superspecialist

noun

su·​per·​spe·​cial·​ist ˌsü-pər-ˈspe-sh(ə-)list 

plural superspecialists

: a specialist concentrating or practicing in a narrow range of a specialty

was sent to a superspecialist for her rare heart condition

superspecialization

ˌsü-pər-ˌspe-sh(ə-)lə-ˈzā-shən 

noun

plural superspecializations

surgical superspecialization

superspecialized

ˌsü-pər-ˈspe-shə-ˌlīzd 

adjective

superspecialized care

superspecialized research

Word History

First Known Use

1900, in the meaning defined above