As nouns the difference between physio and doc
is that physio is a physiotherapist while doc is a doctor.
As a proper noun Doc is
a nickname for a medical doctor, a person with an advanced educational degree, or a learned person.
As an initialism DOC is
drug of choice.
physio
English
Noun
(
en noun)
(colloquial) A physiotherapist.
(colloquial, uncountable) Physiotherapy. doc
English
Etymology 1
From by shortening.
Noun
(
en noun)
(informal) A doctor.
Etymology 2
From (document) by shortening.
Noun
(
en noun)
(informal) A document.
Usage notes
In professional jargon, this word is used especially in the plural to refer to technical documentation or collected legal evidence: "I'm not sure about that. I'll have to check the docs ."