Other deficiencies of circulating enzymes

This code represents a group of rare metabolic disorders characterized by insufficient levels or impaired function of specific enzymes found in the bloodstream, excluding those primarily involved in coagulation or lipid metabolism. These deficiencies disrupt various biochemical pathways, leading to a range of systemic symptoms depending on the affected enzyme.

Use this code for documented cases of enzymatic deficiencies affecting circulating enzymes, such as alpha-1 antitrypsin deficiency, hereditary angioedema due to C1 esterase inhibitor deficiency, or other specified but rare circulating enzyme defects. Documentation should clearly identify the specific enzyme deficiency and its impact.

• Ensure the documentation specifies a circulating enzyme deficiency, not an intracellular or tissue-specific enzyme defect.
• Avoid using this code for deficiencies of coagulation factors (e.g., hemophilia) or lipid-related enzymes, which have more specific codes.
• Always review the medical record for the precise enzyme identified to ensure accurate coding.