Doc Anderson is a traveling doctor in the Commonwealth in 2287. She can be recruited into settlements as soon as a surgery center has been constructed, and there is 20 settlers total in the linked settlements.
If assigned as a surgery center vendor in a settlement, the surgery center becomes a level 4 vendor with special items. Doc Anderson sells Addictol while other settlers assigned to a surgery center do not. She also has consistent supplies of Buffout, Jet, Med-X, Mentats and Psycho, where other settlers will carry only a few of these chems at a time.
If assigned to a surgery center, her cap-count rises from somewhere around 200 or 300 to 700+.
pcxboxone The dialog option to recruit her may not even be available when one meets her.[verified]
pcxboxone Some Level 4 merchants won't travel to or stay at a settlement after being assigned there. The Level 4 merchants seem to remain at a settlement after being assigned there after Patch 1.4. [verified]
After the merchant has been assigned, disable them and any other travelling companions they spawned with, such as accompanying mercenaries ("prid [ref id]", "disable"); fast travel away from the area they spawned in; then walk, don't fast travel, back to that exact same area and a different random encounter should occur, such as wild mongrels or synths; if so, re-enable the merchant ("prid [ref id]", "enable"); fast travel to the assigned settlement; and finally, move the merchant to the player character (prid 00190047, moveto player). Now the merchant should stay put.
For some reason she can just go away from the settlement and nothing can stop her when using moveto and enable commands. If this happens, try to wait a day after asking to join the settlement. Then use player.moveto 00190047 command. It should teleport the player to the place where they had met her, but there will be only another encounter. After dealing with enemies (if any) use prid 00190047 and enable commands. She will appear and travel by herself to the assigned place after some time (usual for other NPCs). It seems that she becomes disabled when she should start her journey to the settlement.
Another workaround is the same as the one with Ron Staples. If one meets her and she does not leave the cabin close to Drumlin Diner, disable her, fast travel far away, get back to Drumlin diner and the cabin, enable her. watch out though, as if there's a random encounter like wild mongrels, synths, raiders, or super mutants, she's likely to die fast. From here she travels off heading for Corvega facility, passing the destroyed house where the roachking might lie in wait, turns to Jalbert brothers and proceeds to Graygarden. She then wanders further between Arcjet and rocky narrows (Gunner-zone), leaves Gorski's to her right and eventually arrives at Abernathy's farm.
When summoning her to the settlement with the moveto player console command when she failed to show up after being recruited, she could be assigned to the surgery center, but would walk off and disappear, even after using the fixes suggested above. Attempting to summon her back with moveto player did nothing (she failed to appear near my character). However, using prid 00190047 then disable and enable, then finally summoning her with moveto player caused her to appear again, work correctly, and stay in the settlement for good afterward. It would seem that before any fixes work on her permanently, she first has to "get lost", be disabled, enabled, then summoned to the desired settlement and assigned.
Another reason why this bug might occur is by recruiting her to a settlement with "maximum population". Try to increase the player's Charisma or move one of the pre-existing settlers to another settlement then recruit her.
pcps4xboxone Sometimes Doc Anderson's random encounter may spawn again after recruiting her. [verified]
Best thing to do is walk away from her and not talk to her and she should be back in her assigned settlement.