I created this when I was learning to be a DM. I should have shared this years ago, but it wasn't until now that I realized folks may want this stuff. Sorry for the delay... 
This information does not apply to more southern areas (my apologies), but it would be kind of cool to make this a sticky and have folks from So/Cal add pertinent information.
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St. Johns Pleasant Valley (805)389-5944 or (805) 389-5800
2309 Antonio Ave, Camarillo
From Anacapa 18 mi by boat, 22 miles by car
Los Robles (805) 497-3954
215 W Janss Rd, Thousand Oaks
From Anacapa boat 18 mi, car 32 miles by car
UCLA Gonda (Chamber)
200 Medical Plaza, Suite B265-29
(310)794-9014
Phone 24 hour: 1800-UCLA888
Ventura County Medical Center (805) 652-6000,
3291 Loma Vista Rd, Ventura
From Anacapa boat 18 mi, car 3 miles by car
**No Chamber**
Santa Monica-UCLA Medical Center (310) 319-4765
(310) 319-4000 (310) 319-4700
1250 16th St, Santa Monica
**No Chamber**
USC Catalina Marine Lab
310-510-1053
* Transportation Method: Coast Guard Helo or boat
# Local EMS telephone number Catalina Baywatch: Channel 16
# United States Coast Guard Channel 16 on Marine VHF Radio
# Divers Alert Network (DAN): 1-919-684-8111 or 1-800-326-3822
1-310-457-2525 Zuma
1-310-394-3263 Santa Monica HQ
1-310-215-2112 U.S. Coast Guard
For a list of chambers and Physicians Certified in Diving and Hyperbaric Medicine
California Diving Physicians

This information does not apply to more southern areas (my apologies), but it would be kind of cool to make this a sticky and have folks from So/Cal add pertinent information.
*******
St. Johns Pleasant Valley (805)389-5944 or (805) 389-5800
2309 Antonio Ave, Camarillo
From Anacapa 18 mi by boat, 22 miles by car
Los Robles (805) 497-3954
215 W Janss Rd, Thousand Oaks
From Anacapa boat 18 mi, car 32 miles by car
UCLA Gonda (Chamber)
200 Medical Plaza, Suite B265-29
(310)794-9014
Phone 24 hour: 1800-UCLA888
Ventura County Medical Center (805) 652-6000,
3291 Loma Vista Rd, Ventura
From Anacapa boat 18 mi, car 3 miles by car
**No Chamber**
Santa Monica-UCLA Medical Center (310) 319-4765
(310) 319-4000 (310) 319-4700
1250 16th St, Santa Monica
**No Chamber**
USC Catalina Marine Lab
310-510-1053
* Transportation Method: Coast Guard Helo or boat
# Local EMS telephone number Catalina Baywatch: Channel 16
# United States Coast Guard Channel 16 on Marine VHF Radio
# Divers Alert Network (DAN): 1-919-684-8111 or 1-800-326-3822
1-310-457-2525 Zuma
1-310-394-3263 Santa Monica HQ
1-310-215-2112 U.S. Coast Guard
For a list of chambers and Physicians Certified in Diving and Hyperbaric Medicine
California Diving Physicians