Yes, if Dr. Moran is familiar with reptiles, that would be a good idea. Otherwise, it looks like you may have to drive a bit to get to one. That's not unusual because there aren't a great many reptile vets. Here are the ones I found in your general area:
Irving Street Vet Hospital
San Francisco 94122
Bay Area Bird Hospital
San Francisco 94116
All Pets Hospital
269 S Van Ness Ave
San FranciscoNNN-NN-NNNN(NNN) NNN-NNNN
Ocean Animal Clinic
Santa Cruz 95060
San Joaquin Vet Hospital
4333 N. Blackstone Ave
Unfortunately skin color changes and lethargy can be symptoms of a number of different conditions. You won't be able to provide proper treatment until you have a definite diagnosis. I'll give you some of the possibilities. It could be a thermal burn caused by the gecko getting too close to a heat lamp or resting on a heat rock. There is a fungus (yellow fungus, though it's often black or other colors) that is becoming more and more common so it's a definite possibility. A bacterial infection or an injury are also possible. I do recommend that you see a vet.
The soak that I gave you instructions for above is helpful no matter what. Sick lizards are often dehydrated, and they can absorb electrolytes through the vent when soaked. I also recommend that you get a digital probe thermometer so you can check the temperature in the cage. Being too warm or cold leads to many different problems. Day temperature should be in the high 70*s F to the low 80*s F. Temperatures over 85*F are bad. It would also be a good idea to check to make sure all the other conditions you’re providing for your gecko are right. The following site has a care sheet that you can use as a checklist to be sure.
I would be sure all conditions are optimal for your gecko, soak him twice a day, and make a vet appointment to get a definite diagnosis. If you have more questions, just let me know by clicking on REPLY. I hope this problem will clear up quickly.