Animals for emotional support of the PTSD patient are not covered by the ADA.
Regardless of what specific tasks a service dog performs, once it can reliably perform at least one disability-mitigating task, it is considered a service dog, and the provisions of the ADA apply and need to be enforced. Any state or local law that attempts to countermand, or make more restrictive, any provision of the ADA is essentially unenforceable because when state or local laws do not align with federal law, federal law takes priority.
So it depends how the service dog is labeled.
The ADA goes on to provide examples of tasks that a service dog can perform, including calming a person with post-traumatic stress disorder (PTSD) during an anxiety attack. And yet, service dogs for people with PTSD are often mislabeled as emotional support animals (ESAs), which are not covered by the ADA.
https://www.verywell.com/the-problems-with-service-dogs-the-ada-and-ptsd-2797679
Service dogs are for blind people.
I don't care if he's a Marine or not, I'm tired of all this "I need my emotional support pot-bellied pig or I'll burst in to tears!" nonsense.
Man up, Marine.
I didn't see enough information to support or refute your statement. The article refers to the dog as a Service animal, those are a class above ESA's, if the dog is trained to alert to an oncoming episode requiring the Vet to take medication or other treatment it must indeed be allowed in to work with the Vet, no differently than if it was a Seeing EYe Dog. However if the dog is only an ESA serving no real medical assistance other than a calming influence than he has no right to take the animal into otherwise restricted locations.
I don't think there is enough information available to us. While I agree with others that too many people take advantage of laws that were written with the protection of disabled in mind, like in California where it is illegal to ask for proof that the dog is a service animal, and this allows anybody to take their dirty, untrained baby into grocery stores and damn near anywhere.