I find myself searching from time-to-time what are the standard 'thresholds' for what cyclomatic complexity means. I'll put the table here so that later I know where to find it.
| CC | Type of procedure | Risk |
|---|---|---|
| 1--4 | A simple procedure | Low |
| 5--10 | A well structured and stable procedure | Low |
| 11--20 | A more complex procedure | Moderate |
| 21--50 | A complex procedure, alarming | High |
| >50 | An error-prone, extremely troublesome, untestable procedure | Very high |
You can read more about this metric here. An older version of an utility I wrote and use for estimating this metric is here