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If you would like to pursue this matter, there are many "ADA" attorneys in California that specialize in pursuing property owners for non-compliance with disabled access regulations in the state. You may even find that you can get a small recovery as the named plaintiff.
You can find local attorneys using the State and local Bar Association directories, or private directories such as www.AVVO.com; www.FindLaw.com; or www.Martindale.com (I personally find www.AVVO.com to be the most user friendly).
The ADA violation is based on failure to permit access. It is not based on the fact that you are relieved from your injury.
As I noted if you want to pursue this, you are going to want to retain a lawyer that specializes in this, California's ADA laws use what is termed a "Private Attorney General Statute" - which basically allows private attorneys to enforce state laws against private business.