Abnormal, abnormality, abnormalities › function studies › thyroid
• Abnormal, abnormality, abnormalities › scan › thyroid
• Findings, abnormal, inconclusive, without diagnosis › function study NEC › endocrine NEC › thyroid
• Findings, abnormal, inconclusive, without diagnosis › scan NEC › thyroid
• Findings, abnormal, inconclusive, without diagnosis › thyroid (function) (metabolic rate) (scan) (uptake)

Nearby codes

• R94.30 Abnormal result of cardiovascular function study, unspecified
• R94.31 Abnormal electrocardiogram [ECG] [EKG]
• R94.39 Abnormal result of other cardiovascular function study
• R94.4 Abnormal results of kidney function studies
• R94.5 Abnormal results of liver function studies
• R94.6 Abnormal results of thyroid function studies (this code)
• R94.7 Abnormal results of other endocrine function studies
• R94.8 Abnormal results of function studies of other organs and systems