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.
Default
9
Metadata
SSDI
| 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 |
