Serum Beta-2 Microglobulin Pretreatment Level
Notes
**Note 1:** Serum microglobulin is part of the Revised International Staging (RISS). Use the cut points listed in the table below regardless of the lab's reference range. **Note 2:** Record this data item based on a blood test performed at diagnosis (pre-treatment). In the absence of the lab test, a physician's statement of the exact value can be used. Use the highest value available. **Note 3:** If there is no mention of the serum beta-2 microglobulin, code 9. **Note 4:** If Schema Discriminator 1: Plasma Cell Myeloma Terminology is coded to 1 or 9, code 5.Code | Description |
---|---|
0 | β2-microglobulin < 3.5 mg/L |
1 | β2-microglobulin ≥ 3.5 mg/L < 5.5 mg/L |
2 | β2-microglobulin ≥ 5.5 mg/L |
5 | Schema Discriminator 1: Plasma Cell Myeloma Terminology coded to 1 or 9 |
7 | Test ordered, results not in chart |
9 | Not documented in medical record Serum Beta-2 Microglobulin Pretreatment Level not assessed or unknown if assessed |