Abnormality of alphafetoprotein

This code indicates an abnormal level of alpha-fetoprotein (AFP) detected in a patient's blood, typically identified through laboratory testing. Elevated or decreased AFP levels can be indicative of various underlying conditions, particularly during pregnancy or in the context of certain cancers.

Use this code when laboratory results confirm an abnormal AFP level, and the specific cause or definitive diagnosis is not yet established or is being investigated. This is commonly used in prenatal screening for neural tube defects or chromosomal abnormalities, or in the workup for suspected hepatocellular carcinoma or germ cell tumors. Documentation should clearly state "abnormal AFP" or specify whether the level is elevated or decreased.

• Do not use this code if a definitive diagnosis explaining the abnormal AFP is already established and coded.
• Sequence this code as a secondary diagnosis when the primary reason for the encounter is the investigation of the abnormal AFP.
• Distinguish from codes for specific conditions (e.g., spina bifida, hepatocellular carcinoma) once those diagnoses are confirmed.