I understand that practically any op amp can be used in single-supply mode as long as the application (interface, measurement, etc) does not require dual-supply for specific reasons.
Is there a reasons why the MIC920 (being a general purpose op amp) does not list single-supply (i.e. 0-5 V) as an option?
Is there a way to determine if it's rail-to-rail?
The planned use would be amplification of mV level positive-only pulse signals by 100-1000 times between 500 Hz - 20 kHz for reading by an MCU.
Look at the Maximum Output Voltage Swing.
With \$\pm\$5V supply voltage, the output range is \$\pm\$3V. So your output will not got to ground in a single supply, but will be stuck at a minimum voltage of at least 2V.
With \$\pm\$9V the datasheet is even more conservative and specifies a headroom of -2.8V.
These values are given for a load resisitance of 2k\$\Omega\$, so if your load will be high impedance, then the minimum output voltage will probably be a bit higher.
But the OpAmp is clearly not designed as a single supply device, as the output is not nearly R2R.
Figure 2-12 shows you the negative output voltage for \$\pm\$9V supply rails vs. output current - and even at 0mA the output will not go below -8V. So even with a really high impedance load your output would not be able to go lower than 1V above ground.
