Abnormal results of function studies of organs and systems

This code signifies abnormal findings from physiological function tests of various organ systems not specifically classified elsewhere. It indicates that diagnostic testing has revealed a functional impairment or deviation from normal physiological parameters in a system such as the musculoskeletal, integumentary, or endocrine system (excluding those with more specific R94 codes).

Use this code when documentation indicates abnormal results from function studies of organs or systems like muscle strength testing, skin conductivity tests, or specific endocrine function tests, and a more definitive diagnosis is not yet established or available. This code is appropriate when the abnormal finding is the primary reason for the encounter or a significant finding requiring further investigation.

• Do not use this code if a more specific R94 code exists for the organ system (e.g., R94.31 for nerve function studies).
• Always sequence this code after the definitive diagnosis if one is eventually determined, or as the primary diagnosis if the abnormal finding is the reason for the encounter and no definitive diagnosis is made.
• Ensure the medical record clearly documents the specific function study performed, the abnormal result, and the organ or system affected to support the use of this code.