Psychiatry identifies three different categories of phobias (DSM-IV,1994):

Agoraphobia
with panic attacks): 300.21
(without panic attacks): 300.01
Irrational anxiety about being in places from which escape might be difficult or embarrassing

Social phobia: 300.23
Irrational anxiety elicited by exposure to certain types of social or performance situations, also leading to avoidance behavior.

Specific phobia: 300.29
Persistent and irrational fear in the presence of some specific stimulus which commonly elicits avoidance of that stimulus, i.e., withdrawal.

SUBTYPES:
animal type - cued by animals or insects

natural environment type - cued by objects in the environment, such as storms, heights, or water

blood-injection-injury type - cued by witnessing some invasive medical procedure

situational type - cued by a specific situation, such as public transportation, tunnels, bridges, elevators, flying, driving, or enclosed spaces

other type - cued by other stimuli than the above, such as of choking, vomiting, or contracting an illness

I have agoraphobia, and mild social phobia. It does impair me to an extent. i don't have specific phobias which I am glad for- though having panic attacks in public places and feeling terribly overwhelmed by social events is no fun.

Is "WORK phobia" a recognized 300.23 phobia?

Social phobia: 300.23
Irrational anxiety elicited by exposure to certain types of social or performance situations, also leading to avoidance behavior. ;)